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scap-security-guide/SOURCES/scap-security-guide-0.1.64-sysctl_template_extension_and_bpf_rules-PR_9147.patch
CentOS Sources 9693413bb6 import scap-security-guide-0.1.63-2.el9_0
2022-09-20 11:46:01 +00:00

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From 81c2f59f42ffa2cf5a611eaeccc40c802bedd6d7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Fri, 8 Jul 2022 17:51:57 +0200
Subject: [PATCH 01/23] Remove a rule from RHEL 9 OSPP
Remove rule sysctl_net_core_bpf_jit_harden from RHEL 9 OSPP. This rule
requires to set net.core.bpf_jit_harden value to 2, the RHEL 9 default
is 1. However, bpf_jit_harden=1 disables kallsyms access from bpf
programs and all users, and it turns on constants blinding by using
random value + XOR for CAP_BPF; so the only thing in which value 1 and 2
differ is the constants blinding for CAP_SYS_ADMIN processes in the
initial user namespaces. The extra constants blinding with
bpf_jit_harden=2 does not really help with CVE mitigation.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2081728
---
products/rhel9/profiles/ospp.profile | 1 -
1 file changed, 1 deletion(-)
diff --git a/products/rhel9/profiles/ospp.profile b/products/rhel9/profiles/ospp.profile
index 244a421fb48..a7ba9532d2c 100644
--- a/products/rhel9/profiles/ospp.profile
+++ b/products/rhel9/profiles/ospp.profile
@@ -75,7 +75,6 @@ selections:
- sysctl_kernel_perf_event_paranoid
- sysctl_user_max_user_namespaces
- sysctl_kernel_unprivileged_bpf_disabled
- - sysctl_net_core_bpf_jit_harden
- service_kdump_disabled
### Audit
From bdcd2bafe5dd68448c0fc13e1aa1be64df607c8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Tue, 12 Jul 2022 11:24:42 +0200
Subject: [PATCH 02/23] Rename IDs in sysctl OVAL template
The sysctl template uses its sysctlvar parameter value as a part of OVAL
object IDs, test IDs and state IDs. That means we can't have multiple
rules using the sysctl template with the same value of sysctlvar
parameter (only differ in other parameters) because there would be
duplicate elements. We will fix this by using the rule ID as a part of
OVAL object IDs, test IDs and state IDs. That will allow to use the
template for the same sysctlvar in different rules.
---
.../oval/sysctl_kernel_ipv6_disable.xml | 4 +-
shared/templates/sysctl/oval.template | 156 +++++++++---------
2 files changed, 80 insertions(+), 80 deletions(-)
diff --git a/shared/checks/oval/sysctl_kernel_ipv6_disable.xml b/shared/checks/oval/sysctl_kernel_ipv6_disable.xml
index 1195cea518f..f971d28a047 100644
--- a/shared/checks/oval/sysctl_kernel_ipv6_disable.xml
+++ b/shared/checks/oval/sysctl_kernel_ipv6_disable.xml
@@ -19,8 +19,8 @@
</metadata>
<criteria comment="IPv6 disabled or net.ipv6.conf.all.disable_ipv6 set correctly" operator="OR">
<criteria operator="AND">
- <extend_definition comment="net.ipv6.conf.all.disable_ipv6 configuration setting check" definition_ref="sysctl_static_net_ipv6_conf_all_disable_ipv6" />
- <extend_definition comment="net.ipv6.conf.all.disable_ipv6 runtime setting check" definition_ref="sysctl_runtime_net_ipv6_conf_all_disable_ipv6" />
+ <extend_definition comment="net.ipv6.conf.all.disable_ipv6 configuration setting check" definition_ref="sysctl_net_ipv6_conf_all_disable_ipv6_static" />
+ <extend_definition comment="net.ipv6.conf.all.disable_ipv6 runtime setting check" definition_ref="sysctl_net_ipv6_conf_all_disable_ipv6_runtime" />
</criteria>
</criteria>
</definition>
diff --git a/shared/templates/sysctl/oval.template b/shared/templates/sysctl/oval.template
index 74583dbee1d..52671c06402 100644
--- a/shared/templates/sysctl/oval.template
+++ b/shared/templates/sysctl/oval.template
@@ -5,8 +5,8 @@
{{%- endif %}}
{{% macro state_static_sysctld(prefix) -%}}
- <ind:object object_ref="object_static_{{{ prefix }}}_{{{ SYSCTLID }}}"/>
- <ind:state state_ref="state_static_sysctld_{{{ SYSCTLID }}}"/>
+ <ind:object object_ref="object_static_{{{ prefix }}}_{{{ rule_id }}}"/>
+ <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}"/>
{{%- endmacro -%}}
{{%- macro sysctl_match() -%}}
{{%- if SYSCTLVAL == "" -%}}
@@ -20,13 +20,13 @@
{{%- if "P" in FLAGS -%}}
<def-group>
- <definition class="compliance" id="sysctl_{{{ SYSCTLID }}}" version="3">
+ <definition class="compliance" id="{{{ rule_id }}}" version="3">
{{{ oval_metadata("The '" + SYSCTLVAR + "' kernel parameter should be set to the appropriate value in both system configuration and system runtime.") }}}
<criteria operator="AND">
<extend_definition comment="{{{ SYSCTLVAR }}} configuration setting check"
- definition_ref="sysctl_static_{{{ SYSCTLID }}}"/>
+ definition_ref="{{{ rule_id }}}_static"/>
<extend_definition comment="{{{ SYSCTLVAR }}} runtime setting check"
- definition_ref="sysctl_runtime_{{{ SYSCTLID }}}"/>
+ definition_ref="{{{ rule_id }}}_runtime"/>
</criteria>
</definition>
</def-group>
@@ -34,7 +34,7 @@
{{%- elif "I" in FLAGS -%}}
<def-group>
- <definition class="compliance" id="sysctl_{{{ SYSCTLID }}}" version="4">
+ <definition class="compliance" id="{{{ rule_id }}}" version="4">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to the appropriate value in both system configuration and system runtime.") }}}
<criteria comment="IPv6 disabled or {{{ SYSCTLVAR }}} set correctly" operator="OR">
{{% if product in ["ubuntu1604", "ubuntu1804"] %}}
@@ -46,9 +46,9 @@
{{% endif %}}
<criteria operator="AND">
<extend_definition comment="{{{ SYSCTLVAR }}} configuration setting check"
- definition_ref="sysctl_static_{{{ SYSCTLID }}}"/>
+ definition_ref="{{{ rule_id }}}_static"/>
<extend_definition comment="{{{ SYSCTLVAR }}} runtime setting check"
- definition_ref="sysctl_runtime_{{{ SYSCTLID }}}"/>
+ definition_ref="{{{ rule_id }}}_runtime"/>
</criteria>
</criteria>
</definition>
@@ -58,33 +58,33 @@
{{%- if "R" in FLAGS -%}}
<def-group>
- <definition class="compliance" id="sysctl_runtime_{{{ SYSCTLID }}}" version="3">
+ <definition class="compliance" id="{{{ rule_id }}}_runtime" version="3">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system runtime.") }}}
<criteria operator="AND">
<criterion comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}}"
- test_ref="test_sysctl_runtime_{{{ SYSCTLID }}}"/>
+ test_ref="test_{{{ rule_id }}}_runtime"/>
</criteria>
</definition>
- <unix:sysctl_test id="test_sysctl_runtime_{{{ SYSCTLID }}}" version="1"
+ <unix:sysctl_test id="test_{{{ rule_id }}}_runtime" version="1"
comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}}"
check="all" check_existence="all_exist">
- <unix:object object_ref="object_sysctl_runtime_{{{ SYSCTLID }}}"/>
- <unix:state state_ref="state_sysctl_runtime_{{{ SYSCTLID }}}"/>
+ <unix:object object_ref="object_{{{ rule_id }}}_runtime"/>
+ <unix:state state_ref="state_{{{ rule_id }}}_runtime"/>
</unix:sysctl_test>
- <unix:sysctl_object id="object_sysctl_runtime_{{{ SYSCTLID }}}" version="1">
+ <unix:sysctl_object id="object_{{{ rule_id }}}_runtime" version="1">
<unix:name>{{{ SYSCTLVAR }}}</unix:name>
</unix:sysctl_object>
{{% if SYSCTLVAL == "" %}}
- <unix:sysctl_state id="state_sysctl_runtime_{{{ SYSCTLID }}}" version="1">
+ <unix:sysctl_state id="state_{{{ rule_id }}}_runtime" version="1">
<unix:value datatype="{{{ DATATYPE }}}" operation="equals"
- var_ref="sysctl_{{{ SYSCTLID }}}_value"/>
+ var_ref="{{{ rule_id }}}_value"/>
</unix:sysctl_state>
- <external_variable id="sysctl_{{{ SYSCTLID }}}_value" version="1"
+ <external_variable id="{{{ rule_id }}}_value" version="1"
comment="External variable for {{{ SYSCTLVAR }}}" datatype="{{{ DATATYPE }}}"/>
{{%- else %}}
- <unix:sysctl_state id="state_sysctl_runtime_{{{ SYSCTLID }}}" version="1">
+ <unix:sysctl_state id="state_{{{ rule_id }}}_runtime" version="1">
{{% if OPERATION == "pattern match" %}}
<unix:value datatype="{{{ DATATYPE }}}"
operation="{{{ OPERATION }}}">{{{ SYSCTLVAL_REGEX }}}</unix:value>
@@ -100,46 +100,46 @@
{{%- if "S" in FLAGS -%}}
<def-group>
- <definition class="compliance" id="sysctl_static_{{{ SYSCTLID }}}" version="3">
+ <definition class="compliance" id="{{{ rule_id }}}_static" version="3">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system configuration.") }}}
<criteria operator="AND">
<criteria operator="OR">
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /etc/sysctl.conf"
- test_ref="test_static_sysctl_{{{ SYSCTLID }}}"/>
+ test_ref="test_{{{ rule_id }}}_static"/>
<!-- see sysctl.d(5) -->
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /etc/sysctl.d/*.conf"
- test_ref="test_static_etc_sysctld_{{{ SYSCTLID }}}"/>
+ test_ref="test_{{{ rule_id }}}_static_etc_sysctld"/>
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /run/sysctl.d/*.conf"
- test_ref="test_static_run_sysctld_{{{ SYSCTLID }}}"/>
+ test_ref="test_{{{ rule_id }}}_static_run_sysctld"/>
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /usr/lib/sysctl.d/*.conf"
- test_ref="test_static_usr_lib_sysctld_{{{ SYSCTLID }}}"/>
+ test_ref="test_{{{ rule_id }}}_static_usr_lib_sysctld"/>
{{% endif %}}
</criteria>
{{% if target_oval_version >= [5, 11] %}}
- <criterion comment="Check that {{{ SYSCTLID }}} is defined in only one file" test_ref="test_sysctl_{{{ SYSCTLID }}}_defined_in_one_file" />
+ <criterion comment="Check that {{{ SYSCTLID }}} is defined in only one file" test_ref="test_{{{ rule_id }}}_defined_in_one_file" />
{{% endif %}}
</criteria>
</definition>
- <ind:textfilecontent54_test id="test_static_sysctl_{{{ SYSCTLID }}}" version="1"
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static" version="1"
check="all" check_existence="all_exist"
comment="{{{ SYSCTLVAR }}} static configuration">
{{{ state_static_sysctld("sysctl") }}}
</ind:textfilecontent54_test>
- <ind:textfilecontent54_test id="test_static_etc_sysctld_{{{ SYSCTLID }}}" version="1" check="all"
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_etc_sysctld" version="1" check="all"
comment="{{{ SYSCTLVAR }}} static configuration in /etc/sysctl.d/*.conf">
{{{ state_static_sysctld("etc_sysctld") }}}
</ind:textfilecontent54_test>
- <ind:textfilecontent54_test id="test_static_run_sysctld_{{{ SYSCTLID }}}" version="1" check="all"
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_run_sysctld" version="1" check="all"
comment="{{{ SYSCTLVAR }}} static configuration in /run/sysctl.d/*.conf">
{{{ state_static_sysctld("run_sysctld") }}}
</ind:textfilecontent54_test>
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
- <ind:textfilecontent54_test id="test_static_usr_lib_sysctld_{{{ SYSCTLID }}}" version="1"
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_usr_lib_sysctld" version="1"
check="all"
comment="{{{ SYSCTLVAR }}} static configuration in /usr/lib/sysctl.d/*.conf">
{{{ state_static_sysctld("usr_lib_sysctld") }}}
@@ -148,79 +148,79 @@
{{% if target_oval_version >= [5, 11] %}}
<ind:variable_test check="all" check_existence="all_exist" comment="Check that only one file contains {{{ SYSCTLID }}}"
- id="test_sysctl_{{{ SYSCTLID }}}_defined_in_one_file" version="1">
- <ind:object object_ref="oject_sysctl_{{{ SYSCTLID }}}_defined_in_one_file" />
- <ind:state state_ref="state_sysctl_{{{ SYSCTLID }}}_defined_in_one_file" />
+ id="test_{{{ rule_id }}}_defined_in_one_file" version="1">
+ <ind:object object_ref="object_{{{ rule_id }}}_defined_in_one_file" />
+ <ind:state state_ref="state_{{{ rule_id }}}_defined_in_one_file" />
</ind:variable_test>
- <ind:variable_object id="oject_sysctl_{{{ SYSCTLID }}}_defined_in_one_file" version="1">
- <ind:var_ref>local_var_unique_sysctl_{{{ SYSCTLID }}}_counter</ind:var_ref>
+ <ind:variable_object id="object_{{{ rule_id }}}_defined_in_one_file" version="1">
+ <ind:var_ref>local_var_{{{ rule_id }}}_counter</ind:var_ref>
</ind:variable_object>
- <ind:variable_state id="state_sysctl_{{{ SYSCTLID }}}_defined_in_one_file" version="1">
+ <ind:variable_state id="state_{{{ rule_id }}}_defined_in_one_file" version="1">
<ind:value operation="equals" datatype="int">1</ind:value>
</ind:variable_state>
- <local_variable comment="Count unique sysctls" datatype="int" id="local_var_unique_sysctl_{{{ SYSCTLID }}}_counter" version="1">
+ <local_variable comment="Count unique sysctls" datatype="int" id="local_var_{{{ rule_id }}}_counter" version="1">
<count>
<unique>
- <object_component object_ref="object_static_set_sysctls_{{{ SYSCTLID }}}" item_field="filepath" />
+ <object_component object_ref="object_{{{ rule_id }}}_static_set_sysctls" item_field="filepath" />
</unique>
</count>
</local_variable>
- <ind:textfilecontent54_object id="object_static_set_sysctls_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_{{{ rule_id }}}_static_set_sysctls" version="1">
<set>
- <object_reference>object_static_set_unfiltered_sysctls_{{{ SYSCTLID }}}</object_reference>
- <filter action="exclude">state_{{{ SYSCTLID }}}_filepath_is_symlink</filter>
+ <object_reference>object_{{{ rule_id }}}_static_set_sysctls_unfiltered</object_reference>
+ <filter action="exclude">state_{{{ rule_id }}}_filepath_is_symlink</filter>
</set>
</ind:textfilecontent54_object>
- <ind:textfilecontent54_state id="state_{{{ SYSCTLID }}}_filepath_is_symlink" version="1">
- <ind:filepath operation="equals" var_check="at least one" var_ref="local_var_safe_symlinks_{{{ SYSCTLID }}}" datatype="string" />
+ <ind:textfilecontent54_state id="state_{{{ rule_id }}}_filepath_is_symlink" version="1">
+ <ind:filepath operation="equals" var_check="at least one" var_ref="local_var_{{{ rule_id }}}_safe_symlinks" datatype="string" />
</ind:textfilecontent54_state>
- <!-- <no simlink handling> -->
+ <!-- <no symlink handling> -->
<!-- We craft a variable with blank string to combine with the symlink paths found.
This ultimately avoids referencing a variable with "no values",
we reference a variable with a blank string -->
- <local_variable comment="Unique list of symlink conf files" datatype="string" id="local_var_safe_symlinks_{{{ SYSCTLID }}}" version="1">
+ <local_variable comment="Unique list of symlink conf files" datatype="string" id="local_var_{{{ rule_id }}}_safe_symlinks" version="1">
<unique>
- <object_component object_ref="var_object_symlink_{{{ SYSCTLID }}}" item_field="value" />
+ <object_component object_ref="var_object_symlink_{{{ rule_id }}}" item_field="value" />
</unique>
</local_variable>
- <ind:variable_object id="var_object_symlink_{{{ SYSCTLID }}}" comment="combine the blank string with symlink paths found" version="1">
+ <ind:variable_object id="var_object_symlink_{{{ rule_id }}}" comment="combine the blank string with symlink paths found" version="1">
<set>
- <object_reference>var_obj_symlink_{{{ SYSCTLID }}}</object_reference>
- <object_reference>var_obj_blank_{{{ SYSCTLID }}}</object_reference>
+ <object_reference>var_obj_symlink_{{{ rule_id }}}</object_reference>
+ <object_reference>var_obj_blank_{{{ rule_id }}}</object_reference>
</set>
</ind:variable_object>
- <ind:variable_object id="var_obj_blank_{{{ SYSCTLID }}}" comment="variable object of the blank string" version="1">
- <ind:var_ref>local_var_blank_path_{{{ SYSCTLID }}}</ind:var_ref>
+ <ind:variable_object id="var_obj_blank_{{{ rule_id }}}" comment="variable object of the blank string" version="1">
+ <ind:var_ref>local_var_blank_path_{{{ rule_id }}}</ind:var_ref>
</ind:variable_object>
- <local_variable comment="Blank string" datatype="string" id="local_var_blank_path_{{{ SYSCTLID }}}" version="1">
+ <local_variable comment="Blank string" datatype="string" id="local_var_blank_path_{{{ rule_id }}}" version="1">
<literal_component datatype="string"></literal_component>
</local_variable>
- <ind:variable_object id="var_obj_symlink_{{{ SYSCTLID }}}" comment="variable object of the symlinks found" version="1">
- <ind:var_ref>local_var_symlinks_{{{ SYSCTLID }}}</ind:var_ref>
+ <ind:variable_object id="var_obj_symlink_{{{ rule_id }}}" comment="variable object of the symlinks found" version="1">
+ <ind:var_ref>local_var_symlinks_{{{ rule_id }}}</ind:var_ref>
</ind:variable_object>
- <!-- </no simlink handling> -->
+ <!-- </no symlink handling> -->
- <local_variable comment="Unique list of symlink conf files" datatype="string" id="local_var_symlinks_{{{ SYSCTLID }}}" version="1">
+ <local_variable comment="Unique list of symlink conf files" datatype="string" id="local_var_symlinks_{{{ rule_id }}}" version="1">
<unique>
- <object_component object_ref="object_{{{ SYSCTLID }}}_symlinks" item_field="filepath" />
+ <object_component object_ref="object_{{{ rule_id }}}_symlinks" item_field="filepath" />
</unique>
</local_variable>
<!-- "pattern match" doesn't seem to work with symlink_object, not sure if a bug or not.
Workaround by querying for all conf files found -->
- <unix:symlink_object comment="Symlinks referencing files in default dirs" id="object_{{{ SYSCTLID }}}_symlinks" version="1">
- <unix:filepath operation="equals" var_ref="local_var_conf_files_{{{ SYSCTLID }}}" />
- <filter action="exclude">state_symlink_points_outside_usual_dirs_{{{ SYSCTLID }}}</filter>
+ <unix:symlink_object comment="Symlinks referencing files in default dirs" id="object_{{{ rule_id }}}_symlinks" version="1">
+ <unix:filepath operation="equals" var_ref="local_var_conf_files_{{{ rule_id }}}" />
+ <filter action="exclude">state_symlink_points_outside_usual_dirs_{{{ rule_id }}}</filter>
</unix:symlink_object>
<!-- The state matches symlinks that don't point to the default dirs, i.e. paths that are not:
@@ -228,59 +228,59 @@
^/etc/sysctl.d/.*$
^/run/sysctl.d/.*$
^/usr/lib/sysctl.d/.*$ -->
- <unix:symlink_state comment="State that matches symlinks referencing files not in the default dirs" id="state_symlink_points_outside_usual_dirs_{{{ SYSCTLID }}}" version="1">
+ <unix:symlink_state comment="State that matches symlinks referencing files not in the default dirs" id="state_symlink_points_outside_usual_dirs_{{{ rule_id }}}" version="1">
<unix:canonical_path operation="pattern match">^(?!(\/etc\/sysctl\.conf$|(\/etc|\/run|\/usr\/lib)\/sysctl\.d\/)).*$</unix:canonical_path>
</unix:symlink_state>
{{% endif %}}
- <local_variable comment="List of conf files" datatype="string" id="local_var_conf_files_{{{ SYSCTLID }}}" version="1">
- <object_component object_ref="object_static_set_unfiltered_sysctls_{{{ SYSCTLID }}}" item_field="filepath" />
+ <local_variable comment="List of conf files" datatype="string" id="local_var_conf_files_{{{ rule_id }}}" version="1">
+ <object_component object_ref="object_{{{ rule_id }}}_static_set_sysctls_unfiltered" item_field="filepath" />
</local_variable>
<!-- Avoid directly referencing a possibly empty collection, one empty collection will cause the
variable to have no value even when there are valid objects. -->
- <ind:textfilecontent54_object id="object_static_set_unfiltered_sysctls_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_{{{ rule_id }}}_static_set_sysctls_unfiltered" version="1">
<set>
- <object_reference>object_static_etc_sysctls_{{{ SYSCTLID }}}</object_reference>
- <object_reference>object_static_run_usr_sysctls_{{{ SYSCTLID }}}</object_reference>
+ <object_reference>object_static_etc_sysctls_{{{ rule_id }}}</object_reference>
+ <object_reference>object_static_run_usr_sysctls_{{{ rule_id }}}</object_reference>
</set>
</ind:textfilecontent54_object>
- <ind:textfilecontent54_object id="object_static_etc_sysctls_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_static_etc_sysctls_{{{ rule_id }}}" version="1">
<set>
- <object_reference>object_static_sysctl_{{{ SYSCTLID }}}</object_reference>
- <object_reference>object_static_etc_sysctld_{{{ SYSCTLID }}}</object_reference>
+ <object_reference>object_static_sysctl_{{{ rule_id }}}</object_reference>
+ <object_reference>object_static_etc_sysctld_{{{ rule_id }}}</object_reference>
</set>
</ind:textfilecontent54_object>
- <ind:textfilecontent54_object id="object_static_run_usr_sysctls_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_static_run_usr_sysctls_{{{ rule_id }}}" version="1">
<set>
- <object_reference>object_static_run_sysctld_{{{ SYSCTLID }}}</object_reference>
+ <object_reference>object_static_run_sysctld_{{{ rule_id }}}</object_reference>
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
- <object_reference>object_static_usr_lib_sysctld_{{{ SYSCTLID }}}</object_reference>
+ <object_reference>object_static_usr_lib_sysctld_{{{ rule_id }}}</object_reference>
{{% endif %}}
</set>
</ind:textfilecontent54_object>
- <ind:textfilecontent54_object id="object_static_sysctl_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_static_sysctl_{{{ rule_id }}}" version="1">
<ind:filepath>/etc/sysctl.conf</ind:filepath>
{{{ sysctl_match() }}}
</ind:textfilecontent54_object>
- <ind:textfilecontent54_object id="object_static_etc_sysctld_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_static_etc_sysctld_{{{ rule_id }}}" version="1">
<ind:path>/etc/sysctl.d</ind:path>
<ind:filename operation="pattern match">^.*\.conf$</ind:filename>
{{{ sysctl_match() }}}
</ind:textfilecontent54_object>
- <ind:textfilecontent54_object id="object_static_run_sysctld_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_static_run_sysctld_{{{ rule_id }}}" version="1">
<ind:path>/run/sysctl.d</ind:path>
<ind:filename operation="pattern match">^.*\.conf$</ind:filename>
{{{ sysctl_match() }}}
</ind:textfilecontent54_object>
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
- <ind:textfilecontent54_object id="object_static_usr_lib_sysctld_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_object id="object_static_usr_lib_sysctld_{{{ rule_id }}}" version="1">
<ind:path>/usr/lib/sysctl.d</ind:path>
<ind:filename operation="pattern match">^.*\.conf$</ind:filename>
{{{ sysctl_match() }}}
@@ -288,15 +288,15 @@
{{% endif %}}
{{% if SYSCTLVAL == "" %}}
- <ind:textfilecontent54_state id="state_static_sysctld_{{{ SYSCTLID }}}" version="1">
- <ind:subexpression operation="{{{ OPERATION }}}" var_ref="sysctl_{{{ SYSCTLID }}}_value"
+ <ind:textfilecontent54_state id="state_static_sysctld_{{{ rule_id }}}" version="1">
+ <ind:subexpression operation="{{{ OPERATION }}}" var_ref="{{{ rule_id }}}_value"
datatype="{{{ DATATYPE }}}" />
</ind:textfilecontent54_state>
- <external_variable id="sysctl_{{{ SYSCTLID }}}_value" version="1"
+ <external_variable id="{{{ rule_id }}}_value" version="1"
comment="External variable for {{{ SYSCTLVAR }}}" datatype="{{{ DATATYPE }}}"/>
{{% else %}}
- <ind:textfilecontent54_state id="state_static_sysctld_{{{ SYSCTLID }}}" version="1">
+ <ind:textfilecontent54_state id="state_static_sysctld_{{{ rule_id }}}" version="1">
{{% if OPERATION == "pattern match" %}}
<ind:subexpression operation="{{{ OPERATION }}}" datatype="{{{ DATATYPE }}}">{{{ SYSCTLVAL_REGEX }}}</ind:subexpression>
{{% else %}}
From ee5d91aaf33504e56b6959c17c8ebc6006a17a5f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 10:16:45 +0200
Subject: [PATCH 03/23] Use a list of values in sysctl template
This patch adds an ability to use a list of values instead of a single
value in the sysctlval parameter of the sysctl template. This is useful
for situations when we want to create a rule that passes for multiple
different sysctl values. This commit modifies the OVAL for the runtime
configuration. The runtime configuration will be allowed to be any of
the values in the list. There is an OR relation between the values. In
fact, this is a first step to enable multiple values in the sysctlval
parameter in the sysctl template, because we will also need to check the
static configuration, which is not done in this commit.
---
shared/templates/sysctl/oval.template | 32 +++++++++++++++++++++++++++
shared/templates/sysctl/template.py | 24 ++++++++++++--------
2 files changed, 47 insertions(+), 9 deletions(-)
diff --git a/shared/templates/sysctl/oval.template b/shared/templates/sysctl/oval.template
index 52671c06402..b73ccc94f72 100644
--- a/shared/templates/sysctl/oval.template
+++ b/shared/templates/sysctl/oval.template
@@ -1,5 +1,7 @@
{{%- if SYSCTLVAL == "" %}}
{{%- set COMMENT_VALUE="the appropriate value" %}}
+{{%- elif SYSCTLVAL is sequence %}}
+{{%- set COMMENT_VALUE = SYSCTLVAL | join(" or " ) %}}
{{%- else %}}
{{%- set COMMENT_VALUE=SYSCTLVAL %}}
{{%- endif %}}
@@ -60,21 +62,43 @@
<def-group>
<definition class="compliance" id="{{{ rule_id }}}_runtime" version="3">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system runtime.") }}}
+{{% if SYSCTLVAL is string %}}
<criteria operator="AND">
<criterion comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}}"
test_ref="test_{{{ rule_id }}}_runtime"/>
</criteria>
+{{% elif SYSCTLVAL is sequence %}}
+ <criteria operator="OR">
+{{% for x in SYSCTLVAL %}}
+ <criterion comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ x }}}"
+ test_ref="test_{{{ rule_id }}}_runtime_{{{ x }}}"/>
+{{% endfor %}}
+ </criteria>
+{{% endif %}}
</definition>
+
+{{% if SYSCTLVAL is string %}}
<unix:sysctl_test id="test_{{{ rule_id }}}_runtime" version="1"
comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}}"
check="all" check_existence="all_exist">
<unix:object object_ref="object_{{{ rule_id }}}_runtime"/>
<unix:state state_ref="state_{{{ rule_id }}}_runtime"/>
</unix:sysctl_test>
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+ <unix:sysctl_test id="test_{{{ rule_id }}}_runtime_{{{ x }}}" version="1"
+ comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ x }}}"
+ check="all" check_existence="all_exist">
+ <unix:object object_ref="object_{{{ rule_id }}}_runtime"/>
+ <unix:state state_ref="state_{{{ rule_id }}}_runtime_{{{ x }}}" />
+ </unix:sysctl_test>
+{{% endfor %}}
+{{% endif %}}
<unix:sysctl_object id="object_{{{ rule_id }}}_runtime" version="1">
<unix:name>{{{ SYSCTLVAR }}}</unix:name>
</unix:sysctl_object>
+{{% if SYSCTLVAL is string %}}
{{% if SYSCTLVAL == "" %}}
<unix:sysctl_state id="state_{{{ rule_id }}}_runtime" version="1">
<unix:value datatype="{{{ DATATYPE }}}" operation="equals"
@@ -94,6 +118,14 @@
{{% endif %}}
</unix:sysctl_state>
{{%- endif %}}
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+ <unix:sysctl_state id="state_{{{ rule_id }}}_runtime_{{{ x }}}" version="1">
+ <unix:value datatype="{{{ DATATYPE }}}"
+ operation="{{{ OPERATION }}}">{{{ x }}}</unix:value>
+ </unix:sysctl_state>
+{{% endfor %}}
+{{% endif %}}
</def-group>
{{%- endif -%}}
diff --git a/shared/templates/sysctl/template.py b/shared/templates/sysctl/template.py
index fa981a9dce9..c62591357c0 100644
--- a/shared/templates/sysctl/template.py
+++ b/shared/templates/sysctl/template.py
@@ -12,6 +12,13 @@ def preprocess(data, lang):
if "operation" not in data:
data["operation"] = "equals"
+ if data["datatype"] not in ["string", "int"]:
+ raise ValueError(
+ "Test scenarios for data type '{0}' are not implemented yet.\n"
+ "Please check if rule '{1}' has correct data type and edit "
+ "{2} to add tests for it.".format(
+ data["datatype"], data["_rule_id"], __file__))
+
# Configure data for test scenarios
if data["sysctlval"] == "":
if data["datatype"] == "int":
@@ -20,20 +27,19 @@ def preprocess(data, lang):
elif data["datatype"] == "string":
data["sysctl_correct_value"] = "correct_value"
data["sysctl_wrong_value"] = "wrong_value"
- else:
+ elif isinstance(data["sysctlval"], list):
+ if len(data["sysctlval"]) == 0:
raise ValueError(
- "Test scenarios for data type '{0}' are not implemented yet.\n"
- "Please check if rule '{1}' has correct data type and edit "
- "{2} to add tests for it.".format(data["datatype"], data["_rule_id"], __file__))
+ "The sysctlval parameter of {0} is an empty list".format(data["_rule_id"]))
+ data["sysctl_correct_value"] = data["sysctlval"][0]
+ if data["datatype"] == "int":
+ data["sysctl_wrong_value"] = "1" + data["sysctlval"][0]
+ elif data["datatype"] == "string":
+ data["sysctl_wrong_value"] = "wrong_value"
else:
data["sysctl_correct_value"] = data["sysctlval"]
if data["datatype"] == "int":
data["sysctl_wrong_value"] = "1" + data["sysctlval"]
elif data["datatype"] == "string":
data["sysctl_wrong_value"] = "wrong_value"
- else:
- raise ValueError(
- "Test scenarios for data type '{0}' are not implemented yet.\n"
- "Please check if rule '{1}' has correct data type and edit "
- "{2} to add tests for it.".format(data["datatype"], data["_rule_id"], __file__))
return data
From c50304234dfac1dcd74b3056c978eec2c097216d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 10:47:51 +0200
Subject: [PATCH 04/23] Move check unrelated to the test scenarios
The check for an mepty list is unrelated to the test scenarios,
rather is a generic check to avoid problems during the build.
Therefore, it shouldn't be inside code block that is handling
data for test scenarios, but can be extracted to a sooner position.
---
shared/templates/sysctl/template.py | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/shared/templates/sysctl/template.py b/shared/templates/sysctl/template.py
index c62591357c0..421e42c6ca1 100644
--- a/shared/templates/sysctl/template.py
+++ b/shared/templates/sysctl/template.py
@@ -11,7 +11,12 @@ def preprocess(data, lang):
data["flags"] = "SR" + ipv6_flag
if "operation" not in data:
data["operation"] = "equals"
+ if isinstance(data["sysctlval"], list) and len(data["sysctlval"]) == 0:
+ raise ValueError(
+ "The sysctlval parameter of {0} is an empty list".format(
+ data["_rule_id"]))
+ # Configure data for test scenarios
if data["datatype"] not in ["string", "int"]:
raise ValueError(
"Test scenarios for data type '{0}' are not implemented yet.\n"
@@ -19,7 +24,6 @@ def preprocess(data, lang):
"{2} to add tests for it.".format(
data["datatype"], data["_rule_id"], __file__))
- # Configure data for test scenarios
if data["sysctlval"] == "":
if data["datatype"] == "int":
data["sysctl_correct_value"] = "0"
@@ -28,9 +32,6 @@ def preprocess(data, lang):
data["sysctl_correct_value"] = "correct_value"
data["sysctl_wrong_value"] = "wrong_value"
elif isinstance(data["sysctlval"], list):
- if len(data["sysctlval"]) == 0:
- raise ValueError(
- "The sysctlval parameter of {0} is an empty list".format(data["_rule_id"]))
data["sysctl_correct_value"] = data["sysctlval"][0]
if data["datatype"] == "int":
data["sysctl_wrong_value"] = "1" + data["sysctlval"][0]
From eb1fe4f349e2dcadd9b870e074e679383601be62 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 11:57:50 +0200
Subject: [PATCH 05/23] Allow multiple values in sysctl static configuration
This extends the OVAL checks for sysctl static configuration
to enable a list of values instead of a single value in the
sysctlval parameter of the sysctl template. The template
will generate OVAL tests for each value in the sysctlval
list.
---
shared/templates/sysctl/oval.template | 56 +++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/shared/templates/sysctl/oval.template b/shared/templates/sysctl/oval.template
index b73ccc94f72..4e1bf3cfce3 100644
--- a/shared/templates/sysctl/oval.template
+++ b/shared/templates/sysctl/oval.template
@@ -136,6 +136,7 @@
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system configuration.") }}}
<criteria operator="AND">
<criteria operator="OR">
+{{% if SYSCTLVAL is string %}}
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /etc/sysctl.conf"
test_ref="test_{{{ rule_id }}}_static"/>
<!-- see sysctl.d(5) -->
@@ -146,6 +147,21 @@
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /usr/lib/sysctl.d/*.conf"
test_ref="test_{{{ rule_id }}}_static_usr_lib_sysctld"/>
+{{% endif %}}
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+ <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /etc/sysctl.conf"
+ test_ref="test_{{{ rule_id }}}_static_{{{ x }}}"/>
+ <!-- see sysctl.d(5) -->
+ <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /etc/sysctl.d/*.conf"
+ test_ref="test_{{{ rule_id }}}_static_{{{ x }}}_etc_sysctld"/>
+ <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /run/sysctl.d/*.conf"
+ test_ref="test_{{{ rule_id }}}_static_{{{ x }}}_run_sysctld"/>
+{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
+ <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /usr/lib/sysctl.d/*.conf"
+ test_ref="test_{{{ rule_id }}}_static_{{{ x }}}_usr_lib_sysctld"/>
+{{% endif %}}
+{{% endfor %}}
{{% endif %}}
</criteria>
{{% if target_oval_version >= [5, 11] %}}
@@ -154,6 +170,7 @@
</criteria>
</definition>
+{{% if SYSCTLVAL is string %}}
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_static" version="1"
check="all" check_existence="all_exist"
comment="{{{ SYSCTLVAR }}} static configuration">
@@ -177,6 +194,37 @@
{{{ state_static_sysctld("usr_lib_sysctld") }}}
</ind:textfilecontent54_test>
{{% endif %}}
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}" version="1"
+ check="all" check_existence="all_exist"
+ comment="{{{ SYSCTLVAR }}} static configuration">
+ <ind:object object_ref="object_static_sysctl_{{{ rule_id }}}"/>
+ <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
+ </ind:textfilecontent54_test>
+
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}_etc_sysctld" version="1" check="all"
+ comment="{{{ SYSCTLVAR }}} static configuration in /etc/sysctl.d/*.conf">
+ <ind:object object_ref="object_static_etc_sysctld_{{{ rule_id }}}"/>
+ <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
+ </ind:textfilecontent54_test>
+
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}_run_sysctld" version="1" check="all"
+ comment="{{{ SYSCTLVAR }}} static configuration in /run/sysctl.d/*.conf">
+ <ind:object object_ref="object_static_run_sysctld_{{{ rule_id }}}"/>
+ <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
+ </ind:textfilecontent54_test>
+
+{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}_usr_lib_sysctld" version="1"
+ check="all"
+ comment="{{{ SYSCTLVAR }}} static configuration in /usr/lib/sysctl.d/*.conf">
+ <ind:object object_ref="object_static_usr_lib_sysctld_{{{ rule_id }}}"/>
+ <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
+ </ind:textfilecontent54_test>
+{{% endif %}}
+{{% endfor %}}
+{{% endif %}}
{{% if target_oval_version >= [5, 11] %}}
<ind:variable_test check="all" check_existence="all_exist" comment="Check that only one file contains {{{ SYSCTLID }}}"
@@ -318,6 +366,7 @@
{{{ sysctl_match() }}}
</ind:textfilecontent54_object>
{{% endif %}}
+{{% if SYSCTLVAL is string %}}
{{% if SYSCTLVAL == "" %}}
<ind:textfilecontent54_state id="state_static_sysctld_{{{ rule_id }}}" version="1">
@@ -336,5 +385,12 @@
{{% endif %}}
</ind:textfilecontent54_state>
{{% endif %}}
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+ <ind:textfilecontent54_state id="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}" version="1">
+ <ind:subexpression operation="{{{ OPERATION }}}" datatype="{{{ DATATYPE }}}">{{{ x }}}</ind:subexpression>
+ </ind:textfilecontent54_state>
+{{% endfor %}}
+{{% endif %}}
</def-group>
{{%- endif -%}}
From 93d496fb8dda6c47707e27c0b2cad15616261f27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 14:55:28 +0200
Subject: [PATCH 06/23] Add option to allow system default
Introduce new template option `missing_static_pass` to the
systemctl template. If this option is set to `"true"` in rule.yml
the OVAL will be generated in a way that the check will pass if
there is no sysctl static configuration option in the watched sysctl
configuration files. In other words, the OVAL check will pass if
the system default isn't overridden.
---
shared/templates/sysctl/oval.template | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/shared/templates/sysctl/oval.template b/shared/templates/sysctl/oval.template
index 4e1bf3cfce3..1719a59f9c7 100644
--- a/shared/templates/sysctl/oval.template
+++ b/shared/templates/sysctl/oval.template
@@ -134,6 +134,9 @@
<def-group>
<definition class="compliance" id="{{{ rule_id }}}_static" version="3">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system configuration.") }}}
+{{% if MISSING_STATIC_PASS == "true" %}}
+ <criteria operator="OR">
+{{% endif %}}
<criteria operator="AND">
<criteria operator="OR">
{{% if SYSCTLVAL is string %}}
@@ -168,8 +171,20 @@
<criterion comment="Check that {{{ SYSCTLID }}} is defined in only one file" test_ref="test_{{{ rule_id }}}_defined_in_one_file" />
{{% endif %}}
</criteria>
+{{% if MISSING_STATIC_PASS == "true" %}}
+ <criterion comment="Check that {{{ SYSCTLID }}} is not defined in any file" test_ref="test_{{{ rule_id }}}_not_defined" />
+ </criteria>
+{{% endif %}}
</definition>
+{{% if MISSING_STATIC_PASS == "true" %}}
+ <ind:textfilecontent54_test id="test_{{{ rule_id }}}_not_defined" version="1"
+ check="all" check_existence="none_exist"
+ comment="{{{ SYSCTLVAR }}} static configuration">
+ <ind:object object_ref="object_{{{ rule_id }}}_static_set_sysctls" />
+ </ind:textfilecontent54_test>
+{{% endif %}}
+
{{% if SYSCTLVAL is string %}}
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_static" version="1"
check="all" check_existence="all_exist"
From 97dca34b717621d5fbbdfdab459ac087f20d1e4b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 17:02:35 +0200
Subject: [PATCH 07/23] Accept multiple values in the sysctl remediation
A new parameter sysctlval_remediate is introduced to the sysctl
template. This allows to choose which of the multiple values in
the sysctl list will be used in the Bash and Ansible remediations.
---
docs/templates/template_reference.md | 8 ++++++++
shared/templates/sysctl/ansible.template | 6 +++---
shared/templates/sysctl/bash.template | 10 +++++-----
shared/templates/sysctl/template.py | 9 +++++++++
4 files changed, 25 insertions(+), 8 deletions(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index a439e3dca94..5785f1d453f 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -818,6 +818,14 @@ The selected value can be changed in the profile (consult the actual variable fo
- **sysctlval** - value of the sysctl value, eg. `'1'`. If this
parameter is not specified, XCCDF Value is used instead.
+ - **sysctlval_remediate** - the value that will be used in remediations.
+ If **sysctlval_remediate** is not specified, the template will use the
+ value of the **sysctlval** parameter in the remediations.
+ This parameter is mandatory when the **sysctlval** parameter is a list
+ because we need to know which of the values in the list the system
+ should be remedied to. When the **sysctlval** parameter is not a list
+ this parameter is optional.
+
- **operation** - operation used for comparison of collected object
with **sysctlval**. Default value: `equals`.
diff --git a/shared/templates/sysctl/ansible.template b/shared/templates/sysctl/ansible.template
index c13bb6637fe..7724db5e5ff 100644
--- a/shared/templates/sysctl/ansible.template
+++ b/shared/templates/sysctl/ansible.template
@@ -21,7 +21,7 @@
replace: '#{{{ SYSCTLVAR }}}'
loop: "{{ find_sysctl_d.files }}"
-{{%- if SYSCTLVAL == "" %}}
+{{%- if SYSCTLVAL_REMEDIATE == "" %}}
- (xccdf-var sysctl_{{{ SYSCTLID }}}_value)
- name: Ensure sysctl {{{ SYSCTLVAR }}} is set
@@ -29,10 +29,10 @@
name: "{{{ SYSCTLVAR }}}"
value: "{{ sysctl_{{{ SYSCTLID }}}_value }}"
{{%- else %}}
-- name: Ensure sysctl {{{ SYSCTLVAR }}} is set to {{{ SYSCTLVAL }}}
+- name: Ensure sysctl {{{ SYSCTLVAR }}} is set to {{{ SYSCTLVAL_REMEDIATE }}}
sysctl:
name: "{{{ SYSCTLVAR }}}"
- value: "{{{ SYSCTLVAL }}}"
+ value: "{{{ SYSCTLVAL_REMEDIATE }}}"
{{%- endif %}}
state: present
reload: yes
diff --git a/shared/templates/sysctl/bash.template b/shared/templates/sysctl/bash.template
index d67a59c3886..63948bd5a26 100644
--- a/shared/templates/sysctl/bash.template
+++ b/shared/templates/sysctl/bash.template
@@ -20,7 +20,7 @@ for f in /etc/sysctl.d/*.conf /run/sysctl.d/*.conf; do
fi
done
-{{%- if SYSCTLVAL == "" %}}
+{{%- if SYSCTLVAL_REMEDIATE == "" %}}
{{{ bash_instantiate_variables("sysctl_" + SYSCTLID + "_value") }}}
#
@@ -38,11 +38,11 @@ done
#
# Set runtime for {{{ SYSCTLVAR }}}
#
-/sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="{{{ SYSCTLVAL }}}"
+/sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="{{{ SYSCTLVAL_REMEDIATE }}}"
#
-# If {{{ SYSCTLVAR }}} present in /etc/sysctl.conf, change value to "{{{ SYSCTLVAL }}}"
-# else, add "{{{ SYSCTLVAR }}} = {{{ SYSCTLVAL }}}" to /etc/sysctl.conf
+# If {{{ SYSCTLVAR }}} present in /etc/sysctl.conf, change value to "{{{ SYSCTLVAL_REMEDIATE }}}"
+# else, add "{{{ SYSCTLVAR }}} = {{{ SYSCTLVAL_REMEDIATE }}}" to /etc/sysctl.conf
#
-{{{ bash_replace_or_append('/etc/sysctl.conf', '^' + SYSCTLVAR , SYSCTLVAL ) }}}
+{{{ bash_replace_or_append('/etc/sysctl.conf', '^' + SYSCTLVAR , SYSCTLVAL_REMEDIATE ) }}}
{{%- endif %}}
diff --git a/shared/templates/sysctl/template.py b/shared/templates/sysctl/template.py
index 421e42c6ca1..2574d5d42b0 100644
--- a/shared/templates/sysctl/template.py
+++ b/shared/templates/sysctl/template.py
@@ -16,6 +16,15 @@ def preprocess(data, lang):
"The sysctlval parameter of {0} is an empty list".format(
data["_rule_id"]))
+ if not data.get("sysctlval_remediate"):
+ if isinstance(data["sysctlval"], list):
+ raise ValueError(
+ "Problem with rule {0}: the 'sysctlval' parameter is a list "
+ "but we are missing the 'sysctlval_remediate' parameter, so "
+ "we don't know how to generate remediation content.".format(
+ data["_rule_id"]))
+ data["sysctlval_remediate"] = data["sysctlval"]
+
# Configure data for test scenarios
if data["datatype"] not in ["string", "int"]:
raise ValueError(
From 8a3ba3f74760b360e179da221acf7bb06f4bdc12 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 17:10:16 +0200
Subject: [PATCH 08/23] Introduce new rule
sysctl_kernel_unprivileged_bpf_disabled_accept_default
This rule is very similar to the existing rule
sysctl_kernel_unprivileged_bpf_disabled, but it allows the sysctl
setting kernel.unprivileged_bpf_disabled to be either 1 or 2. Also, the
rule will pass when the explicit configuration isn't present, allowing
to honor the system's default value which is 2. The goal of this rule is
to prevent unnecessary modification of the RHEL system default value
while still checking for the secure configuration.
See the explanation in
https://bugzilla.redhat.com/show_bug.cgi?id=2081728:
sysctl_kernel_unprivileged_bpf_disabled sets the
kernel.unprivileged_bpf_disabled value to 1. However, on RHEL 9 the
kernel supports new value 2 which per
https://www.kernel.org/doc/html/latest/admin-guide/sysctl/kernel.html#unprivileged-bpf-disabled
makes it for a privileged admin to re-enable unprivileged BPF. The value
2 is also the RHEL 9 default. So the current
sysctl_kernel_unprivileged_bpf_disabled rule unnecessarily modifies
the RHEL 9 default.
---
.../rule.yml | 82 +++++++++++++++++++
shared/references/cce-redhat-avail.txt | 1 -
2 files changed, 82 insertions(+), 1 deletion(-)
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
new file mode 100644
index 00000000000..f45769dd2d0
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -0,0 +1,82 @@
+documentation_complete: true
+
+prodtype: rhel9
+
+title: 'Disable Access to Network bpf() Syscall From Unprivileged Processes'
+
+description: |-
+ To prevent unprivileged processes from using the <code>bpf()</code> syscall
+ the <code>kernel.unprivileged_bpf_disabled</code> kernel parameter must
+ be set to <code>1</code> or <code>2</code>.
+
+ Writing <code>1</code> to this entry will disable unprivileged calls to <code>bpf()</code>; once
+ disabled, calling <code>bpf()</code> without <code>CAP_SYS_ADMIN</code> or <code>CAP_BPF</code> will return <code>-EPERM</code>.
+ Once set to <code>1</code>, this can't be cleared from the running kernel anymore.
+
+ Writing <code>2</code> to this entry will also disable unprivileged calls to <code>bpf()</code>,
+ however, an admin can still change this setting later on, if needed, by
+ writing <code>0</code> or <code>1</code> to this entry.
+
+ {{{ describe_sysctl_option_value(sysctl="kernel.unprivileged_bpf_disabled", value="1") }}}
+
+rationale: |-
+ Loading and accessing the packet filters programs and maps using the bpf()
+ syscall has the potential of revealing sensitive information about the kernel state.
+
+severity: medium
+
+identifiers:
+ cce@rhel9: CCE-87712-6
+
+references:
+ disa: CCI-000366
+ nist: AC-6,SC-7(10)
+ ospp: FMT_SMF_EXT.1
+ srg: SRG-OS-000132-GPOS-00067,SRG-OS-000480-GPOS-00227
+ stigid@ol8: OL08-00-040281
+ stigid@rhel8: RHEL-08-040281
+
+ocil: |-
+ The runtime status of the <code>kernel.unprivileged_bpf_disabled</code>
+ kernel parameter can be queried by running the following command:
+ <pre>$ sysctl kernel.unprivileged_bpf_disabled</pre>
+ The output of the command should indicate either:
+ kernel.unprivileged_bpf_disabled = 1
+ or:
+ kernel.unprivileged_bpf_disabled = 2
+ The output of the command should not indicate:
+ kernel.unprivileged_bpf_disabled = 0
+
+ The preferable way how to assure the runtime compliance is to have
+ correct persistent configuration, and rebooting the system.
+
+ The persistent kernel parameter configuration is performed by specifying the appropriate
+ assignment in any file located in the <pre>/etc/sysctl.d</pre> directory.
+ Verify that there is not any existing incorrect configuration by executing the following command:
+ <pre>$ grep -r '^\s*{{{ sysctl }}}\s*=' /etc/sysctl.conf /etc/sysctl.d</pre>
+ The command should not find any assignments other than:
+ kernel.unprivileged_bpf_disabled = 1
+ or:
+ kernel.unprivileged_bpf_disabled = 2
+
+ Duplicate assignments are not allowed. Empty output is allowed, because the system default is 2.
+
+ocil_clause: "the kernel.unprivileged_bpf_disabled is not set to 1 or 2 or is configured to be 0"
+
+fixtext: |-
+ Configure {{{ full_name }}} to prevent privilege escalation thru the kernel by disabling access to the bpf syscall.
+
+srg_requirement: '{{{ full_name }}} must disable access to network bpf syscall from unprivileged processes.'
+
+platform: machine
+
+template:
+ name: sysctl
+ vars:
+ sysctlvar: kernel.unprivileged_bpf_disabled
+ sysctlval:
+ - '1'
+ - '2'
+ sysctlval_remediate: "2"
+ missing_static_pass: "true"
+ datatype: int
diff --git a/shared/references/cce-redhat-avail.txt b/shared/references/cce-redhat-avail.txt
index 914233f06bf..2c2cf12cafe 100644
--- a/shared/references/cce-redhat-avail.txt
+++ b/shared/references/cce-redhat-avail.txt
@@ -1435,7 +1435,6 @@ CCE-87708-4
CCE-87709-2
CCE-87710-0
CCE-87711-8
-CCE-87712-6
CCE-87713-4
CCE-87714-2
CCE-87715-9
From 0327b48990c2cf35aeff8adf63a2102378e43c54 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 13 Jul 2022 17:21:50 +0200
Subject: [PATCH 09/23] Add test scenarios for rule
sysctl_kernel_unprivileged_bpf_disabled_accept_default
---
.../tests/system_default.pass.sh | 5 +++++
.../tests/test_config.yml | 6 ++++++
.../tests/value_0.fail.sh | 11 +++++++++++
.../tests/value_1.pass.sh | 11 +++++++++++
.../tests/value_2.pass.sh | 11 +++++++++++
5 files changed, 44 insertions(+)
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/system_default.pass.sh
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_0.fail.sh
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_1.pass.sh
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_2.pass.sh
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/system_default.pass.sh b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/system_default.pass.sh
new file mode 100644
index 00000000000..b9776227bdb
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/system_default.pass.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+# platform = Red Hat Enterprise Linux 9
+
+# Clean sysctl config directories
+rm -rf /usr/lib/sysctl.d/* /run/sysctl.d/* /etc/sysctl.d/*
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
new file mode 100644
index 00000000000..dbac89b4caa
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
@@ -0,0 +1,6 @@
+deny_templated_scenarios:
+ - line_not_there.fail.sh
+ - comment.fail.sh
+ - wrong_value.fail.sh
+ - wrong_value_d_directory.fail.sh
+ - wrong_runtime.fail.sh
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_0.fail.sh b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_0.fail.sh
new file mode 100644
index 00000000000..9f19e0140b4
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_0.fail.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+# platform = Red Hat Enterprise Linux 9
+
+# Clean sysctl config directories
+rm -rf /usr/lib/sysctl.d/* /run/sysctl.d/* /etc/sysctl.d/*
+
+sed -i "/kernel.unprivileged_bpf_disabled/d" /etc/sysctl.conf
+echo "kernel.unprivileged_bpf_disabled = 0" >> /etc/sysctl.conf
+
+# set correct runtime value to check if the filesystem configuration is evaluated properly
+sysctl -w kernel.unprivileged_bpf_disabled="0"
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_1.pass.sh b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_1.pass.sh
new file mode 100644
index 00000000000..e976db594c8
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_1.pass.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+# platform = Red Hat Enterprise Linux 9
+
+# Clean sysctl config directories
+rm -rf /usr/lib/sysctl.d/* /run/sysctl.d/* /etc/sysctl.d/*
+
+sed -i "/kernel.unprivileged_bpf_disabled/d" /etc/sysctl.conf
+echo "kernel.unprivileged_bpf_disabled = 1" >> /etc/sysctl.conf
+
+# set correct runtime value to check if the filesystem configuration is evaluated properly
+sysctl -w kernel.unprivileged_bpf_disabled="1"
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_2.pass.sh b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_2.pass.sh
new file mode 100644
index 00000000000..b1537175eb4
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/value_2.pass.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+# platform = Red Hat Enterprise Linux 9
+
+# Clean sysctl config directories
+rm -rf /usr/lib/sysctl.d/* /run/sysctl.d/* /etc/sysctl.d/*
+
+sed -i "/kernel.unprivileged_bpf_disabled/d" /etc/sysctl.conf
+echo "kernel.unprivileged_bpf_disabled = 2" >> /etc/sysctl.conf
+
+# set correct runtime value to check if the filesystem configuration is evaluated properly
+sysctl -w kernel.unprivileged_bpf_disabled="2"
From 52415b3effb7bf80038b8d866982fd44c8c45312 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Thu, 14 Jul 2022 09:14:53 +0200
Subject: [PATCH 10/23] Use rule
sysctl_kernel_unprivileged_bpf_disabled_accept_default
Use rule sysctl_kernel_unprivileged_bpf_disabled_accept_default
instead of the rule sysctl_kernel_unprivileged_bpf_disabled
in the RHEL 9 OSPP profile.
---
products/rhel9/profiles/ospp.profile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/products/rhel9/profiles/ospp.profile b/products/rhel9/profiles/ospp.profile
index a7ba9532d2c..19e4878c4b0 100644
--- a/products/rhel9/profiles/ospp.profile
+++ b/products/rhel9/profiles/ospp.profile
@@ -74,7 +74,7 @@ selections:
- sysctl_kernel_yama_ptrace_scope
- sysctl_kernel_perf_event_paranoid
- sysctl_user_max_user_namespaces
- - sysctl_kernel_unprivileged_bpf_disabled
+ - sysctl_kernel_unprivileged_bpf_disabled_accept_default
- service_kdump_disabled
### Audit
From 4ff536a006a9d25c9c90a1b1e5fce0f957c51c28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Thu, 14 Jul 2022 09:25:26 +0200
Subject: [PATCH 11/23] Document that sysctlval can be a list
---
docs/templates/template_reference.md | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 5785f1d453f..716407fd5c9 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -815,7 +815,8 @@ The selected value can be changed in the profile (consult the actual variable fo
- **datatype** - data type of the sysctl value, eg. `int`.
- - **sysctlval** - value of the sysctl value, eg. `'1'`. If this
+ - **sysctlval** - value of the sysctl value. This can be either an atomic
+ value, eg. `'1'`, or a list of values, eg. `['1','2']`. If this
parameter is not specified, XCCDF Value is used instead.
- **sysctlval_remediate** - the value that will be used in remediations.
From df27fec11a6e8037288ee8cf5b7bfc7d05537f33 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Thu, 14 Jul 2022 11:00:59 +0200
Subject: [PATCH 12/23] Document the missing_static_pass option
---
docs/templates/template_reference.md | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 716407fd5c9..65da697b808 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -827,6 +827,11 @@ The selected value can be changed in the profile (consult the actual variable fo
should be remedied to. When the **sysctlval** parameter is not a list
this parameter is optional.
+ - **missing_static_pass** - if set to `true` the check will pass if the
+ setting for the given **sysctlvar** is not present in sysctl
+ configuration files. In other words, the check will pass if the system
+ default isn't overriden by configuration. Default value: `false`.
+
- **operation** - operation used for comparison of collected object
with **sysctlval**. Default value: `equals`.
From e8b8497d32d84282d7f34d83f3661c02235d33cb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Thu, 14 Jul 2022 11:03:53 +0200
Subject: [PATCH 13/23] Introduce sysctlval_wrong parameter
When the `sysctalval` parameter is a list, this parameter will be
substitued into the SYSCTL_WRONG_VALUE parameter in test scenarios. This
is better than current computing of the SYSCTL_WRONG_VALUE parameter
which is done by prepending "1" to the string value, because the
computed value could be invalid and the `sysctl -w` command used in the
test scenario wrong_runtime.fail.sh could fail to set the value to
SYSCTL_WRONG_VALUE therefore not changing the runtime. If at the same
time the `missing_static_pass` is set to `true` and the system is set to
system default, then the unchanged runtime would cause the check to pass
and therefore the test scenario wrong_runtime.fail.sh to error.
---
docs/templates/template_reference.md | 3 +++
.../rule.yml | 1 +
shared/templates/sysctl/template.py | 7 ++-----
3 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 65da697b808..7e1fc7049cf 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -827,6 +827,9 @@ The selected value can be changed in the profile (consult the actual variable fo
should be remedied to. When the **sysctlval** parameter is not a list
this parameter is optional.
+ - **sysctlval_wrong** - the value that is always wrong. This will be used
+ only in the test scenarios only if **sysctlval** is a list.
+
- **missing_static_pass** - if set to `true` the check will pass if the
setting for the given **sysctlvar** is not present in sysctl
configuration files. In other words, the check will pass if the system
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index f45769dd2d0..ddff15dff8f 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -78,5 +78,6 @@ template:
- '1'
- '2'
sysctlval_remediate: "2"
+ sysctlval_wrong: "0"
missing_static_pass: "true"
datatype: int
diff --git a/shared/templates/sysctl/template.py b/shared/templates/sysctl/template.py
index 2574d5d42b0..96663694997 100644
--- a/shared/templates/sysctl/template.py
+++ b/shared/templates/sysctl/template.py
@@ -41,11 +41,8 @@ def preprocess(data, lang):
data["sysctl_correct_value"] = "correct_value"
data["sysctl_wrong_value"] = "wrong_value"
elif isinstance(data["sysctlval"], list):
- data["sysctl_correct_value"] = data["sysctlval"][0]
- if data["datatype"] == "int":
- data["sysctl_wrong_value"] = "1" + data["sysctlval"][0]
- elif data["datatype"] == "string":
- data["sysctl_wrong_value"] = "wrong_value"
+ data["sysctl_correct_value"] = data["sysctlval_remediate"]
+ data["sysctl_wrong_value"] = data["sysctlval_wrong"]
else:
data["sysctl_correct_value"] = data["sysctlval"]
if data["datatype"] == "int":
From 5f391a7053f7ce18dd34c45a1d319d65b78348d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Thu, 14 Jul 2022 11:23:59 +0200
Subject: [PATCH 14/23] Change test_config.yml
---
.../tests/test_config.yml | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
index dbac89b4caa..c379680e25c 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
@@ -1,6 +1,6 @@
deny_templated_scenarios:
+ # this rule uses missing_static_pass: true which means the check should pass
+ # if the configuration is missing (or commented out) therefore we disable
+ # line_not_there.fail.sh and comment.fail.sh test scenarios
- line_not_there.fail.sh
- comment.fail.sh
- - wrong_value.fail.sh
- - wrong_value_d_directory.fail.sh
- - wrong_runtime.fail.sh
From 92207a9bd11df0e69bf732e27fb91e5db270f7f6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Fri, 15 Jul 2022 10:36:05 +0200
Subject: [PATCH 15/23] Simplify sysctl template
Instead of using multiple OVAL tests in OR relation we can have
a single OVAL test containing multiple OVAL states in OR relation.
That will simplify the code.
---
shared/templates/sysctl/oval.template | 82 +++++----------------------
1 file changed, 13 insertions(+), 69 deletions(-)
diff --git a/shared/templates/sysctl/oval.template b/shared/templates/sysctl/oval.template
index 1719a59f9c7..8241c391ad2 100644
--- a/shared/templates/sysctl/oval.template
+++ b/shared/templates/sysctl/oval.template
@@ -8,7 +8,13 @@
{{% macro state_static_sysctld(prefix) -%}}
<ind:object object_ref="object_static_{{{ prefix }}}_{{{ rule_id }}}"/>
+{{% if SYSCTLVAL is string %}}
<ind:state state_ref="state_static_sysctld_{{{ rule_id }}}"/>
+{{% elif SYSCTLVAL is sequence %}}
+{{% for x in SYSCTLVAL %}}
+ <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}" />
+{{% endfor %}}
+{{% endif %}}
{{%- endmacro -%}}
{{%- macro sysctl_match() -%}}
{{%- if SYSCTLVAL == "" -%}}
@@ -62,38 +68,24 @@
<def-group>
<definition class="compliance" id="{{{ rule_id }}}_runtime" version="3">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system runtime.") }}}
-{{% if SYSCTLVAL is string %}}
<criteria operator="AND">
<criterion comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}}"
test_ref="test_{{{ rule_id }}}_runtime"/>
</criteria>
-{{% elif SYSCTLVAL is sequence %}}
- <criteria operator="OR">
-{{% for x in SYSCTLVAL %}}
- <criterion comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ x }}}"
- test_ref="test_{{{ rule_id }}}_runtime_{{{ x }}}"/>
-{{% endfor %}}
- </criteria>
-{{% endif %}}
</definition>
-{{% if SYSCTLVAL is string %}}
<unix:sysctl_test id="test_{{{ rule_id }}}_runtime" version="1"
comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}}"
- check="all" check_existence="all_exist">
+ check="all" check_existence="all_exist" state_operator="OR">
<unix:object object_ref="object_{{{ rule_id }}}_runtime"/>
+{{% if SYSCTLVAL is string %}}
<unix:state state_ref="state_{{{ rule_id }}}_runtime"/>
- </unix:sysctl_test>
{{% elif SYSCTLVAL is sequence %}}
{{% for x in SYSCTLVAL %}}
- <unix:sysctl_test id="test_{{{ rule_id }}}_runtime_{{{ x }}}" version="1"
- comment="kernel runtime parameter {{{ SYSCTLVAR }}} set to {{{ x }}}"
- check="all" check_existence="all_exist">
- <unix:object object_ref="object_{{{ rule_id }}}_runtime"/>
<unix:state state_ref="state_{{{ rule_id }}}_runtime_{{{ x }}}" />
- </unix:sysctl_test>
{{% endfor %}}
{{% endif %}}
+ </unix:sysctl_test>
<unix:sysctl_object id="object_{{{ rule_id }}}_runtime" version="1">
<unix:name>{{{ SYSCTLVAR }}}</unix:name>
@@ -139,7 +131,6 @@
{{% endif %}}
<criteria operator="AND">
<criteria operator="OR">
-{{% if SYSCTLVAL is string %}}
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /etc/sysctl.conf"
test_ref="test_{{{ rule_id }}}_static"/>
<!-- see sysctl.d(5) -->
@@ -150,21 +141,6 @@
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
<criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ COMMENT_VALUE }}} in /usr/lib/sysctl.d/*.conf"
test_ref="test_{{{ rule_id }}}_static_usr_lib_sysctld"/>
-{{% endif %}}
-{{% elif SYSCTLVAL is sequence %}}
-{{% for x in SYSCTLVAL %}}
- <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /etc/sysctl.conf"
- test_ref="test_{{{ rule_id }}}_static_{{{ x }}}"/>
- <!-- see sysctl.d(5) -->
- <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /etc/sysctl.d/*.conf"
- test_ref="test_{{{ rule_id }}}_static_{{{ x }}}_etc_sysctld"/>
- <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /run/sysctl.d/*.conf"
- test_ref="test_{{{ rule_id }}}_static_{{{ x }}}_run_sysctld"/>
-{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
- <criterion comment="kernel static parameter {{{ SYSCTLVAR }}} set to {{{ x }}} in /usr/lib/sysctl.d/*.conf"
- test_ref="test_{{{ rule_id }}}_static_{{{ x }}}_usr_lib_sysctld"/>
-{{% endif %}}
-{{% endfor %}}
{{% endif %}}
</criteria>
{{% if target_oval_version >= [5, 11] %}}
@@ -185,61 +161,29 @@
</ind:textfilecontent54_test>
{{% endif %}}
-{{% if SYSCTLVAL is string %}}
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_static" version="1"
check="all" check_existence="all_exist"
- comment="{{{ SYSCTLVAR }}} static configuration">
+ comment="{{{ SYSCTLVAR }}} static configuration" state_operator="OR">
{{{ state_static_sysctld("sysctl") }}}
</ind:textfilecontent54_test>
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_etc_sysctld" version="1" check="all"
- comment="{{{ SYSCTLVAR }}} static configuration in /etc/sysctl.d/*.conf">
+ comment="{{{ SYSCTLVAR }}} static configuration in /etc/sysctl.d/*.conf" state_operator="OR">
{{{ state_static_sysctld("etc_sysctld") }}}
</ind:textfilecontent54_test>
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_run_sysctld" version="1" check="all"
- comment="{{{ SYSCTLVAR }}} static configuration in /run/sysctl.d/*.conf">
+ comment="{{{ SYSCTLVAR }}} static configuration in /run/sysctl.d/*.conf" state_operator="OR">
{{{ state_static_sysctld("run_sysctld") }}}
</ind:textfilecontent54_test>
{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_usr_lib_sysctld" version="1"
check="all"
- comment="{{{ SYSCTLVAR }}} static configuration in /usr/lib/sysctl.d/*.conf">
+ comment="{{{ SYSCTLVAR }}} static configuration in /usr/lib/sysctl.d/*.conf" state_operator="OR">
{{{ state_static_sysctld("usr_lib_sysctld") }}}
</ind:textfilecontent54_test>
{{% endif %}}
-{{% elif SYSCTLVAL is sequence %}}
-{{% for x in SYSCTLVAL %}}
- <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}" version="1"
- check="all" check_existence="all_exist"
- comment="{{{ SYSCTLVAR }}} static configuration">
- <ind:object object_ref="object_static_sysctl_{{{ rule_id }}}"/>
- <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
- </ind:textfilecontent54_test>
-
- <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}_etc_sysctld" version="1" check="all"
- comment="{{{ SYSCTLVAR }}} static configuration in /etc/sysctl.d/*.conf">
- <ind:object object_ref="object_static_etc_sysctld_{{{ rule_id }}}"/>
- <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
- </ind:textfilecontent54_test>
-
- <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}_run_sysctld" version="1" check="all"
- comment="{{{ SYSCTLVAR }}} static configuration in /run/sysctl.d/*.conf">
- <ind:object object_ref="object_static_run_sysctld_{{{ rule_id }}}"/>
- <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
- </ind:textfilecontent54_test>
-
-{{% if product not in [ "ol7", "ol8", "ol9", "rhcos4", "rhel7", "rhel8", "rhel9"] %}}
- <ind:textfilecontent54_test id="test_{{{ rule_id }}}_static_{{{ x }}}_usr_lib_sysctld" version="1"
- check="all"
- comment="{{{ SYSCTLVAR }}} static configuration in /usr/lib/sysctl.d/*.conf">
- <ind:object object_ref="object_static_usr_lib_sysctld_{{{ rule_id }}}"/>
- <ind:state state_ref="state_static_sysctld_{{{ rule_id }}}_{{{ x }}}"/>
- </ind:textfilecontent54_test>
-{{% endif %}}
-{{% endfor %}}
-{{% endif %}}
{{% if target_oval_version >= [5, 11] %}}
<ind:variable_test check="all" check_existence="all_exist" comment="Check that only one file contains {{{ SYSCTLID }}}"
From d78d946740b0b8bef31c054ad0b5c4ab14159442 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Mon, 25 Jul 2022 15:40:24 +0200
Subject: [PATCH 16/23] Replace the sysctlval_remediate template parameter
Replace the sysctlval_remediate template parameter by using an XCCDF
value. The variable would be only used in the remediation and would
allow users to tailor the value, instead of the current solution where
the value is hardcoded and can be only changed during build time.
---
docs/templates/template_reference.md | 21 +++++++++----------
.../rule.yml | 1 -
products/rhel9/profiles/ospp.profile | 1 +
shared/templates/sysctl/ansible.template | 6 +++---
shared/templates/sysctl/bash.template | 10 ++++-----
shared/templates/sysctl/template.py | 11 +---------
6 files changed, 20 insertions(+), 30 deletions(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 7e1fc7049cf..00f991daae7 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -815,17 +815,16 @@ The selected value can be changed in the profile (consult the actual variable fo
- **datatype** - data type of the sysctl value, eg. `int`.
- - **sysctlval** - value of the sysctl value. This can be either an atomic
- value, eg. `'1'`, or a list of values, eg. `['1','2']`. If this
- parameter is not specified, XCCDF Value is used instead.
-
- - **sysctlval_remediate** - the value that will be used in remediations.
- If **sysctlval_remediate** is not specified, the template will use the
- value of the **sysctlval** parameter in the remediations.
- This parameter is mandatory when the **sysctlval** parameter is a list
- because we need to know which of the values in the list the system
- should be remedied to. When the **sysctlval** parameter is not a list
- this parameter is optional.
+ - **sysctlval** - value of the sysctl value. This can be either not
+ specified, or an atomic value, eg. `'1'`, or a list of values,
+ eg. `['1','2']`.
+ - If this parameter is not specified, an XCCDF Value is used instead
+ in OVAL check and remediations.
+ - If this parameter is set to an atomic value, this atomic value
+ will be used in OVAL check and remediations.
+ - If this parameter is set to a list of values, the list will be used
+ in the OVAL check, but won't be used in the remediations.
+ All remediations will use an XCCDF value instead.
- **sysctlval_wrong** - the value that is always wrong. This will be used
only in the test scenarios only if **sysctlval** is a list.
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index ddff15dff8f..9936ed777c8 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -77,7 +77,6 @@ template:
sysctlval:
- '1'
- '2'
- sysctlval_remediate: "2"
sysctlval_wrong: "0"
missing_static_pass: "true"
datatype: int
diff --git a/products/rhel9/profiles/ospp.profile b/products/rhel9/profiles/ospp.profile
index 19e4878c4b0..b47630c62b0 100644
--- a/products/rhel9/profiles/ospp.profile
+++ b/products/rhel9/profiles/ospp.profile
@@ -75,6 +75,7 @@ selections:
- sysctl_kernel_perf_event_paranoid
- sysctl_user_max_user_namespaces
- sysctl_kernel_unprivileged_bpf_disabled_accept_default
+ - sysctl_kernel_unprivileged_bpf_disabled_value=2
- service_kdump_disabled
### Audit
diff --git a/shared/templates/sysctl/ansible.template b/shared/templates/sysctl/ansible.template
index 7724db5e5ff..edc4d3fb667 100644
--- a/shared/templates/sysctl/ansible.template
+++ b/shared/templates/sysctl/ansible.template
@@ -21,7 +21,7 @@
replace: '#{{{ SYSCTLVAR }}}'
loop: "{{ find_sysctl_d.files }}"
-{{%- if SYSCTLVAL_REMEDIATE == "" %}}
+{{%- if SYSCTLVAL == "" or SYSCTLVAL is not string %}}
- (xccdf-var sysctl_{{{ SYSCTLID }}}_value)
- name: Ensure sysctl {{{ SYSCTLVAR }}} is set
@@ -29,10 +29,10 @@
name: "{{{ SYSCTLVAR }}}"
value: "{{ sysctl_{{{ SYSCTLID }}}_value }}"
{{%- else %}}
-- name: Ensure sysctl {{{ SYSCTLVAR }}} is set to {{{ SYSCTLVAL_REMEDIATE }}}
+- name: Ensure sysctl {{{ SYSCTLVAR }}} is set to {{{ SYSCTLVAL }}}
sysctl:
name: "{{{ SYSCTLVAR }}}"
- value: "{{{ SYSCTLVAL_REMEDIATE }}}"
+ value: "{{{ SYSCTLVAL }}}"
{{%- endif %}}
state: present
reload: yes
diff --git a/shared/templates/sysctl/bash.template b/shared/templates/sysctl/bash.template
index 63948bd5a26..cd3424b0228 100644
--- a/shared/templates/sysctl/bash.template
+++ b/shared/templates/sysctl/bash.template
@@ -20,7 +20,7 @@ for f in /etc/sysctl.d/*.conf /run/sysctl.d/*.conf; do
fi
done
-{{%- if SYSCTLVAL_REMEDIATE == "" %}}
+{{%- if SYSCTLVAL == "" or SYSCTLVAL is not string %}}
{{{ bash_instantiate_variables("sysctl_" + SYSCTLID + "_value") }}}
#
@@ -38,11 +38,11 @@ done
#
# Set runtime for {{{ SYSCTLVAR }}}
#
-/sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="{{{ SYSCTLVAL_REMEDIATE }}}"
+/sbin/sysctl -q -n -w {{{ SYSCTLVAR }}}="{{{ SYSCTLVAL }}}"
#
-# If {{{ SYSCTLVAR }}} present in /etc/sysctl.conf, change value to "{{{ SYSCTLVAL_REMEDIATE }}}"
-# else, add "{{{ SYSCTLVAR }}} = {{{ SYSCTLVAL_REMEDIATE }}}" to /etc/sysctl.conf
+# If {{{ SYSCTLVAR }}} present in /etc/sysctl.conf, change value to "{{{ SYSCTLVAL }}}"
+# else, add "{{{ SYSCTLVAR }}} = {{{ SYSCTLVAL }}}" to /etc/sysctl.conf
#
-{{{ bash_replace_or_append('/etc/sysctl.conf', '^' + SYSCTLVAR , SYSCTLVAL_REMEDIATE ) }}}
+{{{ bash_replace_or_append('/etc/sysctl.conf', '^' + SYSCTLVAR , SYSCTLVAL ) }}}
{{%- endif %}}
diff --git a/shared/templates/sysctl/template.py b/shared/templates/sysctl/template.py
index 96663694997..2b779f99a62 100644
--- a/shared/templates/sysctl/template.py
+++ b/shared/templates/sysctl/template.py
@@ -16,15 +16,6 @@ def preprocess(data, lang):
"The sysctlval parameter of {0} is an empty list".format(
data["_rule_id"]))
- if not data.get("sysctlval_remediate"):
- if isinstance(data["sysctlval"], list):
- raise ValueError(
- "Problem with rule {0}: the 'sysctlval' parameter is a list "
- "but we are missing the 'sysctlval_remediate' parameter, so "
- "we don't know how to generate remediation content.".format(
- data["_rule_id"]))
- data["sysctlval_remediate"] = data["sysctlval"]
-
# Configure data for test scenarios
if data["datatype"] not in ["string", "int"]:
raise ValueError(
@@ -41,7 +32,7 @@ def preprocess(data, lang):
data["sysctl_correct_value"] = "correct_value"
data["sysctl_wrong_value"] = "wrong_value"
elif isinstance(data["sysctlval"], list):
- data["sysctl_correct_value"] = data["sysctlval_remediate"]
+ data["sysctl_correct_value"] = data["sysctlval"][0]
data["sysctl_wrong_value"] = data["sysctlval_wrong"]
else:
data["sysctl_correct_value"] = data["sysctlval"]
From 817b47544b4a62aad8153360839bb14dd607d46d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Mon, 25 Jul 2022 15:47:11 +0200
Subject: [PATCH 17/23] Rename a template parameter
Rename the sysctlval_wrong parameter to wrong_sysctlval_for_testing
---
docs/templates/template_reference.md | 4 ++--
.../rule.yml | 2 +-
shared/templates/sysctl/template.py | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 00f991daae7..4e6357c1579 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -826,8 +826,8 @@ The selected value can be changed in the profile (consult the actual variable fo
in the OVAL check, but won't be used in the remediations.
All remediations will use an XCCDF value instead.
- - **sysctlval_wrong** - the value that is always wrong. This will be used
- only in the test scenarios only if **sysctlval** is a list.
+ - **wrong_sysctlval_for_testing** - the value that is always wrong. This will be used
+ only in the templated test scenarios only if **sysctlval** is a list.
- **missing_static_pass** - if set to `true` the check will pass if the
setting for the given **sysctlvar** is not present in sysctl
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index 9936ed777c8..b8af4f7560d 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -77,6 +77,6 @@ template:
sysctlval:
- '1'
- '2'
- sysctlval_wrong: "0"
+ wrong_sysctlval_for_testing: "0"
missing_static_pass: "true"
datatype: int
diff --git a/shared/templates/sysctl/template.py b/shared/templates/sysctl/template.py
index 2b779f99a62..9083a6a4185 100644
--- a/shared/templates/sysctl/template.py
+++ b/shared/templates/sysctl/template.py
@@ -33,7 +33,7 @@ def preprocess(data, lang):
data["sysctl_wrong_value"] = "wrong_value"
elif isinstance(data["sysctlval"], list):
data["sysctl_correct_value"] = data["sysctlval"][0]
- data["sysctl_wrong_value"] = data["sysctlval_wrong"]
+ data["sysctl_wrong_value"] = data["wrong_sysctlval_for_testing"]
else:
data["sysctl_correct_value"] = data["sysctlval"]
if data["datatype"] == "int":
From ed48698e95f96891889fa2c2039172015ae9f069 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Mon, 25 Jul 2022 15:56:26 +0200
Subject: [PATCH 18/23] Rename parameter missing_static_pass
Rename the parameter missing_static_pass to missing_parameter_pass
to make the naming consistent with other templates where a parameter
with a similar meaning exist.
---
docs/templates/template_reference.md | 2 +-
.../rule.yml | 2 +-
.../tests/test_config.yml | 2 +-
shared/templates/sysctl/oval.template | 6 +++---
4 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 4e6357c1579..0fff58c0a23 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -829,7 +829,7 @@ The selected value can be changed in the profile (consult the actual variable fo
- **wrong_sysctlval_for_testing** - the value that is always wrong. This will be used
only in the templated test scenarios only if **sysctlval** is a list.
- - **missing_static_pass** - if set to `true` the check will pass if the
+ - **missing_parameter_pass** - if set to `true` the check will pass if the
setting for the given **sysctlvar** is not present in sysctl
configuration files. In other words, the check will pass if the system
default isn't overriden by configuration. Default value: `false`.
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index b8af4f7560d..7d8769a913f 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -78,5 +78,5 @@ template:
- '1'
- '2'
wrong_sysctlval_for_testing: "0"
- missing_static_pass: "true"
+ missing_parameter_pass: "true"
datatype: int
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
index c379680e25c..5cf68074050 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/tests/test_config.yml
@@ -1,5 +1,5 @@
deny_templated_scenarios:
- # this rule uses missing_static_pass: true which means the check should pass
+ # this rule uses missing_parameter_pass: true which means the check should pass
# if the configuration is missing (or commented out) therefore we disable
# line_not_there.fail.sh and comment.fail.sh test scenarios
- line_not_there.fail.sh
diff --git a/shared/templates/sysctl/oval.template b/shared/templates/sysctl/oval.template
index 8241c391ad2..1a7c4979bbe 100644
--- a/shared/templates/sysctl/oval.template
+++ b/shared/templates/sysctl/oval.template
@@ -126,7 +126,7 @@
<def-group>
<definition class="compliance" id="{{{ rule_id }}}_static" version="3">
{{{ oval_metadata("The kernel '" + SYSCTLVAR + "' parameter should be set to " + COMMENT_VALUE + " in the system configuration.") }}}
-{{% if MISSING_STATIC_PASS == "true" %}}
+{{% if MISSING_PARAMETER_PASS == "true" %}}
<criteria operator="OR">
{{% endif %}}
<criteria operator="AND">
@@ -147,13 +147,13 @@
<criterion comment="Check that {{{ SYSCTLID }}} is defined in only one file" test_ref="test_{{{ rule_id }}}_defined_in_one_file" />
{{% endif %}}
</criteria>
-{{% if MISSING_STATIC_PASS == "true" %}}
+{{% if MISSING_PARAMETER_PASS == "true" %}}
<criterion comment="Check that {{{ SYSCTLID }}} is not defined in any file" test_ref="test_{{{ rule_id }}}_not_defined" />
</criteria>
{{% endif %}}
</definition>
-{{% if MISSING_STATIC_PASS == "true" %}}
+{{% if MISSING_PARAMETER_PASS == "true" %}}
<ind:textfilecontent54_test id="test_{{{ rule_id }}}_not_defined" version="1"
check="all" check_existence="none_exist"
comment="{{{ SYSCTLVAR }}} static configuration">
From f022f549c6d0b5bc0d24c5d1b7c606d23efbd6d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Mon, 25 Jul 2022 16:26:03 +0200
Subject: [PATCH 19/23] Add a variable
sysctl_kernel_unprivileged_bpf_disabled_value
---
..._kernel_unprivileged_bpf_disabled_value.var | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
create mode 100644 linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_value.var
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_value.var b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_value.var
new file mode 100644
index 00000000000..b8bf965a255
--- /dev/null
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_value.var
@@ -0,0 +1,18 @@
+documentation_complete: true
+
+title: kernel.unprivileged_bpf_disabled
+
+description: |-
+ Prevent unprivileged processes from using the bpf() syscall.
+
+type: number
+
+operator: equals
+
+interactive: false
+
+options:
+ default: 2
+ 0: "0"
+ 1: "1"
+ 2: "2"
From 4c8ef02cc91c821d56c061f6d8e2ba1675d0c414 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Tue, 26 Jul 2022 09:36:09 +0200
Subject: [PATCH 20/23] Improve documentation of the sysctl template
---
docs/templates/template_reference.md | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/docs/templates/template_reference.md b/docs/templates/template_reference.md
index 0fff58c0a23..e73b95450fe 100644
--- a/docs/templates/template_reference.md
+++ b/docs/templates/template_reference.md
@@ -819,15 +819,19 @@ The selected value can be changed in the profile (consult the actual variable fo
specified, or an atomic value, eg. `'1'`, or a list of values,
eg. `['1','2']`.
- If this parameter is not specified, an XCCDF Value is used instead
- in OVAL check and remediations.
+ in OVAL check and remediations. The XCCDF Value should have a file
+ name in the form `"sysctl_" + $escaped_sysctlvar + "_value.var"`,
+ where the `escaped_sysctlvar` is a value of the **sysctlvar**
+ parameter in which all characters that don't match the `\w` regular
+ expression are replaced by an underscore (`_`).
- If this parameter is set to an atomic value, this atomic value
will be used in OVAL check and remediations.
- If this parameter is set to a list of values, the list will be used
in the OVAL check, but won't be used in the remediations.
All remediations will use an XCCDF value instead.
- - **wrong_sysctlval_for_testing** - the value that is always wrong. This will be used
- only in the templated test scenarios only if **sysctlval** is a list.
+ - **wrong_sysctlval_for_testing** - the value that is always wrong. This
+ will be used in templated test scenarios when **sysctlval** is a list.
- **missing_parameter_pass** - if set to `true` the check will pass if the
setting for the given **sysctlvar** is not present in sysctl
From 0f89cab50807ecf75269acc49e0c290c139beea6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Tue, 26 Jul 2022 09:36:34 +0200
Subject: [PATCH 21/23] Remove RHEL 8 STIG ID
---
.../rule.yml | 2 --
1 file changed, 2 deletions(-)
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index 7d8769a913f..ec3b5aef82f 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -33,8 +33,6 @@ references:
nist: AC-6,SC-7(10)
ospp: FMT_SMF_EXT.1
srg: SRG-OS-000132-GPOS-00067,SRG-OS-000480-GPOS-00227
- stigid@ol8: OL08-00-040281
- stigid@rhel8: RHEL-08-040281
ocil: |-
The runtime status of the <code>kernel.unprivileged_bpf_disabled</code>
From 5c2116eb08b84c43d644f6ce51744732a63fb206 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Tue, 26 Jul 2022 09:36:47 +0200
Subject: [PATCH 22/23] Fix a typo
---
.../rule.yml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index ec3b5aef82f..589deccb0c7 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -62,7 +62,7 @@ ocil: |-
ocil_clause: "the kernel.unprivileged_bpf_disabled is not set to 1 or 2 or is configured to be 0"
fixtext: |-
- Configure {{{ full_name }}} to prevent privilege escalation thru the kernel by disabling access to the bpf syscall.
+ Configure {{{ full_name }}} to prevent privilege escalation through the kernel by disabling access to the bpf syscall.
srg_requirement: '{{{ full_name }}} must disable access to network bpf syscall from unprivileged processes.'
From 22e5a11f3232234a939dc6a806752b1fa5c69ce4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cern=C3=BD?= <jcerny@redhat.com>
Date: Wed, 27 Jul 2022 10:36:04 +0200
Subject: [PATCH 23/23] Mention both values 1 and 2 in the rule description
---
.../rule.yml | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
index 589deccb0c7..259d1f901c6 100644
--- a/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
+++ b/linux_os/guide/system/permissions/restrictions/sysctl_kernel_unprivileged_bpf_disabled_accept_default/rule.yml
@@ -13,11 +13,13 @@ description: |-
disabled, calling <code>bpf()</code> without <code>CAP_SYS_ADMIN</code> or <code>CAP_BPF</code> will return <code>-EPERM</code>.
Once set to <code>1</code>, this can't be cleared from the running kernel anymore.
+ {{{ describe_sysctl_option_value(sysctl="kernel.unprivileged_bpf_disabled", value="1") }}}
+
Writing <code>2</code> to this entry will also disable unprivileged calls to <code>bpf()</code>,
however, an admin can still change this setting later on, if needed, by
writing <code>0</code> or <code>1</code> to this entry.
- {{{ describe_sysctl_option_value(sysctl="kernel.unprivileged_bpf_disabled", value="1") }}}
+ {{{ describe_sysctl_option_value(sysctl="kernel.unprivileged_bpf_disabled", value="2") }}}
rationale: |-
Loading and accessing the packet filters programs and maps using the bpf()
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