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scap-security-guide/scap-security-guide-0.1.61-file_permissions-PR_7788.patch

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diff --git a/linux_os/guide/system/permissions/files/permissions_local_var_log/bash/ubuntu.sh b/linux_os/guide/system/permissions/files/permissions_local_var_log/bash/ubuntu.sh
new file mode 100644
index 00000000000..93fd73e6ece
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_local_var_log/bash/ubuntu.sh
@@ -0,0 +1,14 @@
+# platform = multi_platform_ubuntu
+
+readarray -t files < <(find /var/log/)
+for file in "${files[@]}"; do
+ if basename $file | grep -qE '^.*$'; then
+ chmod 0640 $file
+ fi
+done
+
+if grep -qE "^f \/var\/log\/(btmp|wtmp|lastlog)? " /usr/lib/tmpfiles.d/var.conf; then
+ sed -i --follow-symlinks "s/\(^f[[:space:]]\+\/var\/log\/btmp[[:space:]]\+\)\(\([[:digit:]]\+\)[^ $]*\)/\10640/" /usr/lib/tmpfiles.d/var.conf
+ sed -i --follow-symlinks "s/\(^f[[:space:]]\+\/var\/log\/wtmp[[:space:]]\+\)\(\([[:digit:]]\+\)[^ $]*\)/\10640/" /usr/lib/tmpfiles.d/var.conf
+ sed -i --follow-symlinks "s/\(^f[[:space:]]\+\/var\/log\/lastlog[[:space:]]\+\)\(\([[:digit:]]\+\)[^ $]*\)/\10640/" /usr/lib/tmpfiles.d/var.conf
+fi
diff --git a/linux_os/guide/system/permissions/files/permissions_local_var_log/oval/shared.xml b/linux_os/guide/system/permissions/files/permissions_local_var_log/oval/shared.xml
deleted file mode 100644
index dd95ce05936..00000000000
--- a/linux_os/guide/system/permissions/files/permissions_local_var_log/oval/shared.xml
+++ /dev/null
@@ -1,36 +0,0 @@
-<def-group>
- <definition class="compliance" id="permissions_local_var_log" version="1">
- {{{ oval_metadata("
- Checks that files in /var/log have permission at least 0640
- ") }}}
- <criteria operator="AND">
- <criterion test_ref="test_mode_log_files" />
- </criteria>
- </definition>
-
- <unix:file_test check="all" check_existence="none_exist" comment="log file with less restrictive permission than 0640" id="test_mode_log_files" version="1">
- <unix:object object_ref="object_file_mode_log_files" />
- </unix:file_test>
-
- <unix:file_object comment="log files" id="object_file_mode_log_files" version="1">
- <unix:path operation="pattern match">^\/var\/log\/</unix:path>
- <unix:filename operation="pattern match">^.*$</unix:filename>
- <filter action="include">log_files_permission_more_0640</filter>
- <filter action="exclude">var_log_symlinks</filter>
- </unix:file_object>
-
- <unix:file_state id="log_files_permission_more_0640" version="1" operator="OR">
- <!-- if any one of these is true then mode is NOT 0640 (hence the OR operator) -->
- <unix:uexec datatype="boolean">true</unix:uexec>
- <unix:gwrite datatype="boolean">true</unix:gwrite>
- <unix:gexec datatype="boolean">true</unix:gexec>
- <unix:oread datatype="boolean">true</unix:oread>
- <unix:owrite datatype="boolean">true</unix:owrite>
- <unix:oexec datatype="boolean">true</unix:oexec>
- </unix:file_state>
-
- <unix:file_state id="var_log_symlinks" version="1">
- <unix:type operation="equals">symbolic link</unix:type>
- </unix:file_state>
-
-</def-group>
diff --git a/linux_os/guide/system/permissions/files/permissions_local_var_log/rule.yml b/linux_os/guide/system/permissions/files/permissions_local_var_log/rule.yml
index 2b0431b7763..9ce79cfde4e 100644
--- a/linux_os/guide/system/permissions/files/permissions_local_var_log/rule.yml
+++ b/linux_os/guide/system/permissions/files/permissions_local_var_log/rule.yml
@@ -47,3 +47,10 @@ ocil: |-
<pre>
sudo find /var/log -perm /137 -type f -exec stat -c "%n %a" {} \;
</pre>
+
+template:
+ name: file_permissions
+ vars:
+ filepath: /var/log/
+ file_regex: '.*'
+ filemode: '0640'
diff --git a/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/var_logfile_correct_mode.pass.sh b/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/var_logfile_correct_mode.pass.sh
index 5317ef272b8..1793259cff5 100644
--- a/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/var_logfile_correct_mode.pass.sh
+++ b/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/var_logfile_correct_mode.pass.sh
@@ -1,5 +1,6 @@
#!/bin/bash
+chmod -R 640 /var/log
mkdir -p /var/log/testme
touch /var/log/testme/test.log
chmod 640 /var/log/testme/test.log
diff --git a/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/world_writable_dir.pass.sh b/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/world_writable_dir.pass.sh
index 83db1acf8d3..69b081473a5 100644
--- a/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/world_writable_dir.pass.sh
+++ b/linux_os/guide/system/permissions/files/permissions_local_var_log/tests/world_writable_dir.pass.sh
@@ -1,4 +1,5 @@
#!/bin/bash
+chmod -R 640 /var/log/
mkdir -p /var/log/testme
chmod 777 /var/log/testme
diff --git a/linux_os/guide/system/permissions/files/permissions_var_log_dir/file_permissions_var_log/bash/ubuntu.sh b/linux_os/guide/system/permissions/files/permissions_var_log_dir/file_permissions_var_log/bash/ubuntu.sh
new file mode 100644
index 00000000000..93962ea66a7
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_var_log_dir/file_permissions_var_log/bash/ubuntu.sh
@@ -0,0 +1,7 @@
+# platform = multi_platform_ubuntu
+
+chmod 0755 /var/log/
+
+if grep -q "^z \/var\/log " /usr/lib/tmpfiles.d/00rsyslog.conf; then
+ sed -i --follow-symlinks "s/\(^z[[:space:]]\+\/var\/log[[:space:]]\+\)\(\([[:digit:]]\+\)[^ $]*\)/\10755/" /usr/lib/tmpfiles.d/00rsyslog.conf
+fi
diff --git a/linux_os/guide/system/permissions/files/permissions_var_log_dir/file_permissions_var_log_syslog/rule.yml b/linux_os/guide/system/permissions/files/permissions_var_log_dir/file_permissions_var_log_syslog/rule.yml
new file mode 100644
index 00000000000..73258d40fdc
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_var_log_dir/file_permissions_var_log_syslog/rule.yml
@@ -0,0 +1,28 @@
+documentation_complete: true
+
+title: 'Verify Permissions on /var/log/syslog File'
+
+description: |-
+ {{{ describe_file_permissions(file="/var/log/syslog", perms="0640") }}}
+
+rationale: |-
+ The <tt>/var/log/syslog</tt> file contains logs of error messages in
+ the system and should only be accessed by authorized personnel.
+
+severity: medium
+
+references:
+ disa: CCI-001314
+ srg: SRG-OS-000206-GPOS-00084
+ stigid@ubuntu2004: UBTU-20-010422
+
+ocil_clause: '{{{ ocil_clause_file_permissions(file="/var/log/syslog", perms="-rw-r-----") }}}'
+
+ocil: |-
+ {{{ ocil_file_permissions(file="/var/log/syslog", perms="-rw-r-----") }}}
+
+template:
+ name: file_permissions
+ vars:
+ filepath: /var/log/syslog
+ filemode: '0640'
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_binary_dirs/rule.yml b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_binary_dirs/rule.yml
new file mode 100644
index 00000000000..a666c768870
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_binary_dirs/rule.yml
@@ -0,0 +1,57 @@
+documentation_complete: true
+
+title: 'Verify that System Executable Directories Have Restrictive Permissions'
+
+description: |-
+ System executables are stored in the following directories by default:
+ <pre>/bin
+ /sbin
+ /usr/bin
+ /usr/sbin
+ /usr/local/bin
+ /usr/local/sbin</pre>
+ These directories should not be group-writable or world-writable.
+ If any directory <i>DIR</i> in these directories is found to be
+ group-writable or world-writable, correct its permission with the
+ following command:
+ <pre>$ sudo chmod go-w <i>DIR</i></pre>
+
+rationale: |-
+ System binaries are executed by privileged users, as well as system services,
+ and restrictive permissions are necessary to ensure execution of these programs
+ cannot be co-opted.
+
+severity: medium
+
+references:
+ disa: CCI-001495
+ srg: SRG-OS-000258-GPOS-00099
+ stigid@ubuntu2004: UBTU-20-010423
+
+ocil_clause: 'any of these files are group-writable or world-writable'
+
+ocil: |-
+ System executables are stored in the following directories by default:
+ <pre>/bin
+ /sbin
+ /usr/bin
+ /usr/sbin
+ /usr/local/bin
+ /usr/local/sbin</pre>
+ To find system executables directories that are group-writable or
+ world-writable, run the following command for each directory <i>DIR</i>
+ which contains system executables:
+ <pre>$ sudo find -L <i>DIR</i> -perm /022 -type d</pre>
+
+template:
+ name: file_permissions
+ vars:
+ filepath:
+ - /bin/
+ - /sbin/
+ - /usr/bin/
+ - /usr/sbin/
+ - /usr/local/bin/
+ - /usr/local/sbin/
+ recursive: 'true'
+ filemode: '0755'
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/all_dirs_ok.pass.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/all_dirs_ok.pass.sh
index 3f7239deef9..af078463b05 100644
--- a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/all_dirs_ok.pass.sh
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/all_dirs_ok.pass.sh
@@ -1,4 +1,4 @@
-# platform = multi_platform_sle
+# platform = multi_platform_sle,multi_platform_ubuntu
DIRS="/lib /lib64 /usr/lib /usr/lib64"
for dirPath in $DIRS; do
find "$dirPath" -perm /022 -type d -exec chmod go-w '{}' \;
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/owner_only_writable_dir.pass.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/owner_only_writable_dir.pass.sh
index 1f68586853d..d58616bcafb 100644
--- a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/owner_only_writable_dir.pass.sh
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/owner_only_writable_dir.pass.sh
@@ -1,5 +1,6 @@
-# platform = multi_platform_sle
+# platform = multi_platform_sle,multi_platform_ubuntu
DIRS="/lib /lib64 /usr/lib /usr/lib64"
for dirPath in $DIRS; do
+ chmod -R 755 "$dirPath"
mkdir -p "$dirPath/testme" && chmod 700 "$dirPath/testme"
done
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_lib.fail.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_lib.fail.sh
index b60a7269568..98d18cde3ea 100644
--- a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_lib.fail.sh
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_lib.fail.sh
@@ -1,4 +1,4 @@
-# platform = multi_platform_sle
+# platform = multi_platform_sle,multi_platform_ubuntu
DIRS="/lib /lib64"
for dirPath in $DIRS; do
mkdir -p "$dirPath/testme" && chmod 777 "$dirPath/testme"
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_usr_lib.fail.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_usr_lib.fail.sh
index 5438b51bb6a..6df6e2f8f9b 100644
--- a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_usr_lib.fail.sh
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/dir_permissions_library_dirs/tests/world_writable_dir_on_usr_lib.fail.sh
@@ -1,4 +1,4 @@
-# platform = multi_platform_sle
+# platform = multi_platform_sle,multi_platform_ubuntu
DIRS="/usr/lib /usr/lib64"
for dirPath in $DIRS; do
mkdir -p "$dirPath/testme" && chmod 777 "$dirPath/testme"
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_audit_binaries/rule.yml b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_audit_binaries/rule.yml
new file mode 100644
index 00000000000..da42e997478
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_audit_binaries/rule.yml
@@ -0,0 +1,78 @@
+documentation_complete: true
+
+prodtype: ubuntu2004
+
+title: 'Verify that audit tools Have Mode 0755 or less'
+
+description: |-
+ The {{{ full_name }}} operating system audit tools must have the proper
+ permissions configured to protected against unauthorized access.
+
+ Verify it by running the following command:
+ <pre>$ stat -c "%n %a" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sbin/auditd /sbin/audispd /sbin/augenrules
+
+ /sbin/auditctl 755
+ /sbin/aureport 755
+ /sbin/ausearch 755
+ /sbin/autrace 755
+ /sbin/auditd 755
+ /sbin/audispd 755
+ /sbin/augenrules 755
+ </pre>
+
+ Audit tools needed to successfully view and manipulate audit information
+ system activity and records. Audit tools include custom queries and report
+ generators
+
+rationale: |-
+ Protecting audit information also includes identifying and protecting the
+ tools used to view and manipulate log data. Therefore, protecting audit
+ tools is necessary to prevent unauthorized operation on audit information.
+
+ Operating systems providing tools to interface with audit information
+ will leverage user permissions and roles identifying the user accessing the
+ tools and the corresponding rights the user enjoys to make access decisions
+ regarding the access to audit tools.
+
+severity: medium
+
+references:
+ disa: CCI-001493,CCI-001494
+ srg: SRG-OS-000256-GPOS-00097,SRG-OS-000257-GPOS-00098
+ stigid@ubuntu2004: UBTU-20-010199
+
+ocil: |-
+ Verify it by running the following command:
+ <pre>$ stat -c "%n %a" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sbin/auditd /sbin/audispd /sbin/augenrules
+
+ /sbin/auditctl 755
+ /sbin/aureport 755
+ /sbin/ausearch 755
+ /sbin/autrace 755
+ /sbin/auditd 755
+ /sbin/audispd 755
+ /sbin/augenrules 755
+ </pre>
+
+ If the command does not return all the above lines, the missing ones
+ need to be added.
+
+ Run the following command to correct the permissions of the missing
+ entries:
+ <pre>$ sudo chmod 0755 [audit_tool] </pre>
+
+ Replace "[audit_tool]" with the audit tool that does not have the
+ correct permissions.
+
+template:
+ name: file_permissions
+ vars:
+ filepath:
+ - /sbin/auditctl
+ - /sbin/aureport
+ - /sbin/ausearch
+ - /sbin/autrace
+ - /sbin/auditd
+ - /sbin/audispd
+ - /sbin/augenrules
+ filemode: '0755'
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/bash/shared.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/bash/shared.sh
index de2e1e98dfa..ab89b277a52 100644
--- a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/bash/shared.sh
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/bash/shared.sh
@@ -1,4 +1,4 @@
-# platform = Red Hat Virtualization 4,multi_platform_rhel,multi_platform_ol,multi_platform_sle
+# platform = Red Hat Virtualization 4,multi_platform_rhel,multi_platform_ol,multi_platform_sle,multi_platform_ubuntu
DIRS="/bin /usr/bin /usr/local/bin /sbin /usr/sbin /usr/local/sbin /usr/libexec"
for dirPath in $DIRS; do
find "$dirPath" -perm /022 -exec chmod go-w '{}' \;
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/tests/correct_permissions.pass.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/tests/correct_permissions.pass.sh
new file mode 100644
index 00000000000..59b8838581c
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/tests/correct_permissions.pass.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+DIRS="/bin /usr/bin /usr/local/bin /sbin /usr/sbin /usr/local/sbin /usr/libexec"
+for dirPath in $DIRS; do
+ find "$dirPath" -perm /022 -type f -exec chmod 0755 '{}' \;
+done
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/tests/incorrect_permissions.fail.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/tests/incorrect_permissions.fail.sh
new file mode 100644
index 00000000000..9d9ce30064b
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/tests/incorrect_permissions.fail.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+DIRS="/bin /usr/bin /usr/local/bin /sbin /usr/sbin /usr/local/sbin /usr/libexec"
+for dirPath in $DIRS; do
+ find "$dirPath" -type f -exec chmod 0777 '{}' \;
+done
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_library_dirs/tests/correct_permissions.pass.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_library_dirs/tests/correct_permissions.pass.sh
new file mode 100644
index 00000000000..de388e63325
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_library_dirs/tests/correct_permissions.pass.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+DIRS="/lib /lib64 /usr/lib /usr/lib64"
+for dirPath in $DIRS; do
+ chmod -R 755 "$dirPath"
+done
diff --git a/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_library_dirs/tests/incorrect_permissions.fail.sh b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_library_dirs/tests/incorrect_permissions.fail.sh
new file mode 100644
index 00000000000..913e75e7b17
--- /dev/null
+++ b/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_library_dirs/tests/incorrect_permissions.fail.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+DIRS="/lib /lib64 /usr/lib /usr/lib64"
+for dirPath in $DIRS; do
+ find "$dirPath" -type d -exec chmod go-w '{}' \;
+ find "$dirPath" -type f -exec chmod go+w '{}' \;
+done
diff --git a/shared/templates/file_permissions/oval.template b/shared/templates/file_permissions/oval.template
index 89083e812c1..6b3616a7f42 100644
--- a/shared/templates/file_permissions/oval.template
+++ b/shared/templates/file_permissions/oval.template
@@ -67,6 +67,11 @@
#}}
<filter action="include">state_file_permissions{{{ FILEID }}}_{{{ loop.index0 }}}_mode_not_{{{ FILEMODE }}}</filter>
{{%- endif %}}
+ <filter action="exclude">exclude_symlinks_{{{ FILEID }}}</filter>
</unix:file_object>
{{% endfor %}}
+
+ <unix:file_state id="exclude_symlinks_{{{ FILEID }}}" version="1">
+ <unix:type operation="equals">symbolic link</unix:type>
+ </unix:file_state>
</def-group>
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