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Andrew Lukoshko 2024-01-12 13:40:50 +00:00
parent 45da74035f
commit 742d4de4d8
7 changed files with 324 additions and 139 deletions
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1
.frr.metadata
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@ -1,2 +1 @@
dfc756dfd123360d1e1a760d66821e47f9a6afed SOURCES/frr-7.5.1.tar.gz
e25979fad0e873cd0196e528cae570ba18c11a8f SOURCES/frr.if

1
.gitignore vendored
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@ -1,2 +1 @@
SOURCES/frr-7.5.1.tar.gz
SOURCES/frr.if

128
SOURCES/0015-CVE-2023-38802.patch
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@ -1,128 +0,0 @@
From bcb6b58d9530173df41d3a3cbc4c600ee0b4b186 Mon Sep 17 00:00:00 2001
From: Donatas Abraitis <donatas@opensourcerouting.org>
Date: Thu, 13 Jul 2023 22:32:03 +0300
Subject: [PATCH] bgpd: Use treat-as-withdraw for tunnel encapsulation
attribute
Before this path we used session reset method, which is discouraged by rfc7606.
Handle this as rfc requires.
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
---
bgpd/bgp_attr.c | 61 ++++++++++++++++++++-----------------------------
1 file changed, 25 insertions(+), 36 deletions(-)
diff --git a/bgpd/bgp_attr.c b/bgpd/bgp_attr.c
index dcf0f4d47cfb..8c53191d680f 100644
--- a/bgpd/bgp_attr.c
+++ b/bgpd/bgp_attr.c
@@ -1301,6 +1301,7 @@ bgp_attr_malformed(struct bgp_attr_parser_args *args, uint8_t subcode,
case BGP_ATTR_LARGE_COMMUNITIES:
case BGP_ATTR_ORIGINATOR_ID:
case BGP_ATTR_CLUSTER_LIST:
+ case BGP_ATTR_ENCAP:
return BGP_ATTR_PARSE_WITHDRAW;
case BGP_ATTR_MP_REACH_NLRI:
case BGP_ATTR_MP_UNREACH_NLRI:
@@ -2434,26 +2435,21 @@ bgp_attr_ipv6_ext_communities(struct bgp_attr_parser_args *args)
}
/* Parse Tunnel Encap attribute in an UPDATE */
-static int bgp_attr_encap(uint8_t type, struct peer *peer, /* IN */
- bgp_size_t length, /* IN: attr's length field */
- struct attr *attr, /* IN: caller already allocated */
- uint8_t flag, /* IN: attr's flags field */
- uint8_t *startp)
+static int bgp_attr_encap(struct bgp_attr_parser_args *args)
{
- bgp_size_t total;
uint16_t tunneltype = 0;
-
- total = length + (CHECK_FLAG(flag, BGP_ATTR_FLAG_EXTLEN) ? 4 : 3);
+ struct peer *const peer = args->peer;
+ struct attr *const attr = args->attr;
+ bgp_size_t length = args->length;
+ uint8_t type = args->type;
+ uint8_t flag = args->flags;
if (!CHECK_FLAG(flag, BGP_ATTR_FLAG_TRANS)
|| !CHECK_FLAG(flag, BGP_ATTR_FLAG_OPTIONAL)) {
- zlog_info(
- "Tunnel Encap attribute flag isn't optional and transitive %d",
- flag);
- bgp_notify_send_with_data(peer, BGP_NOTIFY_UPDATE_ERR,
- BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
- startp, total);
- return -1;
+ zlog_err("Tunnel Encap attribute flag isn't optional and transitive %d",
+ flag);
+ return bgp_attr_malformed(args, BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
+ args->total);
}
if (BGP_ATTR_ENCAP == type) {
@@ -2461,12 +2457,11 @@ static int bgp_attr_encap(uint8_t type, struct peer *peer, /* IN */
uint16_t tlv_length;
if (length < 4) {
- zlog_info(
+ zlog_err(
"Tunnel Encap attribute not long enough to contain outer T,L");
- bgp_notify_send_with_data(
- peer, BGP_NOTIFY_UPDATE_ERR,
- BGP_NOTIFY_UPDATE_OPT_ATTR_ERR, startp, total);
- return -1;
+ return bgp_attr_malformed(args,
+ BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
+ args->total);
}
tunneltype = stream_getw(BGP_INPUT(peer));
tlv_length = stream_getw(BGP_INPUT(peer));
@@ -2496,13 +2491,11 @@ static int bgp_attr_encap(uint8_t type, struct peer *peer, /* IN */
}
if (sublength > length) {
- zlog_info(
- "Tunnel Encap attribute sub-tlv length %d exceeds remaining length %d",
- sublength, length);
- bgp_notify_send_with_data(
- peer, BGP_NOTIFY_UPDATE_ERR,
- BGP_NOTIFY_UPDATE_OPT_ATTR_ERR, startp, total);
- return -1;
+ zlog_err("Tunnel Encap attribute sub-tlv length %d exceeds remaining length %d",
+ sublength, length);
+ return bgp_attr_malformed(args,
+ BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
+ args->total);
}
/* alloc and copy sub-tlv */
@@ -2550,13 +2543,10 @@ static int bgp_attr_encap(uint8_t type, struct peer *peer, /* IN */
if (length) {
/* spurious leftover data */
- zlog_info(
- "Tunnel Encap attribute length is bad: %d leftover octets",
- length);
- bgp_notify_send_with_data(peer, BGP_NOTIFY_UPDATE_ERR,
- BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
- startp, total);
- return -1;
+ zlog_err("Tunnel Encap attribute length is bad: %d leftover octets",
+ length);
+ return bgp_attr_malformed(args, BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
+ args->total);
}
return 0;
@@ -3396,8 +3386,7 @@ enum bgp_attr_parse_ret bgp_attr_parse(struct peer *peer, struct attr *attr,
case BGP_ATTR_VNC:
#endif
case BGP_ATTR_ENCAP:
- ret = bgp_attr_encap(type, peer, length, attr, flag,
- startp);
+ ret = bgp_attr_encap(&attr_args);
break;
case BGP_ATTR_PREFIX_SID:
ret = bgp_attr_prefix_sid(&attr_args);

93
SOURCES/0015-max-ttl-reload.patch Normal file
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@ -0,0 +1,93 @@
From 767aaa3a80489bfc4ff097f932fc347e3db25b89 Mon Sep 17 00:00:00 2001
From: Donatas Abraitis <donatas@opensourcerouting.org>
Date: Mon, 21 Aug 2023 00:01:42 +0300
Subject: [PATCH] bgpd: Do not explicitly print MAXTTL value for ebgp-multihop
vty output
1. Create /etc/frr/frr.conf
```
frr version 7.5
frr defaults traditional
hostname centos8.localdomain
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
line vty
router bgp 4250001000
neighbor 192.168.122.207 remote-as 65512
neighbor 192.168.122.207 ebgp-multihop
```
2. Start FRR
`# systemctl start frr
`
3. Show running configuration. Note that FRR explicitly set and shows the default TTL (225)
```
Building configuration...
Current configuration:
!
frr version 7.5
frr defaults traditional
hostname centos8.localdomain
no ip forwarding
no ipv6 forwarding
service integrated-vtysh-config
!
router bgp 4250001000
neighbor 192.168.122.207 remote-as 65512
neighbor 192.168.122.207 ebgp-multihop 255
!
line vty
!
end
```
4. Copy initial frr.conf to frr.conf.new (no changes)
`# cp /etc/frr/frr.conf /root/frr.conf.new
`
5. Run frr-reload.sh:
```
$ /usr/lib/frr/frr-reload.py --test /root/frr.conf.new
2023-08-20 20:15:48,050 INFO: Called via "Namespace(bindir='/usr/bin', confdir='/etc/frr', daemon='', debug=False, filename='/root/frr.conf.new', input=None, log_level='info', overwrite=False, pathspace=None, reload=False, rundir='/var/run/frr', stdout=False, test=True, vty_socket=None)"
2023-08-20 20:15:48,050 INFO: Loading Config object from file /root/frr.conf.new
2023-08-20 20:15:48,124 INFO: Loading Config object from vtysh show running
Lines To Delete
===============
router bgp 4250001000
no neighbor 192.168.122.207 ebgp-multihop 255
Lines To Add
============
router bgp 4250001000
neighbor 192.168.122.207 ebgp-multihop
```
Closes https://github.com/FRRouting/frr/issues/14242
Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
---
bgpd/bgp_vty.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/bgpd/bgp_vty.c b/bgpd/bgp_vty.c
index be0fe4283747..c9a9255f3392 100644
--- a/bgpd/bgp_vty.c
+++ b/bgpd/bgp_vty.c
@@ -17735,8 +17735,12 @@ static void bgp_config_write_peer_global(struct vty *vty, struct bgp *bgp,
&& !(peer->gtsm_hops != BGP_GTSM_HOPS_DISABLED
&& peer->ttl == MAXTTL)) {
if (!peer_group_active(peer) || g_peer->ttl != peer->ttl) {
- vty_out(vty, " neighbor %s ebgp-multihop %d\n", addr,
- peer->ttl);
+ if (peer->ttl != MAXTTL)
+ vty_out(vty, " neighbor %s ebgp-multihop %d\n",
+ addr, peer->ttl);
+ else
+ vty_out(vty, " neighbor %s ebgp-multihop\n",
+ addr);
}
}

206
SOURCES/frr.if Normal file
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@ -0,0 +1,206 @@
## <summary>policy for frr</summary>
########################################
## <summary>
## Execute frr_exec_t in the frr domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed to transition.
## </summary>
## </param>
#
interface(`frr_domtrans',`
gen_require(`
type frr_t, frr_exec_t;
')
corecmd_search_bin($1)
domtrans_pattern($1, frr_exec_t, frr_t)
')
######################################
## <summary>
## Execute frr in the caller domain.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`frr_exec',`
gen_require(`
type frr_exec_t;
')
corecmd_search_bin($1)
can_exec($1, frr_exec_t)
')
########################################
## <summary>
## Read frr's log files.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
## <rolecap/>
#
interface(`frr_read_log',`
gen_require(`
type frr_log_t;
')
read_files_pattern($1, frr_log_t, frr_log_t)
optional_policy(`
logging_search_logs($1)
')
')
########################################
## <summary>
## Append to frr log files.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`frr_append_log',`
gen_require(`
type frr_log_t;
')
append_files_pattern($1, frr_log_t, frr_log_t)
optional_policy(`
logging_search_logs($1)
')
')
########################################
## <summary>
## Manage frr log files
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`frr_manage_log',`
gen_require(`
type frr_log_t;
')
manage_dirs_pattern($1, frr_log_t, frr_log_t)
manage_files_pattern($1, frr_log_t, frr_log_t)
manage_lnk_files_pattern($1, frr_log_t, frr_log_t)
optional_policy(`
logging_search_logs($1)
')
')
########################################
## <summary>
## Read frr PID files.
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`frr_read_pid_files',`
gen_require(`
type frr_var_run_t;
')
files_search_pids($1)
read_files_pattern($1, frr_var_run_t, frr_var_run_t)
')
########################################
## <summary>
## All of the rules required to administrate
## an frr environment
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
interface(`frr_admin',`
gen_require(`
type frr_t;
type frr_log_t;
type frr_var_run_t;
')
allow $1 frr_t:process { signal_perms };
ps_process_pattern($1, frr_t)
tunable_policy(`deny_ptrace',`',`
allow $1 frr_t:process ptrace;
')
admin_pattern($1, frr_log_t)
files_search_pids($1)
admin_pattern($1, frr_var_run_t)
optional_policy(`
logging_search_logs($1)
')
optional_policy(`
systemd_passwd_agent_exec($1)
systemd_read_fifo_file_passwd_run($1)
')
')
########################################
## <summary>
## Read ifconfig_var_run_t files and link files
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
ifndef(`sysnet_read_ifconfig_run',`
interface(`sysnet_read_ifconfig_run',`
gen_require(`
type ifconfig_var_run_t;
')
manage_files_pattern($1, ifconfig_var_run_t, ifconfig_var_run_t)
list_dirs_pattern($1, ifconfig_var_run_t, ifconfig_var_run_t)
read_files_pattern($1, ifconfig_var_run_t, ifconfig_var_run_t)
read_lnk_files_pattern($1, ifconfig_var_run_t, ifconfig_var_run_t)
')
')
########################################
## <summary>
## Read unconfined_t files and dirs
## </summary>
## <param name="domain">
## <summary>
## Domain allowed access.
## </summary>
## </param>
#
ifndef(`unconfined_read_files',`
interface(`unconfined_read_files',`
gen_require(`
type unconfined_t;
')
allow $1 unconfined_t:file read_file_perms;
allow $1 unconfined_t:dir list_dir_perms;
')
')

7
SOURCES/frr.te
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@ -31,7 +31,7 @@ files_pid_file(frr_var_run_t)
#
# frr local policy
#
allow frr_t self:capability { fowner fsetid chown dac_override dac_read_search kill net_bind_service net_raw setgid setuid net_admin };
allow frr_t self:capability { fowner fsetid chown dac_override dac_read_search kill net_bind_service net_raw setgid setuid net_admin sys_admin };
allow frr_t self:netlink_route_socket rw_netlink_socket_perms;
allow frr_t self:packet_socket create;
allow frr_t self:process { setcap setpgid };
@ -96,6 +96,7 @@ fs_read_nsfs_files(frr_t)
fs_search_cgroup_dirs(frr_t)
sysnet_exec_ifconfig(frr_t)
sysnet_read_ifconfig_run(frr_t)
userdom_read_admin_home_files(frr_t)
@ -107,6 +108,10 @@ optional_policy(`
logging_send_syslog_msg(frr_t)
')
optional_policy(`
unconfined_read_files(frr_t)
')
optional_policy(`
modutils_exec_kmod(frr_t)
modutils_getattr_module_deps(frr_t)

27
SPECS/frr.spec
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@ -7,7 +7,7 @@
Name: frr
Version: 7.5.1
Release: 7%{?checkout}%{?dist}.2.alma.1
Release: 13%{?checkout}%{?dist}
Summary: Routing daemon
License: GPLv2+
URL: http://www.frrouting.org
@ -53,11 +53,8 @@ Patch0010: 0010-moving-executables.patch
Patch0011: 0011-reload-bfd-profile.patch
Patch0012: 0012-graceful-restart.patch
Patch0013: 0013-CVE-2022-37032.patch
# Patches were taken from upstream and modified to apply cleanly:
# https://git.almalinux.org/rpms/frr/raw/commit/7599d0ae96d0c1d1f42ae62e1f885ee58ed5b0cd/SOURCES/0010-CVE-2023-38802.patch
Patch0014: 0014-bfd-profile-crash.patch
# https://gitlab.com/redhat/centos-stream/rpms/frr/-/blob/7e4d5613074b57d55f0ab900c85e20afccf1fbd4/0014-bfd-profile-crash.patch
Patch0015: 0015-CVE-2023-38802.patch
Patch0015: 0015-max-ttl-reload.patch
%description
FRRouting is free software that manages TCP/IP based routing protocols. It takes
@ -278,9 +275,23 @@ make check PYTHON=%{__python3}
%endif
%changelog
* Wed Sep 20 2023 Eduard Abdullin <eabdullin@almalinux.org> - 7.5.1-7.2.alma.1
- Fix CVE-2023-38802
- bfdd: remove profiles when removing bfd node
* Tue Oct 10 2023 Michal Ruprich <mruprich@redhat.com> - 7.5.1-13
- Resolves: RHEL-2263 - eBGP multihop peer flapping due to delta miscalculation of new configuration
* Wed Aug 23 2023 Michal Ruprich <mruprich@redhat.com> - 7.5.1-12
- Resolves: #2216911 - Adding missing sys_admin SELinux call
* Mon Aug 21 2023 Michal Ruprich <mruprich@redhat.com> - 7.5.1-11
- Related: #2216911 - Adding unconfined_t type to access namespaces
* Thu Aug 17 2023 Michal Ruprich <mruprich@redhat.com> - 7.5.1-10
- Related: #2226803 - Adding patch
* Wed Aug 16 2023 Michal Ruprich <mruprich@redhat.com> - 7.5.1-9
- Resolves: #2226803 - BFD crash in FRR running in MetalLB
* Fri Aug 11 2023 Michal Ruprich <mruprich@redhat.com> - 7.5.1-8
- Resolves: #2216911 - SELinux is preventing FRR-Zebra to access to network namespaces
* Wed Nov 30 2022 Michal Ruprich <mruprich@redhat.com> - 7.5.1-7
- Resolves: #2128737 - out-of-bounds read in the BGP daemon may lead to information disclosure or denial of service