Moderate: frr security and bug fix update

Topic

An update for frr is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

FRRouting is free software that manages TCP/IP based routing protocols. It supports BGP4, OSPFv2, OSPFv3, ISIS, RIP, RIPng, PIM, NHRP, PBR, EIGRP and BFD.

Security Fix(es):

• frr: Reachable assertion in peek_for_as4_capability function (CVE-2022-36440)
• frr: denial of service by crafting a BGP OPEN message with an option of type 0xff (CVE-2022-40302)
• frr: denial of service by crafting a BGP OPEN message with an option of type in bgp_open_option_parse in the bgp_open.c 0xff (CVE-2022-40318)
• frr: out-of-bounds read exists in the BGP daemon of FRRouting (CVE-2022-43681)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.3 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64

Fixes

• BZ - 2168855 - BFD not working through VRF
• BZ - 2184468 - CVE-2022-36440 frr: Reachable assertion in peek_for_as4_capability function
• BZ - 2196088 - CVE-2022-43681 frr: out-of-bounds read exists in the BGP daemon of FRRouting
• BZ - 2196090 - CVE-2022-40302 frr: denial of service by crafting a BGP OPEN message with an option of type 0xff
• BZ - 2196091 - CVE-2022-40318 frr: denial of service by crafting a BGP OPEN message with an option of type in bgp_open_option_parse in the bgp_open.c 0xff
• BZ - 2216912 - SELinux is preventing FRR-Zebra to access to network namespaces.

CVEs

• CVE-2022-36440
• CVE-2022-40302
• CVE-2022-40318
• CVE-2022-43681

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.3_release_notes/index