CVE-2022-40318

Name	CVE-2022-40318
Description	An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case. NOTE: this behavior occurs in bgp_open_option_parse in the bgp_open.c file, a different location (with a different attack vector) relative to CVE-2022-40302.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	1035829

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
frr (PTS)	buster	6.0.2-2+deb10u1	vulnerable
	buster (security)	6.0.2-2+deb10u2	vulnerable
	bullseye (security), bullseye	7.5.1-1.1+deb11u1	vulnerable
	bookworm, sid	8.4.2-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
frr	source	(unstable)	(unfixed)			1035829

Notes

https://github.com/FRRouting/frr/issues/13427
https://github.com/FRRouting/frr/issues/13480
Fixes for CVE-2022-43681/CVE-2022-40318/CVE-2022-40302:
https://github.com/FRRouting/frr/commit/1117baca3c592877a4d8a13ed6a1d9bd83977487 (base_8.4)
https://github.com/FRRouting/frr/commit/3e46b43e3788f0f87bae56a86b54d412b4710286 (base_8.4)
https://github.com/FRRouting/frr/commit/766eec1b7accffe2c04a5c9ebb14e9f487bb9f78 (base_8.5)