CVE-2022-40318

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.

Bugs

• <https://github.com/FRRouting/frr/issues/13480&gt;
• <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1035829&gt;

Notes