CVE-2022-36440

A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function. Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in DoS.

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 AlmaLinux Release Notes linked from the References section.

• CVE-2022-36440: fix heap-buffer-overflow in peek_for_as4_capability when reading BGP OPEN extended optional parameters
• CVE-2023-31490: fix insufficient stream data validation in BGP prefix SID attributes processing
• CVE-2023-38407: fix out-of-bounds read in BGP labeled unicast parsing
• CVE-2023-41909: fix implicit withdrawal handling for BGP flowspec without attributes

A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek_for_as4_capability function. Attackers can maliciously construct BGP open packets and send them to BGP peers running frr-bgpd, resulting in DoS.