What’s Vulnerable › Vulnerabilities

CVE-2022-36440

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-03 · updated 2026-06-17
• Weakness: CWE-617

Description

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.

Affected products

• Debian Linux: 10.0, 11.0, 12.0
• Fedoraproject Fedora: 36, 37, 38
• FRRouting: 8.3

References

• https://github.com/spwpun/pocs
• https://github.com/spwpun/pocs/blob/main/frr-bgpd.md
• https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HU4PKLUVB5CTMOVQ2GV33TNUNMJCBGD/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBXEXL2ZQBWCBLNUP6P67FHECXQWSK3L/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GM66PNHGCXZU66LQCTP2FSJLFF6CVMSI/
• https://www.debian.org/security/2023/dsa-5495
• https://github.com/spwpun/pocs
• https://github.com/spwpun/pocs/blob/main/frr-bgpd.md
• https://lists.debian.org/debian-lts-announce/2023/09/msg00020.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3HU4PKLUVB5CTMOVQ2GV33TNUNMJCBGD/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBXEXL2ZQBWCBLNUP6P67FHECXQWSK3L/

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