{"id":"UBUNTU-CVE-2014-1959","details":"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.","modified":"2026-04-22T09:37:11.981624Z","published":"2014-02-21T00:00:00Z","related":["USN-2121-1"],"upstream":["CVE-2014-1959"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2014-1959"},{"type":"REPORT","url":"https://www.gitorious.org/gnutls/gnutls/commit/b1abfe3d18"},{"type":"REPORT","url":"http://gnutls.org/security.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2121-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2014-1959"}],"affected":[{"package":{"name":"gnutls26","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/gnutls26@2.12.23-12ubuntu1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12.23-12ubuntu1"}]}],"versions":["2.12.23-1ubuntu4","2.12.23-1ubuntu5"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.0.11+really2.12.23-12ubuntu1","binary_name":"gnutls-bin"},{"binary_version":"2.12.23-12ubuntu1","binary_name":"libgnutls-openssl27"},{"binary_name":"libgnutls26","binary_version":"2.12.23-12ubuntu1"},{"binary_name":"libgnutlsxx27","binary_version":"2.12.23-12ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2014/UBUNTU-CVE-2014-1959.json"}}],"schema_version":"1.7.5","severity":[{"type":"Ubuntu","score":"medium"}]}