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Vulnerability record · CVE-2009-5138 · published 7 March 2014

CVE-2009-5138: Gnutls permissions and access controls vulnerability

Gnu · Gnutls

GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, 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, a different vulnerability than CVE-2014-1959.

5.8 CVSS 2.0 Medium EPSS 1.8% · top 22.3% CWE-264 · Permissions and access controls
5.8CVSS 2.0 base score
1.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
28References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

GnuTLS before 2.7.6, when the GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT flag is not enabled, 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, a different vulnerability than CVE-2014-1959.

AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://article.gmane.org/gmane.comp.security.oss.general/12223
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00020.html
http://rhn.redhat.com/errata/RHSA-2014-0247.html
http://secunia.com/advisories/57254
http://secunia.com/advisories/57260
http://secunia.com/advisories/57274
http://secunia.com/advisories/57321
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3351/focus=3361
http://thread.gmane.org/gmane.comp.security.oss.general/12127
https://bugzilla.redhat.com/show_bug.cgi?id=1069301
https://gitorious.org/gnutls/gnutls/commit/c8dcbedd1fdc312f5b1a70fcfbc1afe235d800cd ExploitPatch
http://article.gmane.org/gmane.comp.security.oss.general/12223
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00020.html
http://rhn.redhat.com/errata/RHSA-2014-0247.html
http://secunia.com/advisories/57254
http://secunia.com/advisories/57260
http://secunia.com/advisories/57274
http://secunia.com/advisories/57321
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3351/focus=3361
http://thread.gmane.org/gmane.comp.security.oss.general/12127
https://bugzilla.redhat.com/show_bug.cgi?id=1069301
https://gitorious.org/gnutls/gnutls/commit/c8dcbedd1fdc312f5b1a70fcfbc1afe235d800cd ExploitPatch

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-5138), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.