CVE-2009-5138
gnutls: incorrect handling of V1 intermediate certificates
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · January 9, 2009
Updated · November 21, 2025
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.
Statement
This issue did not affect the versions of gnutls as shipped with Red Hat Enterprise Linux 6.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 5.8AV:N/AC:M/Au:N/C:P/I:P/A:N
CWE-295 · Improper Certificate Validation