Input validation error in GnuTLS - CVE-2015-6251
Published: August 24, 2015 / Updated: July 28, 2020
Vulnerability identifier: #VU32394
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-6251
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service via a long DistinguishedName (DN) entry in a certificate.
Affected software
GnuTLS
gnutls (Alpine package)
gnutls
Slackware Linux
Fedora
gnutls (Alpine package)
gnutls
Slackware Linux
Fedora
How to mitigate CVE-2015-6251
Update to version 3.3.17.
GnuTLS - update to 3.3.17
gnutls (Alpine package) - update to 3.2.15-r1
gnutls - addressed in versions 3.3.17-1.fc21, 3.3.17-1.fc22, 3.4.4-1.fc23
gnutls (Alpine package) - update to 3.2.15-r1
gnutls - addressed in versions 3.3.17-1.fc21, 3.3.17-1.fc22, 3.4.4-1.fc23
External References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-September/165286.html
- http://lists.opensuse.org/opensuse-updates/2015-09/msg00001.html
- http://www.debian.org/security/2015/dsa-3334
- http://www.gnutls.org/security.html#GNUTLS-SA-2015-3
- http://www.openwall.com/lists/oss-security/2015/08/10/1
- http://www.openwall.com/lists/oss-security/2015/08/17/6
- http://www.securityfocus.com/bid/76267
- http://www.securitytracker.com/id/1033226
- https://bugzilla.redhat.com/show_bug.cgi?id=1251902
- https://gitlab.com/gnutls/gnutls/commit/272854367efc130fbd4f1a51840d80c630214e12