Debian DSA-2869-1 : gnutls26 - incorrect certificate verification

Medium Nessus Plugin ID 72782


The remote Debian host is missing a security-related update.


Nikos Mavrogiannopoulos of Red Hat discovered an X.509 certificate verification issue in GnuTLS, an SSL/TLS library. A certificate validation could be reported sucessfully even in cases were an error would prevent all verification steps to be performed.

An attacker doing a man-in-the-middle of a TLS connection could use this vulnerability to present a carefully crafted certificate that would be accepted by GnuTLS as valid even if not signed by one of the trusted authorities.


Upgrade the gnutls26 packages.

For the oldstable distribution (squeeze), this problem has been fixed in version 2.8.6-1+squeeze3.

For the stable distribution (wheezy), this problem has been fixed in version 2.12.20-8+deb7u1.

See Also

Plugin Details

Severity: Medium

ID: 72782

File Name: debian_DSA-2869.nasl

Version: 1.8

Type: local

Agent: unix

Published: 2014/03/04

Updated: 2020/03/12

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:gnutls26, cpe:/o:debian:debian_linux:6.0, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2014/03/03

Reference Information

CVE: CVE-2014-0092

BID: 65919

DSA: 2869