Scientific Linux Security Update : gnutls on SL6.x i386/x86_64

This script is Copyright (C) 2015 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

It was found that GnuTLS did not check activation and expiration dates
of CA certificates. This could cause an application using GnuTLS to
incorrectly accept a certificate as valid when its issuing CA is
already expired. (CVE-2014-8155)

It was found that GnuTLS did not verify whether a hashing algorithm
listed in a signature matched the hashing algorithm listed in the
certificate. An attacker could create a certificate that used a
different hashing algorithm than it claimed, possibly causing GnuTLS
to use an insecure, disallowed hashing algorithm during certificate
verification. (CVE-2015-0282)

It was discovered that GnuTLS did not check if all sections of X.509
certificates indicate the same signature algorithm. This flaw, in
combination with a different flaw, could possibly lead to a bypass of
the certificate signature check. (CVE-2015-0294)

The CVE-2014-8155 issue was discovered by Marcel Kolaja of Red Hat.
The CVE-2015-0282 and CVE-2015-0294 issues were discovered by Nikos
Mavrogiannopoulos of the Red Hat Security Technologies Team.

This update also fixes the following bug :

- Previously, under certain circumstances, the certtool
utility could generate X.509 certificates which
contained a negative modulus. Consequently, such
certificates could have interoperation problems with the
software using them. The bug has been fixed, and
certtool no longer generates X.509 certificates
containing a negative modulus.

See also :

http://www.nessus.org/u?79c875b8

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 85193 ()

Bugtraq ID:

CVE ID: CVE-2014-8155
CVE-2015-0282
CVE-2015-0294

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