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CentOS 6 : gnutls (CESA-2015:1457)
high Nessus Plugin ID 85023
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Synopsis
The remote CentOS host is missing one or more security updates.Description
Updated gnutls packages that fix three security issues and one bug are now available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS).
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.
(BZ#1036385)
Users of gnutls are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
Solution
Update the affected gnutls packages.See Also
Plugin Details
Severity: High
ID: 85023
File Name: centos_RHSA-2015-1457.nasl
Version: 2.7
Type: local
Agent: unix
Family: CentOS Local Security Checks
Published: 7/28/2015
Updated: 1/4/2021
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2015-0282
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:centos:centos:gnutls, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:gnutls-guile, p-cpe:/a:centos:centos:gnutls-devel, p-cpe:/a:centos:centos:gnutls-utils
Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 7/26/2015
Vulnerability Publication Date: 3/24/2015
Reference Information
CVE: CVE-2014-8155, CVE-2015-0282, CVE-2015-0294
RHSA: 2015:1457