Scientific Linux Security Update : gnutls on SL6.x i386/x86_64 (20150722)

high Nessus Plugin ID 85193
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?b0ed9c7d

Plugin Details

Severity: High

ID: 85193

File Name: sl_20150722_gnutls_on_SL6_x.nasl

Version: 2.5

Type: local

Agent: unix

Published: 8/4/2015

Updated: 1/14/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vulnerability Information

CPE: p-cpe:/a:fermilab:scientific_linux:gnutls, p-cpe:/a:fermilab:scientific_linux:gnutls-debuginfo, p-cpe:/a:fermilab:scientific_linux:gnutls-devel, p-cpe:/a:fermilab:scientific_linux:gnutls-guile, p-cpe:/a:fermilab:scientific_linux:gnutls-utils, x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 7/22/2015

Vulnerability Publication Date: 3/24/2015

Reference Information

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