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CentOS 6 / 7 : gnutls (CESA-2016:0012) (SLOTH)

medium Nessus Plugin ID 87785

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

Updated gnutls packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7.

Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

The GnuTLS library provides support for cryptographic algorithms and for protocols such as Transport Layer Security (TLS).

A flaw was found in the way TLS 1.2 could use the MD5 hash function for signing ServerKeyExchange and Client Authentication packets during a TLS handshake. A man-in-the-middle attacker able to force a TLS connection to use the MD5 hash function could use this flaw to conduct collision attacks to impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575)

All gnutls users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. For the update to take effect, all applications linked to the GnuTLS library must be restarted.

Solution

Update the affected gnutls packages.

See Also

http://www.nessus.org/u?d37fe5fb

http://www.nessus.org/u?cbe9e6a0

Plugin Details

Severity: Medium

ID: 87785

File Name: centos_RHSA-2016-0012.nasl

Version: 2.14

Type: local

Agent: unix

Published: 1/8/2016

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: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2015-7575

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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:7, p-cpe:/a:centos:centos:gnutls-dane, p-cpe:/a:centos:centos:gnutls-guile, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:gnutls-devel, p-cpe:/a:centos:centos:gnutls-utils, p-cpe:/a:centos:centos:gnutls-c%2b%2b

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/7/2016

Vulnerability Publication Date: 1/9/2016

Reference Information

CVE: CVE-2015-7575

RHSA: 2016:0012