CentOS 5 / 6 / 7 : nss / nss-util (CESA-2016:2779)

high Nessus Plugin ID 94981

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Synopsis

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

Description

An update for nss and nss-util is now available for Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6, and Red Hat Enterprise Linux 7.

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

Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications.

The nss-util packages provide utilities for use with the Network Security Services (NSS) libraries.

The following packages have been upgraded to a newer upstream version:
nss (3.21.3), nss-util (3.21.3).

Security Fix(es) :

* Multiple buffer handling flaws were found in the way NSS handled cryptographic data from the network. A remote attacker could use these flaws to crash an application using NSS or, possibly, execute arbitrary code with the permission of the user running the application. (CVE-2016-2834)

* A NULL pointer dereference flaw was found in the way NSS handled invalid Diffie-Hellman keys. A remote client could use this flaw to crash a TLS/SSL server using NSS. (CVE-2016-5285)

* It was found that Diffie Hellman Client key exchange handling in NSS was vulnerable to small subgroup confinement attack. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group. (CVE-2016-8635)

Red Hat would like to thank the Mozilla project for reporting CVE-2016-2834. The CVE-2016-8635 issue was discovered by Hubert Kario (Red Hat). Upstream acknowledges Tyson Smith and Jed Davis as the original reporter of CVE-2016-2834.

Solution

Update the affected nss and / or nss-util packages.

Plugin Details

Severity: High

ID: 94981

File Name: centos_RHSA-2016-2779.nasl

Version: 3.12

Type: local

Agent: unix

Family: CentOS Local Security Checks

Published: 11/21/2016

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

CVSS Score Source: CVE-2016-2834

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:nss-sysinit, p-cpe:/a:centos:centos:nss-tools, p-cpe:/a:centos:centos:nss, cpe:/o:centos:centos:7, cpe:/o:centos:centos:6, p-cpe:/a:centos:centos:nss-util-devel, p-cpe:/a:centos:centos:nss-devel, p-cpe:/a:centos:centos:nss-pkcs11-devel, cpe:/o:centos:centos:5, p-cpe:/a:centos:centos:nss-util

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/19/2016

Vulnerability Publication Date: 6/13/2016

Reference Information

CVE: CVE-2016-2834, CVE-2016-5285, CVE-2016-8635

RHSA: 2016:2779

Detections

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