CentOS 6 / 7 : xorg-x11-server (CESA-2015:0797)

medium Nessus Plugin ID 82714

Synopsis

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

Description

Updated xorg-x11-server 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.

X.Org is an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.

A buffer over-read flaw was found in the way the X.Org server handled XkbGetGeometry requests. A malicious, authorized client could use this flaw to disclose portions of the X.Org server memory, or cause the X.Org server to crash using a specially crafted XkbGetGeometry request. (CVE-2015-0255)

This issue was discovered by Olivier Fourdan of Red Hat.

All xorg-x11-server users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

Solution

Update the affected xorg-x11-server packages.

See Also

http://www.nessus.org/u?efc5a690

http://www.nessus.org/u?95583517

Plugin Details

Severity: Medium

ID: 82714

File Name: centos_RHSA-2015-0797.nasl

Version: 1.8

Type: local

Agent: unix

Published: 4/13/2015

Updated: 1/4/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2015-0255

Vulnerability Information

CPE: p-cpe:/a:centos:centos:xorg-x11-server-Xdmx, p-cpe:/a:centos:centos:xorg-x11-server-Xephyr, p-cpe:/a:centos:centos:xorg-x11-server-Xnest, p-cpe:/a:centos:centos:xorg-x11-server-Xorg, p-cpe:/a:centos:centos:xorg-x11-server-Xvfb, p-cpe:/a:centos:centos:xorg-x11-server-common, p-cpe:/a:centos:centos:xorg-x11-server-devel, p-cpe:/a:centos:centos:xorg-x11-server-source, cpe:/o:centos:centos:6, cpe:/o:centos:centos:7

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/10/2015

Vulnerability Publication Date: 2/13/2015

Reference Information

CVE: CVE-2015-0255

RHSA: 2015:0797