RHEL 5 / 6 : xorg-x11-server (RHSA-2013:1426)

Medium Nessus Plugin ID 70451


The remote Red Hat host is missing one or more security updates.


Updated xorg-x11-server packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having important 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 use-after-free flaw was found in the way the X.Org server handled ImageText requests. A malicious, authorized client could use this flaw to crash the X.Org server or, potentially, execute arbitrary code with root privileges. (CVE-2013-4396)

Red Hat would like to thank the X.Org security team for reporting this issue. Upstream acknowledges Pedro Ribeiro as the original reporter.

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


Update the affected packages.

See Also



Plugin Details

Severity: Medium

ID: 70451

File Name: redhat-RHSA-2013-1426.nasl

Version: $Revision: 1.7 $

Type: local

Agent: unix

Published: 2013/10/16

Modified: 2017/01/05

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.5

Temporal Score: 4.8

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xdmx, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xephyr, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xnest, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xorg, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xvfb, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-Xvnc-source, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-common, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-debuginfo, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-devel, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-sdk, p-cpe:/a:redhat:enterprise_linux:xorg-x11-server-source, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:6.4

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2013/10/15

Reference Information

CVE: CVE-2013-4396

BID: 62892

OSVDB: 98314

RHSA: 2013:1426