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Red Hat: RHSA-2011:0433-01 Moderate: Xorg Code Execution Risk

red hat
Calendar Grey April 11, 2011
Dist Redhat Esm H88
Significant security patch for xorg-x11-server-tools addresses major vulnerability in Fedora distributions. Ensure updates are installed swiftly.
An updated xorg-x11-server-utils package that fixes one security issue is now available for Red Hat Enterprise Linux 5 and 6

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

The xorg-x11-server-utils package contains a collection of utilities used to modify and query the runtime configuration of the X.Org server. X.Org is an open source implementation of the X Window System.
A flaw was found in the X.Org X server resource database utility, xrdb. Certain variables were not properly sanitized during the launch of a user's graphical session, which could possibly allow a remote attacker to execute arbitrary code with root privileges, if they were able to make the display manager execute xrdb with a specially-crafted X client hostname. For example, by configuring the hostname on the target system via a crafted DHCP reply, or by using the X Display Manager Control Protocol (XDMCP) to connect to that system from a host that has a special DNS name. (CVE-2011-0465)
Red Hat would like to thank Matthieu Herrb for reporting this issue. Upstream acknowledges Sebastian Krahmer of the SuSE Security Team as the original reporter.
Users of xorg-x11-server-utils should upgrade to this updated package, which contains a backported patch to resolve this issue. All running X.Org server instances must be restarted for this update to take effect.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat code execution software package Xorg

References

https://access.redhat.com/security/cve/CVE-2011-0465 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: xorg-x11-server-utils-7.1-5.el5_6.1.i386.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.i386.rpm
x86_64: xorg-x11-server-utils-7.1-5.el5_6.1.x86_64.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: xorg-x11-server-utils-7.1-5.el5_6.1.i386.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.i386.rpm
ia64: xorg-x11-server-utils-7.1-5.el5_6.1.ia64.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.ia64.rpm
ppc: xorg-x11-server-utils-7.1-5.el5_6.1.ppc.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.ppc.rpm
s390x: xorg-x11-server-utils-7.1-5.el5_6.1.s390x.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.s390x.rpm
x86_64: xorg-x11-server-utils-7.1-5.el5_6.1.x86_64.rpm xorg-x11-server-utils-debuginfo-7.1-5.el5_6.1.x86_64.rpm
Red Hat Enterprise Linux Desktop (v. 6):
Source:
i386: xorg-x11-server-utils-7.4-15.el6_0.1.i686.rpm xorg-x11-server-utils-debuginfo-7.4-15.el6_0.1.i686.rpm
x86_64: xorg-x11-server-utils-7.4-15.el6_0.1.x86_64.rpm xorg-x11-server-utils-debuginfo-7.4-15.el6_0.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
x86_64: xorg-x11-server-utils-7.4-15.el6_0.1.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2011:0433-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0433.html
Issue date: 2011-04-11

Topic

An updated xorg-x11-server-utils package that fixes one security issue isnow available for Red Hat Enterprise Linux 5 and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat code execution software package Xorg

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Bugs Fixed

680196 - CVE-2011-0465 xorg: xrdb code execution via crafted X client hostname

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