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Red Hat Enterprise Linux 4: RHSA-2011:1155-01 Critical Update for xorg-x11

red hat
Calendar Grey August 11, 2011
Dist Redhat Esm H88
Urgent notice for xorg-x11 on Red Hat fixes a security vulnerability allowing local code execution. Update immediately!
Updated xorg-x11 packages that fix one security issue are now available for Red Hat Enterprise Linux 4

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

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. These xorg-x11 packages also provide the X.Org libXfont runtime library.
A buffer overflow flaw was found in the way the libXfont library, used by the X.Org server, handled malformed font files compressed using UNIX compress. A malicious, local user could exploit this issue to potentially execute arbitrary code with the privileges of the X.Org server. (CVE-2011-2895)
Users of xorg-x11 should upgrade to these updated packages, which contain a backported patch to resolve this issue. All running X.Org server instances must be restarted for the update to take effect.

Topics%20covered

Topics Covered

security advisory buffer overflow Red Hat Enterprise Linux important update xorg-x11 local exploit risk

References

https://access.redhat.com/security/cve/CVE-2011-2895 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: xorg-x11-6.8.2-1.EL.69.i386.rpm xorg-x11-Mesa-libGL-6.8.2-1.EL.69.i386.rpm xorg-x11-Mesa-libGLU-6.8.2-1.EL.69.i386.rpm xorg-x11-Xdmx-6.8.2-1.EL.69.i386.rpm xorg-x11-Xnest-6.8.2-1.EL.69.i386.rpm xorg-x11-Xvfb-6.8.2-1.EL.69.i386.rpm xorg-x11-deprecated-libs-6.8.2-1.EL.69.i386.rpm xorg-x11-deprecated-libs-devel-6.8.2-1.EL.69.i386.rpm xorg-x11-devel-6.8.2-1.EL.69.i386.rpm xorg-x11-doc-6.8.2-1.EL.69.i386.rpm xorg-x11-font-utils-6.8.2-1.EL.69.i386.rpm xorg-x11-libs-6.8.2-1.EL.69.i386.rpm xorg-x11-sdk-6.8.2-1.EL.69.i386.rpm xorg-x11-tools-6.8.2-1.EL.69.i386.rpm xorg-x11-twm-6.8.2-1.EL.69.i386.rpm xorg-x11-xauth-6.8.2-1.EL.69.i386.rpm xorg-x11-xdm-6.8.2-1.EL.69.i386.rpm xorg-x11-xfs-6.8.2-1.EL.69.i386.rpm
ia64: xorg-x11-6.8.2-1.EL.69.ia64.rpm xorg-x11-Mesa-libGL-6.8.2-1.EL.69.i386.rpm xorg-x11-Mesa-libGL-6.8.2-1.EL.69.ia64.rpm xorg-x11-Mesa-libGLU-6.8.2-1.EL.69.i386.rpm xorg-x11-Mesa-libGLU-6.8.2-1.EL.69.ia64.rpm xorg-x11-Xdmx-6.8.2-1.EL.69.ia64.rpm xorg-x11-Xnest-6.8.2-1.EL.69.ia64.rpm xorg-x11-Xvfb-6.8.2-1.EL.69.ia64.rpm xorg-x11-deprecated-libs-6.8.2-1.EL.69.i386.rpm xorg-x11-deprecated-libs-6.8.2-1.EL.69.ia64.rpm xorg-x11-deprecated-libs-devel-6.8.2-1.EL.69.ia64.rpm xorg-x11-devel-6.8.2-1.EL.69.ia64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2011:1155-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1155.html
Issue date: 2011-08-11

Topic

Updated xorg-x11 packages that fix one security issue are now available forRed Hat Enterprise Linux 4.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory buffer overflow Red Hat Enterprise Linux important update xorg-x11 local exploit risk

Relevant Releases Architectures

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Bugs Fixed

725760 - CVE-2011-2895 libXfont: LZW decompression heap corruption / infinite loop

727624 - CVE-2011-2895 BSD compress LZW decoder buffer overflow

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