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Category:   Application (Generic)  >   X Vendors:   X.org
(Red Hat Issues Fix) X Input Validation Flaw in ProcRenderAddGlyphs() Lets Local Users Obtain Memory Contents and Deny Service
SecurityTracker Alert ID:  1026151
SecurityTracker URL:  http://securitytracker.com/id/1026151
CVE Reference:   CVE-2010-4819   (Links to External Site)
Date:  Oct 6 2011
Impact:   Denial of service via local system, Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in X. A local user can obtain portions of server process memory. A local user can cause denial of service conditions.

A local user can exploit a flaw in ProcRenderAddGlyphs() to cause the server process to leak arbitrary memory contents and potentially crash.

Impact:   A local user can cause denial of service conditions on the target system.

A local user can obtain portions of server process memory.

Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2011-1359.html

Vendor URL:  x.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5, 6

Message History:   This archive entry is a follow-up to the message listed below.
Oct 6 2011 X Input Validation Flaw in ProcRenderAddGlyphs() Lets Local Users Obtain Memory Contents and Deny Service



 Source Message Contents

Subject:  [RHSA-2011:1359-01] Moderate: xorg-x11-server security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: xorg-x11-server security update
Advisory ID:       RHSA-2011:1359-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-1359.html
Issue date:        2011-10-06
CVE Names:         CVE-2010-4818 CVE-2010-4819 
=====================================================================

1. Summary:

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

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
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 Desktop Optional (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, noarch, x86_64

3. Description:

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.

Multiple input sanitization flaws were found in the X.Org GLX (OpenGL
extension to the X Window System) extension. A malicious, authorized client
could use these flaws to crash the X.Org server or, potentially, execute
arbitrary code with root privileges. (CVE-2010-4818)

An input sanitization flaw was found in the X.Org Render extension. A
malicious, authorized client could use this flaw to leak arbitrary memory
from the X.Org server process, or possibly crash the X.Org server.
(CVE-2010-4819)

Users of xorg-x11-server should upgrade to these updated packages, which
contain backported patches to resolve these issues. All running X.Org
server instances must be restarted for this update to take effect.

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

5. Bugs fixed (http://bugzilla.redhat.com/):

740954 - CVE-2010-4818 X.org: multiple GLX input sanitization flaws
740961 - CVE-2010-4819 X.org: ProcRenderAddGlyphs input sanitization flaw

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xorg-x11-server-1.1.1-48.76.el5_7.5.src.rpm

i386:
xorg-x11-server-Xdmx-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xorg-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.i386.rpm

x86_64:
xorg-x11-server-Xdmx-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xorg-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xorg-x11-server-1.1.1-48.76.el5_7.5.src.rpm

i386:
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-sdk-1.1.1-48.76.el5_7.5.i386.rpm

x86_64:
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-sdk-1.1.1-48.76.el5_7.5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xorg-x11-server-1.1.1-48.76.el5_7.5.src.rpm

i386:
xorg-x11-server-Xdmx-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xorg-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.i386.rpm
xorg-x11-server-sdk-1.1.1-48.76.el5_7.5.i386.rpm

ia64:
xorg-x11-server-Xdmx-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-Xorg-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.ia64.rpm
xorg-x11-server-sdk-1.1.1-48.76.el5_7.5.ia64.rpm

ppc:
xorg-x11-server-Xdmx-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-Xorg-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.ppc.rpm
xorg-x11-server-sdk-1.1.1-48.76.el5_7.5.ppc.rpm

s390x:
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.s390x.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.s390x.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.s390x.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.s390x.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.s390x.rpm

x86_64:
xorg-x11-server-Xdmx-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xephyr-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xnest-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xorg-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xvfb-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-Xvnc-source-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-debuginfo-1.1.1-48.76.el5_7.5.x86_64.rpm
xorg-x11-server-sdk-1.1.1-48.76.el5_7.5.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

i386:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm

x86_64:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

i386:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm

noarch:
xorg-x11-server-source-1.7.7-29.el6_1.2.noarch.rpm

x86_64:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.x86_64.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

noarch:
xorg-x11-server-source-1.7.7-29.el6_1.2.noarch.rpm

x86_64:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

i386:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm

ppc64:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.ppc64.rpm

s390x:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.s390x.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.s390x.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.s390x.rpm

x86_64:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

i386:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm

noarch:
xorg-x11-server-source-1.7.7-29.el6_1.2.noarch.rpm

ppc64:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.ppc.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.ppc64.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.ppc.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.ppc64.rpm

s390x:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.s390x.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.s390x.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.s390x.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.s390x.rpm

x86_64:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

i386:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm

x86_64:
xorg-x11-server-Xephyr-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xorg-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-common-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/xorg-x11-server-1.7.7-29.el6_1.2.src.rpm

i386:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm

noarch:
xorg-x11-server-source-1.7.7-29.el6_1.2.noarch.rpm

x86_64:
xorg-x11-server-Xdmx-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xnest-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-Xvfb-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-debuginfo-1.7.7-29.el6_1.2.x86_64.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.i686.rpm
xorg-x11-server-devel-1.7.7-29.el6_1.2.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-4818.html
https://www.redhat.com/security/data/cve/CVE-2010-4819.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
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