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AUSCERT External Security Bulletin Redistribution
ESB-2007.0054 -- [Solaris]
Two Integer Overflow Vulnerabilities Found in the Xorg(1) X Server
12 March 2007
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AusCERT Security Bulletin Summary
---------------------------------
Product: Xorg X Server
Publisher: Sun Microsystems
Operating System: Solaris 10
Solaris 9
Impact: Root Compromise
Access: Existing Account
CVE Names: CVE-2006-3740 CVE-2006-3739
Ref: ESB-2006.0655
Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102780-1
Revision History: March 12 2007: Resolved by Sun
January 25 2007: Initial Release
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Sun(sm) Alert Notification
* Sun Alert ID: 102780
* Synopsis: Two Integer Overflow Vulnerabilities Found in the
Xorg(1) X Server
* Category: Security
* Product: Solaris 9 Operating System, Solaris 10 Operating System
* BugIDs: 6464170, 6464172
* Avoidance: Patch, Workaround
* State: Resolved
* Date Released: 23-Jan-2007, 08-Mar-2007
* Date Closed: 08-Mar-2007
* Date Modified: 08-Mar-2007
1. Impact
Two integer overflows, one in the CIDAFM() function and one in the
scan_cidfont() function, have been found in the Xorg X server (see
Xorg(1)) which may allow a local unprivileged user the ability to
execute arbitrary code with the privileges of the Xorg server. The
Xorg X server runs with root privileges on Solaris.
These issues are described in the following documents:
CVE-2006-3739 at:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3739
CVE-2006-3740 at:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3740
iDefense Multiple Vendor X Server CID-keyed Fonts 'CIDAFM()' Integer
Overflow Vulnerability at:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id
=412
Multiple Vendor X Server CID-keyed Fonts 'scan_cidfont()' Integer
Overflow Vulnerability at:
http://www.idefense.com/intelligence/vulnerabilities/display.php?id
=411
2. Contributing Factors
These issues can occur in the following releases:
x86 Platform
* Solaris 9 without patch 124833-01
* Solaris 10 without patch 119062-02
Notes:
1. Solaris 8 on the x86 platform is not affected by this issue.
2. Solaris on the SPARC platform is not affected by this issue.
3. Solaris 9 on the x86 platform does not ship with the Xorg X server
by default but is present if the unbundled Sun Java Desktop System
(JDS) Release 2 was downloaded and installed.
To determine if JDS Release 2 is installed on a Solaris 9 x86 system,
the following command can be run:
$ grep distributor-version /usr/share/gnome-about/gnome-version.xml
<distributor-version>Sun Java Desktop System, Release 2</distributor-versio
n>
4. The described issues only occur on systems with the SUNWxorg
packages installed. To determine if the SUNWxorg packages are
installed on the system, the following command can be used:
$ pkginfo SUNWxorg-server
system SUNWxorg-server X.Org Foundation Xserver
3. Symptoms
There are no predictable symptoms that would indicate the described
issues have been exploited to execute arbitrary commands with root
privileges.
4. Relief/Workaround
To work around the described issues until the patch can be applied,
the following entry for the Type 1 font module can be removed or
commented out (by inserting a '#' at the beginning line) from the
xorg.conf(4) file:
Load "type1"
Note: After applying this workaround, applications which require Type
1 fonts may not display the text properly.
5. Resolution
These issues are addressed in the following releases:
x86 Platform
* Solaris 9 with patch 124833-01 or later
* Solaris 10 with patch 119062-02 or later
Change History
08-Mar-2007:
* Updated Contributing Factors and Resolution sections
* State: Resolved
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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