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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2006.0848 -- [Solaris] Security Vulnerability With Integer Multiplication Within libXfont Affects Solaris X11 Servers 12 March 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Solaris 9, Solaris 10, Solaris 8 Operating Systems Publisher: Sun Microsystems Operating System: Solaris Impact: Increased Privileges Execute Arbitrary Code/Commands Denial of Service Access: Remote/Unauthenticated CVE Names: CVE-2006-3467 Ref: ESB-2006.0662 ESB-2006.0661 ESB-2006.0597 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102714-1 Revision History: March 12 2007: Resolved by Sun. January 24 2006: Updated to reference X.Org patches November 20 2006: Updated details, patch released. November 16 2006: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Sun(sm) Alert Notification * Sun Alert ID: 102714 * Synopsis: Security Vulnerability With Integer Multiplication Within libXfont Affects Solaris X11 Servers * Category: Security * Product: Solaris 9 Operating System, Solaris 10 Operating System, Solaris 8 Operating System * BugIDs: 6465806, 6465805 * Avoidance: Patch, Workaround * State: Resolved * Date Released: 14-Nov-2006, 09-Mar-2007 * Date Closed: 09-Mar-2007 * Date Modified: 16-Nov-2006, 22-Jan-2007, 09-Mar-2007 1. Impact The Xsun(1) server and Xorg(1) server are the X display servers for Version 11 of the X window system on Solaris. There exists an overflow vulnerability when performing integer multiplication within the libXfont library, as used by the X11 display servers, that can cause a heap overflow while loading the fonts. This may allow a local unprivileged user to be able to execute arbitrary commands with elevated privileges or create a Denial of Service (DoS) to the display managers. This issue is described in the following documents: * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3467 * http://www.idefense.com/intelligence/vulnerabilities/display.ph p?id=412 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 8 without patch 119067-04 * Solaris 9 without patch 112785-57 * Solaris 10 without patch 119059-19 x86 Platform * Solaris 8 without patch 119068-04 * Solaris 9 without patch 112786-46 * JDS release 2 (for Solaris 9) without patch 124833-01 * Solaris 10 without patch 119060-18 * Solaris 10 with X.Org without patches 119060-18 and 119062-02 Note: Xorg(1) is not shipped in Solaris 8 To determine the version of JDS that is currently installed on the system, run the following command (output will vary by platform): % grep platform /usr/share/gnome/gnome-about/gnome-version.xml <platform>2</platform> Alternatively (for the same results), in a terminal window from within the GNOME desktop, the following command can be run: % /usr/bin/gnome-about 3. Symptoms There are no predictable symptoms that would indicate that this issue has been exploited to execute arbitrary commands with elevated privileges. The symptom of the Denial of Service (DoS) would be the absence of either the Xsun(1) or Xorg(1) server running on the system. 4. Relief/Workaround To prevent this issue from being exploited to execute arbitrary commands with elevated privileges, the setuid(2) bit can be removed from the Xorg server and the Xsun server on the x86 platform and the setgid(2) bit can be removed from the Xsun server on the SPARC platform. For example: # chmod 0755 /usr/openwin/bin/Xsun # chmod 0755 /usr/X11/bin/Xorg Note 1: Performing the above procedure will disable the following: * The ability to start either the Xsun(1) or Xorg(1) server from the command line for non-root users on the Solaris x86 platform. * The ability of Xsun(1) and Xorg(1) to open Unix domain sockets and named pipe transports in the protected "/tmp/.X11-*" directories. * The ability to configure Power Management and Interactive Process Priority control on Solaris SPARC. These features will still be available to Xsun and Xorg when started via a display manager such as dtlogin(1), gdm(1), or xdm(1). Note 2: There is no workaround to prevent this issue from being exploited to cause a Denial Of Service to the X Servers. Note 3: The "chmod" command for Xorg(1) is applicable only to Solaris 9 and 10. Note 4: Local users on the console of a system using an X display manager and Sun Ray users may still be able to exploit this vulnerability to execute arbitrary commands with elevated privileges even if the setuid and setgid permissions have been removed from the Xsun and Xorg binaries. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 8 with patch 119067-04 or later * Solaris 9 with patch 112785-57 or later * Solaris 10 with patch 119059-19 or later x86 Platform * Solaris 8 with patch 119068-04 or later * Solaris 9 with patch 112786-46 or later * JDS release 2 (for Solaris 9) with patch 124833-01 or later * Solaris 10 with patch 119060-18 or later * Solaris 10 with X.Org patches 119060-18 or later and 119062-02 or later Change History 16-Nov-2006: * Updated Contributing Factors, Relief/Workaround, and Resolution sections 22-Jan-2007: * Updated Contributing Factors and Resolution sections 09-Mar-2007: * State: Resolved * Updated Contributing Factors and Relief/Workaround sections 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRfTl0yh9+71yA2DNAQJKPQP/a83CjyECh6T5flQ5IPDZ5vMshWG2exI8 eUHm0UNhMmvBVkdhKOthWCAAEHzblN2Glk+8UiAcU1XzdcrGsQWBdnIx5AvohvhZ MwF3grecK1eD6d8762atOuj+BCAaq7DRiduSlLrw8AMo+8cakGWy0iucx8bXfMHZ zHANRoCZcSs= =JoSR -----END PGP SIGNATURE-----