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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.1255 A Regression in Solaris Gnome-XScreenSaver (see xscreensaver(1)) Affecting Accessibility Support and Solaris Trusted Extensions, Making Locked Desktop Screensaver Unresponsive 4 September 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Gnome-XScreenSaver Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact/Access: Denial of Service -- Existing Account Resolution: Mitigation Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-266469-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 266469 : A Regression in Solaris Gnome-XScreenSaver (see xscreensaver(1)) Affecting Accessibility Support and Solaris Trusted Extensions, Making Locked Desktop Screensaver Unresponsive Bug ID: 6839026 Product: Solaris 8 Operating System Solaris 9 Operating System Solaris 10 Operating System OpenSolaris Date of Workaround Release: 27-Aug-2009 SA Document Body Regression in Solaris Gnome-XScreenSaver (see xscreensaver(1)) ... 1. Impact A regression introduced in Solaris xscreensaver(see xscreensaver(1)) patches as defined in section 2 below, introduce multiple regressions as follows: a) When the screen is locked and Accessibility is enabled, attempts to launch Accessibility pop-up windows (screen-magnifier, on-screen keyboard etc.), may make a system unresponsive. b) When the screen is locked with Solaris Trusted Extension running, there is severe performance degradation of the CPU. [tx] Xsun consumes excessive CPU cycles and the console appears to be hung. 2. Contributing Factors These issues can occur in the following releases: SPARC Platform * X11 6.4.1 (for Solaris 8) with patch 115298-02 or later * Solaris 9 with patch 115158-11 or later * Solaris 10 with patch 120094-22 or later * OpenSolaris based upon builds snv_109 or later x86 Platform * X11 6.4.1 (for Solaris 8) with patch 115299-02 or later * Solaris 9 with patch 115159-11 or later * Solaris 10 with patch 120095-22 or later * OpenSolaris based upon builds snv_109 or later Note 1: OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived. The base build can be derived as follows: $ uname -v snv_101 Note 2: The Solaris Trusted Extensions issue only occurs on Solaris 10 and OpenSolaris systems with Trusted Extensions installed and running. To determine if Trusted Extensions is installed and running on a host, execute the following command in the global zone: $ svcs /system/labeld STATE STIME FMRI online 07:08:09 svc:/system/labeld:default If the state is disabled or if "/system/labeld" service is not listed, then the system is not configured to use Trusted Extensions. Note 3: The Accessibility issue only occurs if Accessibility support is enabled on the system. To determine if Accessibility support is enabled, launch gnome-accessibility-keyboard-properties (see gnome-accessibility-keyboard-properties(1)), see the checkbox option. 3. Symptoms When the screen is locked and xscreensaver is running, it will not be possible to type the password and unlock the screen. 4. Workaround There are three workarounds for this issue. a) killing the xscreensaver process via a remote login will resolve both the issues described by this Sun Alert. b) In the case of the accessibility issue, disable accessibility is an option if this feature is not required by the users of the system. c) Removing the affected patches as defined in section 2. However, these patches fix security issues and as such, this course of action is not recommended. 5. Resolution A final resolution is pending completion. 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 2000-2009 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. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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 iD8DBQFKoHdgNVH5XJJInbgRAh3PAJ9PSSkQzqX2mLi5hNnGvatVr/FC+ACaAqm/ JtKm96bxERMeIrJjzj4RIqk= =pG3l -----END PGP SIGNATURE-----