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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.1094.2 Security Vulnerability in Solaris Auditing Related to Extended File Attributes May Allow Local Unprivileged Users to Panic the System 28 July 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Solaris 9 Solaris 10 OpenSolaris Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact/Access: Denial of Service -- Existing Account Resolution: Patch CVE Names: CVE-2009-2596 Original Bulletin: http://sunsolve.sun.com/search/document.do?assetkey=1-66-264428-1 Revision History: July 28 2009: CVE Added July 27 2009: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type Sun Alert Solution 264428 : Security Vulnerability in Solaris Auditing Related to Extended File Attributes May Allow Local Unprivileged Users to Panic the System Bug ID 6795688 Product Solaris 9 Solaris 10 OpenSolaris Date of Resolved Release 23-Jul-2009 SA Document Body Security Vulnerability in Solaris Auditing Related to Extended File Attributes ... (see below) 1. Impact A security vulnerability in Solaris Auditing when interacting with extended file attributes (fsattr(5)) may allow a local unprivileged user to be able to panic the system. The ability to panic a system is a type of Denial of Service (DoS). 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 9 without patch 122300-39 * Solaris 10 without patch 140921-01 * OpenSolaris based upon builds snv_01 through snv_120 x6 Platform * Solaris 9 without patch 122301-39 * Solaris 10 without patch 140922-01 * OpenSolaris based upon builds snv_01 through snv_120 Notes: 1. Solaris 8 is not impacted by this issue. 2. This issue only affects systems which have Solaris Auditing (see bsmconv(1M)) enabled. To determine if a system has Solaris Auditing enabled the grep(1) command can be used to search the '/etc/system' file for a reference to the c2audit kernel module as in the following example: $ grep c2audit /etc/system set c2audit:audit_load = 1 3. OpenSolaris distributions may include additional bug fixes above and beyond the build from which it was derived. To determine the base build of OpenSolaris, the following command can be used: $ uname -v snv_86 3. Symptoms If the system panics due to this issue an error message will be generated which looks similar to the following: panic[cpu0]/thread=300018a26a0: BAD TRAP: type=31 rp=2a10033b820 addr=0 mmu_fsr=0 occurred in module "unix" due to a NULL pointer dereference and the stack backtrace will reference audit_setfsat_path() after an earlier call to one of the extended attribute (fsattr(5)) functions like fchownat(2) in the following example: die() trap() ktl0() audit_setfsat_path() [...] fchownat() 4. Workaround To prevent this issue from occurring Solaris Auditing can be disabled (see bsmunconv(1M)). 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 9 with patch 122300-39 or later * Solaris 10 with patch 140921-01 or later * OpenSolaris based upon builds snv_121 or later x86 Platform * Solaris 9 with patch 122301-39 or later * Solaris 10 with patch 140922-01 or later * OpenSolaris based upon builds snv_121 or later For more information on Security Sun Alerts, see Technical Instruction ID 213557 http://sunsolve.sun.com/search/document.do?assetkey=1-61-213557-1 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 iD8DBQFKbpJZNVH5XJJInbgRAgVsAJ0bd1ymexm7chQnRMx6wiEoCBYiiQCgggm1 UoWj++hCVSa3aTO1wFqnui0= =Fe57 -----END PGP SIGNATURE-----