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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0825 -- [Solaris] A Security Vulnerability in the Solaris NFS Kernel Module May Lead to a System Panic, Resulting in a Denial of Service (DoS) 1 September 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Solaris NFS kernel module Publisher: Sun Microsystems Operating System: Solaris Impact: Denial of Service Access: Existing Account CVE Names: CVE-2008-3839 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-241066-1 Revision History: September 1 2008: Added CVE Reference August 25 2008: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 241066 : A Security Vulnerability in the Solaris NFS Kernel Module May Lead to a System Panic, Resulting in a Denial of Service (DoS) Bug ID: 6614416 Product Solaris 10 Operating System OpenSolaris Date of Resolved Release: 22-Aug-2008 SA Document Body A Security Vulnerability in the Solaris NFS Kernel Module: 1. Impact A security vulnerability in the Solaris NFS kernel module on Solaris 10 systems with kernel patches 120011-14 (SPARC) and 120012-14 (x86), may allow a local unprivileged user to cause an NFS server to panic, resulting in a Denial of Service (DoS). 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 10 with patch 120011-14 and without patch 138070-02 * OpenSolaris based upon builds snv_59 through snv_87 x86 Platform * Solaris 10 with patch 120012-14 and without patch 138071-02 * OpenSolaris based upon builds snv_59 through snv_87 Note 1: Solaris 8 and Solaris 9 are not impacted by this issue. Note 2: 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 To determine if a system has a Package Repository Update (PRU) installed that addresses this issue, execute the following command: $ pkg contents -o name,value -t set | grep 6614416 com.sun.service.incorporated_changes 6614416 3. Symptoms If the described issue occurs, the NFS server system may panic with a stack trace similar to the following: > $C db66a878 cdev_ioctl+0x16(1a000a0, 422, 0, 80100000, dc78e338, db66a960) db66a964 spec_fsync+0xd5(dc949d80, 10000, dc78e338) db66a988 fop_fsync+0x1b(dc949d80, 10000, dc78e338) db66aac8 rfs3_mknod+0x26d(db66aaf0, db66abc8, dc93f380, db66ad9c, dc78e338) db66ad24 common_dispatch+0x3f9() db66ad44 rfs_dispatch+0x1c(db66ad9c, cd690740) db66add0 svc_getreq+0x158(cd690740, cd7d2340) db66adf8 svc_run+0x125(db8312c0) db66ae0c svc_do_run+0x6b(1) db66af84 nfssys+0x4cf()db66afac sys_sysenter+0x101() 4. Workaround To work around the described issue, share the NFS file system with "-o nodevices" option. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 10 with patch 138070-02 or later * OpenSolaris based upon builds snv_88 or later x86 Platform * Solaris 10 with patch 138071-02 or later * OpenSolaris based upon builds snv_88 or later For more information on Security Sun Alerts, see Technical Instruction ID 213557. 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 2000-2008 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 iQCVAwUBSLtimyh9+71yA2DNAQKytgP/aUmZzU5PjQw1Pv5VGOvKmORS+h+SyUlE zutTC80O2QNUUe0sI/Dz6hJW+zdQh5JXaj80GuYN+StemYlRlo8MWkol+dRHjO1H JQKxArVzrmd2PCGm56WWCqiZFV/nHz/hQBLS2RYs7wPyA8kgc29+KcaF+Q/UuPYb s2VuglEyevk= =n4AE -----END PGP SIGNATURE-----