Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0214 -- [Solaris] Denial of Service (DoS) Vulnerability in NFSv4 Server Kernel Module 13 March 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: NFSv4 Publisher: Sun Microsystems Operating System: OpenSolaris based on builds snv_01 through snv_110 Solaris 10 Impact: Denial of Service Access: Existing Account CVE Names: CVE-2009-0870 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-252469-1 Revision History: March 13 2009: Added CVE March 9 2009: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 252469 : Denial of Service (DoS) Vulnerability in NFSv4 Server Kernel Module Bug ID: 6793049 Product Solaris 10 Operating System OpenSolaris Date of Resolved Release: 6-Mar-2009 SA Document Body A security vulnerability in NFSv4 Server Kernel Module: 1. Impact A security vulnerability in the NFSv4 Server Kernel Module may allow a local unprivileged user to hang an NFSv4 server if that server is sharing an hsfs(7FS) file system (CD-ROM, DVD media). This is a type of Denial of Service (DoS). 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 10 without patch 139462-02 * OpenSolaris based upon builds snv_01 through snv_110 x86 Platform * Solaris 10 without patch 139463-02 * OpenSolaris based upon builds snv_01 through snv_110 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 Note 3: This issue only occurs on systems that are configured as a NFSv4 server and share a hsfs(7FS) file system. To determine if a system is configured as a NFSv4 server, the following command can be used: # rpcinfo -l localhost nfs 4 program vers tp_family/name/class address service 100003 4 inet/tcp/cots_ord 127.0.0.1.8.1 nfs To determine if a NFSv4 server is sharing a hsfs(7FS) file system, the following command can be used: # df -F hsfs `cut -f1 /etc/dfs/sharetab` 2>/dev/null /cdrom/s10_software_companion(/vol/dev/dsk/c0t0d0/s10_software_companion): 0 blocks 0 files 3. Symptoms If the described issue is exploited, the NFSv4 server and possibly the entire system may become unresponsive. This may lead to a system hang on the NFSv4 server. 4. Workaround If the hsfs(7FS) file system is shared, the NFS server system can be configured not to use NFSv4 by setting "NFS_SERVER_VERSMAX=3" in "/etc/default/nfs". For additional information, please refer to the nfs(4) documentation. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 10 with patch 139462-02 or later * OpenSolaris based upon builds snv_111 or later x86 Platform * Solaris 10 with patch 139463-02 or later * OpenSolaris based upon builds snv_111 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 2000-2009 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 iD8DBQFJubcUNVH5XJJInbgRAtNEAJ0WeIqVTDbPeQYBfUdR1PZ074QnBgCeOv2l eFRKK80kZMzFF0/8aaHwyoU= =T5Tp -----END PGP SIGNATURE-----