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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0230 -- [Solaris] Security Vulnerability in the Solaris NFS Server Security Modes (nfssec(5)) may Lead to Unauthorized Access to Shared Resources 13 March 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Solaris NFS Server Security Modes (nfssec(5)) Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact: Inappropriate Access Access: Remote/Unauthenticated CVE Names: CVE-2009-0872 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-253588-1 Revision History: March 13 2009: Added CVE March 11 2009: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 253588 : Security Vulnerability in the Solaris NFS Server Security Modes (nfssec(5)) may Lead to Unauthorized Access to Shared Resources Bug ID: 6359212 Product Solaris 10 Operating System OpenSolaris Date of Resolved Release: 09-Mar-2009 SA Document Body Security vulnerability in the Solaris NFS server security modes (nfssec(5)) may lead to unauthorized access to shared resources: 1. Impact A security vulnerability in the Solaris NFS server may lead to unauthorized access to file systems shared via NFS if those resources are shared using a combination of "none" (AUTH_NONE) and "sys" (AUTH_SYS) (see nfssec(5)) security modes. 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: Only NFS servers which export shares with AUTH_NONE used in combination with the security mode AUTH_SYS are impacted by this issue. To determine if a system is configured to run as an NFS server (see smf(5)), the following command can be used: $ svcs nfs/server STATE STIME FMRI online 14:30:59 svc:/network/nfs/server:default To determine if a system exports shares that have AUTH_NONE used in combination with AUTH_SYS, run the following command on the server (see share_nfs(1M)): $ share /var/tmp sec=sys,rw=authorized-host,sec=none,ro If the output of the share(1M) command includes NFS shares with "sec=sys" and "sec=none", then the NFS server shares resources with AUTH_NONE used in combination with the security mode AUTH_SYS. Note 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 There are no predictable symptoms that would indicate the described vulnerability has been exploited to gain unauthorized access to exported data. 4. Workaround To avoid this issue until patches can be applied, do not export NFS shares on the NFS server using AUTH_NONE and AUTH_SYS in combination. 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 iD8DBQFJubemNVH5XJJInbgRArxJAJ9OO7xlBbPhWSRqGiQG5+MHL8eCSwCeL59x OIfzQhkmPZxtxqmIq7TfkfM= =EsrT -----END PGP SIGNATURE-----