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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0800 -- [Solaris] A Security Vulnerability in Solaris 10 involving the sendfilev() system call could result in Denial of Service (DoS) due to System Panic 15 August 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Solaris 10 Apache 2.2.x Publisher: Sun Microsystems Operating System: Solaris Impact: Denial of Service Access: Existing Account CVE Names: CVE-2008-3666 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-239186-1 Revision History: August 15 2008: Added CVE August 13 2008: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 239186 : A Security Vulnerability in Solaris 10 involving the sendfilev() system call could result in Denial of Service (DoS) due to System Panic Bug ID: 6675943 Date of Resolved Release: 06-Aug-2008 Product Solaris 10 Operating System OpenSolaris SA Document Body A Security Vulnerability in Solaris 10 involving the sendfilev() system call could result in Denial of Service (DoS) due to System Panic 1. Impact A security vulnerability in Solaris 10 related to the sendfilev() system call may allow a user who has the ability to create pages that are hosted on a Solaris 10 system using Apache 2.2.x, to create a carefully crafted web page which could cause a system panic resulting in a Denial of Service (DoS) condition. In addition, it may be possible for a local unprivileged user to be able to panic the system with a specially crafted program which calls the sendfile() system call (using either the sendfilev(3EXT) library routine or else directly). 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 10 without patch 137111-04 * OpenSolaris based upon builds snv_01 through snv_95 x86 Platform * Solaris 10 without patch 137112-04 * OpenSolaris based upon builds snv_01 through snv_95 Note: Solaris 8 and 9 are not impacted by this issue. Note: 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 -a SunOS phys-node-1 5.11 snv_86 i86pc i386 i86pc Note: The issue may be triggered by Apache 2.x web servers when compiled without certain compiler switches. The version of Apache 2.x shipped with Solaris will NOT trigger this vulnerability. 3. Symptoms The system panics when kmem_flags are not set with a data fault, or alignment error (Sparc) or a General Protection Fault (x86/x64) from a random thread dealing with Streams dblk_t data types. On a system with kmem_flags set to audit and redzone checking, (kmem_flags = 0x7 may be used), the system panics when kernel memory corruption is detected. 4. Workaround There is no workaround for this issue, unless the issue is triggered by Apache 2.x. If the issue is triggered by Apache 2.x, the following is recommended: Disable the use of sendfilev() in Apache by locating all the 'httpd.conf' files for all the Apache servers on the system and adding the following line: EnableSendFile off then stop and restart all Apache instances. 5. Resolution This issue is addressed in the following releases: SPARC Platform: * Solaris 10 with patch 137111-04 or later * OpenSolaris based upon builds snv_96 or later x86 Platform: * Solaris 10 with patch 137112-04 or later * OpenSolaris based upon builds snv_96 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 iQCVAwUBSKUAJCh9+71yA2DNAQL+FwP+IHTHGCjUFMs8u0lVbGa7s5Ol+zFWas9H WtANk8PCGbz4N1c9rK2UI/AyYL2YUMNtVOkk7SSzGPObCnP/kOYYdeFSzLYR12hX D+APuw7aXruNqPKklugbEltEziRa6pQRHVQeDEuJZjFaQcVWlB//jxi3MO8bvZ6R 1rrl3loXnUg= =x+JL -----END PGP SIGNATURE-----