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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0066 -- [Solaris] A Security Vulnerability in the libxml2 Library May Lead to Denial of Service (DoS) 19 January 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libxml2 Publisher: Sun Microsystems Operating System: Solaris OpenSolaris Impact: Denial of Service Access: Remote/Unauthenticated CVE Names: CVE-2008-3529 Ref: ESB-2008.0869 Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-247346-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 247346 : A Security Vulnerability in the libxml2 Library May Lead to Denial of Service (DoS) Bug ID: 6755235 Product Solaris 9 Operating System Solaris 10 Operating System Date of Resolved Release: 15-Jan-2009 A Security Vulnerability in the libxml2 Library May Lead to Denial of Service (DoS) 1. Impact A security vulnerability in the libxml2 library (see libxml2(3)) bundled with Solaris 9 and Solaris 10 may allow a local or remote unprivileged user who provides a specially crafted XML file to cause a denial of service (DoS) to the application which is using the libxml2 library (or potentially to the system as a whole as the application may consume excessive resources). This vulnerability may impact applications making use of this library, and the precise impact will vary depending on the application. Additional information regarding this issue is available in the following document: CVE-2008-3529 at http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3529 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 9 without patch 114014-21 * Solaris 10 without patch 125731-03 * OpenSolaris based upon builds snv_01 through snv_100 x86 Platform * Solaris 9 without patch 114015-21 * Solaris 10 without patch 125732-03 * OpenSolaris based upon builds snv_01 through snv_100 Note: Solaris 8 does not bundle libxml2 and thus no applications supplied with Solaris 8 use libxml2. However, libxml2 version 2.4.12 is included on the Solaris 8 OS Software Supplement CD for use with SunVTS 5.1. The SunVTS 5.1 software doesn't generate XML which would trigger this vulnerability so no patches are required for libxml2 in Solaris 8. 3. Symptoms If this issue is exploited, the application which makes use of the libxml2 library to process the crafted XML file may be unresponsive, possibly consuming all available CPU or memory resources while looping. Commands such as prstat(1M) can be used to determine the utilization of system resources, as in the following example: $ prstat -s cpu [...] 4. Workaround There is no workaround for this issue. Please see the Resolution section below. 5. Resolution SPARC Platform * Solaris 9 with patch 114014-21 or later * Solaris 10 with patch 125731-03 or later * OpenSolaris based upon build snv_101 or later x86 Platform * Solaris 9 with patch 114015-21 or later * Solaris 10 with patch 125732-03 or later * OpenSolaris based upon build snv_101 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 iQCVAwUBSXO/qyh9+71yA2DNAQLSPQP/SXiJdPGt2eCXyxfAPIBz6WFY5jTmcBEU MV7MvE5t9Krcc5woIxKnyaRlNs4W6h313EhLB7rNz18LtpdpZDK1Nendh6ywjA6h CNpkX0PBDWK4ppxBxshqdKExRwEUJDA903AaE7xZKk/+eRR31KUxwC+KvVSXLHzr 2RJsMBjHYxg= =tjgX -----END PGP SIGNATURE-----