Operating System:

[Solaris]

Published:

19 January 2009

Protect yourself against future threats.

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             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

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        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

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   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

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