__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Sun's XSun Program Buffer Overflow Vulnerability [Sun Alert ID: 55420] June 20, 2003 19:00 GMT Number N-108 ______________________________________________________________________________ PROBLEM: The Xsun program is the Graphical User Interface subsystem installed by default on all Sun Solaris systems. A buffer overflow vulnerability in the dbm_open(ndbm(3C) and dbm(3UCB)) and dbminit(3UCB) database functions has been found. PLATFORM: Solaris v2.6, 7, 8, and 9 DAMAGE: A local unprivileged user may be able to gain unauthorized root privileges. SOLUTION: Apply appropriate vendor patches. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A local user could execute arbitrary code ASSESSMENT: with root privileges. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/n-108.shtml ORIGINAL BULLETIN: http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc= fsalert%2F55420&zone_32=category%3Asecurity ______________________________________________________________________________ [***** Start Sun Alert ID: 55420 *****] Sun(sm) Alert Notification Sun Alert ID: 55420 Synopsis: A Buffer Overflow Vulnerability in the dbm_open(ndbm(3C) and dbm(3UCB)) and dbminit(3UCB) Database Functions May Allow Unauthorized Root Privileges Category: Security Product: Solaris BugIDs: 4661997, 4668699 Avoidance: Patch State: Resolved Date Released: 19-Jun-2003 Date Closed: 19-Jun-2003 Date Modified: 1. Impact A local unprivileged user may be able to gain unauthorized root privileges due to a buffer overflow vulnerability in the database function routines dbm_open(3C) and dbminit(3UCB). The dbm_open(3C) database function is present in the C library libc(3LIB) and is used in the Solaris privileged program Xsun(1). 2. Contributing Factors This issue can occur in the following releases: SPARC Platform Solaris 2.6 without patches 105210-47, 105377-06 and 105401-43 Solaris 7 without patches 106541-22, 106942-26 and 106949-03 Solaris 8 without patches 108827-24, 108993-16 and 109152-02 Solaris 9 without patches 112874-01, 112922-02, 113319-10, 114569-02 and 114571-01 x86 Platform Solaris 2.6 without patches 105211-49 and 105402-43 Solaris 7 without patches 106542-22 and 106943-26 Solaris 8 without patches 108828-25, 108994-16 and 114617-01 Solaris 9 without patches 113719-03, 114570-01 and 114715-01 3. Symptoms There are no predictable symptoms that would show the described issue has been exploited to gain unauthorized root access to a system. Solution Summary 4. Relief/Workaround There is no workaround. Please see the "Resolution" section below. 5. Resolution This issue is addressed in the following releases: SPARC Platform Solaris 2.6 with patches 105210-47, 105377-06 and 105401-43 or later for each listed patch Solaris 7 with patches 106541-22, 106942-26 and 106949-03 or later for each listed patch Solaris 8 with patches 108827-24, 108993-16 and 109152-02 or later for each listed patch Solaris 9 with patches 112874-01, 112922-02, 113319-10, 114569-02 and 114571-01 or later for each listed patch x86 Platform Solaris 2.6 with patches 105211-49 and 105402-43 or later for each listed patch Solaris 7 with patches 106542-22 and 106943-26 or later for each listed patch Solaris 8 with patches 108828-25, 108994-16 and 114617-01 or later for each listed patch Solaris 9 with patches 113719-03, 114570-01 and 114715-01 or later for each listed patch 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 2000-2003 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved. [***** End Sun Alert ID: 55420 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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