__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Center ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Sun rpc.yppasswdd Security Vulnerability [Sun Microsystems Security Bulletin #00209] October 23, 2001 18:00 GMT Number M-008 ______________________________________________________________________________ PROBLEM: A vulnerability exists in the rpc.yppasswdd daemon. This daemon can be exploited through a buffer overflow. PLATFORM: The following Sun operating systems are affected: 5.8 5.8_x86 5.7 5.7_x86 5.6 5.6_x86 DAMAGE: A remote or local user can obtain root access on the system. SOLUTION: Apply the patches as specified by Sun. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. This can lead to system compromise and the ASSESSMENT: vulnerability has been publicly reported. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/m-008.shtml ______________________________________________________________________________ [***** Start Sun Microsystems Security Bulletin #00209 *****] ________________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00209 Date: October 22, 2001 Cross-Ref: CERT Vulnerability Note VU#327281 Title: rpc.yppasswdd ________________________________________________________________________________ The information contained in this Security Bulletin is provided "AS IS." Sun makes no warranties of any kind whatsoever with respect to the information contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW. IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. If any of the above provisions are held to be in violation of applicable law, void, or unenforceable in any jurisdiction, then such provisions are waived to the extent necessary for this disclaimer to be otherwise enforceable in such jurisdiction. ________________________________________________________________________________ 1. Bulletins Topics Sun announces the release of patches for Solaris(tm) 8, 7, and 2.6 (SunOS(tm) 5.8, 5.7, and 5.6) which relate to a buffer overflow vulnerability in rpc.yppasswdd. Sun recommends that you install the patches listed in section 4 immediately on NIS master servers running SunOS 5.8, 5.7, and 5.6. 2. Who is Affected Vulnerable: SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6, and 5.6_x86 Not vulnerable: SunOS 5.5.1, 5.5.1_x86 and earlier SunOS versions 3. Understanding the Vulnerability The rpc.yppasswdd daemon runs on all master server machines that are set up to use NIS. The rpc.yppasswdd daemon handles password change requests from yppasswd(1). A buffer overflow vulnerability has been discovered in rpc.yppasswd which may be exploited by a local or a remote attacker to gain root access on the NIS master server system. CERT Vulnerability Note VU#327281 is available from: http://www.kb.cert.org/vuls/id/327281 4. List of Patches The following patches are available in relation to the above problems. OS Version Patch ID __________ _________ SunOS 5.8 111596-02 SunOS 5.8_x86 111597-02 SunOS 5.7 111590-02 SunOS 5.7_x86 111591-02 SunOS 5.6 106303-03 SunOS 5.6_x86 106304-03 _______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers at: http://sunsolve.sun.com/securitypatch B. Checksums for the patches listed in this bulletin are available at: ftp://sunsolve.sun.com/pub/patches/CHECKSUMS C. Sun security bulletins are available at: http://sunsolve.sun.com/security D. Sun Security Coordination Team's PGP key is available at: http://sunsolve.sun.com/pgpkey.txt E. To report or inquire about a security problem with Sun software, contact one or more of the following: - Your local Sun answer centers - Your representative computer security response team, such as CERT - Sun Security Coordination Team. Send email to: security-alert@sun.com F. To receive information or subscribe to our CWS (Customer Warning System) mailing list, send email to: security-alert@sun.com with a subject line (not body) containing one of the following commands: Command Information Returned/Action Taken _______ _________________________________ help An explanation of how to get information key Sun Security Coordination Team's PGP key list A list of current security topics query [topic] The email is treated as an inquiry and is forwarded to the Security Coordination Team report [topic] The email is treated as a security report and is forwarded to the Security Coordination Team. 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This Security Bulletin may be reproduced and distributed, provided that this Security Bulletin is not modified in any way and is attributed to Sun Microsystems, Inc. and provided that such reproduction and distribution is performed for non-commercial purposes. [***** End Sun Microsystems Security Bulletin #00209 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Center, 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. 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