-----BEGIN PGP SIGNED MESSAGE----- [ For Public Release ] __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SunOS, Solaris NIS+ Vulnerability July 30, 1997 22:00 GMT Number H-90 ______________________________________________________________________________ PROBLEM: A vulnerability has been identified in NIS+, a network-wide name service, that runs under Solaris. PLATFORM: Solaris 2.4 and 2.3 (SunOS 5.4 and 5.3) which use NIS+ DAMAGE: Local users may gain root privileges. SOLUTION: Apply patches listed below. ______________________________________________________________________________ VULNERABILITY Sun strongly recommends that you install the patches listed in ASSESSMENT: section 4 immediately. ______________________________________________________________________________ [ Start Sun Microsystems Advisory ] ______________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00148 Date: July 30 Title: Vulnerability in NIS+ ______________________________________________________________________________ Permission is granted for the redistribution of this Bulletin, so long as the Bulletin is not edited and is attributed to Sun Microsystems. Portions may also be excerpted for re-use in other security advisories so long as proper attribution is included. Any other use of this information without the express written consent of Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all liability for any misuse of this information by any third party. ______________________________________________________________________________ 1. Bulletins Topics Sun announces the release of patches for Solaris 2.4 and 2.3 (SunOS 5.4 and 5.3) which relate to a vulnerability in NIS+. Sun strongly recommends that you install the patches listed in section 4 immediately on systems running SunOS 5.4 and 5.3 which use NIS+. 2. Who is Affected Vulnerable: SunOS versions 5.4, 5.4_x86, and 5.3 which use NIS+. Not Vulnerable: SunOS 4.1.3_U1, 4.1.4, 5.5, 5.5_x86, 5.5.1, 5.5.1_x86, and the upcoming version of Solaris. 3. Understanding the Vulnerability NIS+ is a network-wide name service that runs under Solaris. It can be selected as the name service in /etc/nsswitch.conf. If NIS+ is selected, programs with setuid root permissions will link nss_nisplus.so.1 which is susceptible to a buffer overflow vulnerability. This vulnerability may allow non-privileged users to gain root privileges. 4. List of Patches The vulnerability in NIS+ is fixed by the following patches: OS version Patch ID __________ ________ SunOS 5.4 102277-03 SunOS 5.4_x86 102278-03 SunOS 5.3 101736-04 5. Checksum Table The checksum table below shows the BSD checksums (SunOS 5.x: /usr/ucb/sum), SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures for the above-mentioned patches that are available from: These checksums may not apply if you obtain patches from your answer centers. File Name BSD SVR4 MD5 _______________ ________ _________ ________________________________ 102277-03.tar.Z 10681 76 2019 152 4585727103680C70301D2F7679C9EA6D 102278-03.tar.Z 52108 76 53872 151 5040EB6980280C729051927BFB5C8130 101736-04.tar.Z 27381 77 18741 153 0AC81583908220A4D92CF5C091D6212C ______________________________________________________________________________ Sun is a member of FIRST, the Forum of Incident Response and Security Teams. For more information about FIRST, visit the FIRST web site at "http://www.first.org/". ______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers via World Wide Web at: Customers with Sun support contracts can also obtain patches from local Sun answer centers and SunSITEs worldwide. B. Sun security bulletins are available via World Wide Web at: C. 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To subscribe, supply the following in the subject line (not body): subscribe cws your-email-address Note that your-email-address should be substituted by your email address. unsubscribe Sender is removed from the CWS mailing list. ______________________________________________________________________________ [ End Sun Microsystems Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. 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. 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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. 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