From ciac@rumpole.llnl.gov Sat Feb 20 04:59:56 1999 From: CIAC Mail User To: ciac-bulletin@rumpole.llnl.gov Date: Fri, 19 Feb 1999 15:13:10 -0800 (PST) Subject: CIAC Bulletin J-031: Debian Linux "Super" package Buffer Overflow [ For Public Release ] -----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Debian Linux "Super" package Buffer Overflow February 16, 1999 19:00 GMT Number J-031 ______________________________________________________________________________ PROBLEM: Internet Security Systems (ISS) X-Force has discovered a vulnerability in the system administration utility, "Super". PLATFORM: All versions of Super distributed with Debian Linux. Can be installed and configured for many Unix variants. DAMAGE: If exploited, this vulnerability could lead to a root compromise. SOLUTION: Until Super version 3.11.7 is available, apply the fix listed below. ______________________________________________________________________________ VULNERABILITY Risk is high since this vulnerability could lead to a root ASSESSMENT: compromise. ______________________________________________________________________________ [ Start ISS Security Advisory ] ISS Security Advisory February 15, 1999 Buffer Overflow in "Super" package in Debian Linux Synopsis: Internet Security Systems (ISS) X-Force has discovered a vulnerability in the system administration utility, "Super". Super is used by administrators to allow certain users to execute commands with root privileges. The vulnerability is distributed with Debian Linux. It may allow local attackers to compromise root access. Super is a GNU copylefted package that is distributed with recent Debian Linux distributions, but it can be installed and configured for many Unix variants. Affected versions: ISS X-Force has determined that version 3.9.6 through version 3.11.6 are vulnerable. All versions of Super distributed with Debian Linux are vulnerable. Execute the following command to determine version information: # /usr/bin/super -V Fix Information: The main distribution point for the Super package: ftp.ucolick.org:/pub/users/will/ Mirror: ftp.onshore.com:/pub/mirror/software/super super-3.11.7.tar.gz full source code for 3.11.7 super-3.11.6.patch1 patches overflow in 3.11.6 super-3.11.6-3.11.7 patch to change 3.11.6 to 3.11.7 Please refer to these locations for fixes which will be included in Super version 3.11.7. Description: Super is a utility that allows authorized users to execute commands with root privileges. It is intended to be an alternate to setuid scripts, which are inherently dangerous. A buffer overflow exists in Super that may allow attackers to take advantage of its setuid configuration to gain root access. Recommended Action: Version 3.11.7 should be installed as soon as it is available. Administrators should take care to disable setuid root utilities that are not used by regular users. To disable Super permanently, execute the following command as root to disable the setuid bit: # chmod 755 /usr/bin/super __________ Copyright (c) 1999 by Internet Security Systems, Inc. Permission is hereby granted for the redistribution of this alert electronically. It is not to be edited in any way without express consent of X-Force. If you wish to reprint the whole or any part of this alert in any other medium excluding electronic medium, please e-mail xforce@iss.net for permission. Disclaimer: The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. X-Force PGP Key available at: http://www.iss.net/xforce/sensitive.html, as well as on MIT's PGP key server and PGP.com's key server. X-Force Vulnerability and Threat Database: http://www.iss.net/xforce Please send suggestions, updates, and comments to: X-Force of Internet Security Systems, Inc. [ End ISS Security Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Internet Security Systems 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. 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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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