From ciac@rumpole.llnl.gov Sat Feb 20 04:59:56 1999
From: CIAC Mail User <ciac@rumpole.llnl.gov>
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  ]
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             __________________________________________________________

                       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
<xforce@iss.net> 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.
______________________________________________________________________________


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