AusCERT - ESB-2003.0872 -- Sun Alert Notification -- Security Issue Involving the tcsh(1) ls-F builtin on Solaris 8

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ESB-2003.0872 -- Sun Alert Notification -- Security Issue Involving the tcsh(1) ls-F builtin on Solaris 8
Date: 24 December 2003

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                  ESB-2003.0872 -- Sun Alert Notification
      Security Issue Involving the tcsh(1) ls-F builtin on Solaris 8
                             24 December 2003

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                tcsh(1)
Publisher:              Sun Microsystems
Operating System:       Solaris 8
Platform:               IA-32
                        SPARC
Impact:                 Increased Privileges
                        Create Arbitrary Files
                        Delete Arbitrary Files
Access Required:        Existing Account

Comment: Original bulletin available at:

         http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F57455

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   DOCUMENT ID: 57455
   SYNOPSIS: Security Issue Involving the tcsh(1) ls-F builtin on Solaris 8
   DETAIL DESCRIPTION:
   
Sun(sm) Alert Notification

     * Sun Alert ID: 57455
     * Synopsis: Security Issue Involving the tcsh(1) ls-F builtin on
       Solaris 8
     * Category: Security
     * Product: Solaris
     * BugIDs: 4599390
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 22-Dec-2003
     * Date Closed: 22-Dec-2003
     * Date Modified:
       
1. Impact

   A local unprivileged user may be able to create or remove files or
   gain privileges of another user, possibly root, if the tcsh(1) builtin
   command ls-F is used. The files created or removed and privileges
   possibly gained would depend on the privileges and user-ID of the
   process that executed the tcsh(1) ls-F builtin command.
   
2. Contributing Factors

   This issue can occur in the following releases:
   
   SPARC Platform
     * Solaris 8 without patch 110943-02
       
   x86 Platform
     * Solaris 8 without patch 110944-02
       
   Note: Solaris 7 and Solaris 9 are not affected by this issue.
   
3. Symptoms

   There are no reliable symptoms that would show the described issue has
   been exploited to gain unauthorized elevated privileges to a host.
   SOLUTION SUMMARY:
   
4. Relief/Workaround

   To prevent this issue from occurring, do not utilize the tcsh(1) ls-F
   builtin directly and avoid any tcsh(1) functionality which uses the
   ls-F builtin such as filename completion (done by typing "^D").
   
5. Resolution

   This issue is addressed in the following releases:
   
   SPARC Platform
     * Solaris 8 with patch 110943-02 or later
       
   x86 Platform
     * Solaris 8 with patch 110944-02 or later
       
   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.

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