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             AUSCERT External Security Bulletin Redistribution

                  ESB-2007.0048 -- [UNIX/Linux][Solaris]
         Security Vulnerabilities in the tip(1) Command May Allow
           Execution of Arbitrary Code With Elevated Privileges
                              25 January 2007

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

Product:              tip 
Publisher:            Sun Microsystems
Operating System:     Solaris 10, 9 and 8
                      UNIX variants (UNIX, Linux, OSX)
Impact:               Root Compromise
Access:               Existing Account

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102773-1

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Sun(sm) Alert Notification
     * Sun Alert ID: 102773
     * Synopsis: Security Vulnerabilities in the tip(1) Command May Allow
       Execution of Arbitrary Code With Elevated Privileges
     * Category: Security
     * Product: Solaris 9 Operating System, Solaris 10 Operating System,
       Solaris 8 Operating System
     * BugIDs: 4706048
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 23-Jan-2007
     * Date Closed: 23-Jan-2007
     * Date Modified: 

1. Impact

   Security vulnerabilities in the tip(1) command may allow a local
   unprivileged user the ability to execute arbitrary code with the
   privileges of user uucp(uid 5).

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 8 without patch 111504-02
     * Solaris 9 without patch 123368-01
     * Solaris 10 without patch 124997-01

   x86 Platform
     * Solaris 8 without patch 111505-02
     * Solaris 9 without patch 123369-01
     * Solaris 10 without patch 124998-01

3. Symptoms

   There are no predictable symptoms that would indicate the described
   issue has been exploited to execute arbitrary commands with the
   privileges of the uucp(uid 5) user. 

4. Relief/Workaround

   To work around the described issue, remove the set-user-ID bit from
   the "tip" binary by issuing the following command:
    # chmod u-s /usr/bin/tip

   Note: removing the set-user-ID bit from the "tip" binary will prevent
   unprivileged users from using the "tip" command to access calling
   devices (like modems).

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 8 with patch 111504-02 or later
     * Solaris 9 with patch 123368-01 or later
     * Solaris 10 with patch 124997-01 or later

   x86 Platform
     * Solaris 8 with patch 111505-02 or later
     * Solaris 9 with patch 123369-01 or later
     * Solaris 10 with patch 124998-01 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 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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