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                                   CERT-Renater

                        Note d'Information No. 2005/VULN745
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DATE                      : 02/12/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris 7, Solaris 8, Solaris 9, Solaris 10.

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Sun(sm) Alert Notification
      * Sun Alert ID: 101800
      * Synopsis: Security Vulnerability in the Xsun(1) and Xprt(1)
        Commands
      * Category: Security
      * Product: Solaris 9 Operating System, Solaris 10 Operating System,
        Solaris 7 Operating System, Solaris 8 Operating System
      * BugIDs: 6265045
      * Avoidance: Patch, Workaround
      * State: Workaround
      * Date Released: 26-Sep-2005
      * Date Closed:
      * Date Modified: 30-Nov-2005

1. Impact

    A security vulnerability which affects the Xsun(1) and Xprt(1)
    commands may allow a a local unprivileged user the ability to execute
    arbitrary code with the privileges of either the Xsun(1) or Xprt(1)
    command.

    Sun acknowledges, with thanks, Eric Sheridan of Towson University for
    bringing this issue to our attention.

2. Contributing Factors

    This issue can occur in the following releases:

    SPARC Platform
      * Solaris 7 without patch 108376-46
      * Solaris 8 without patch 108652-93
      * Solaris 9 without patch 112785-50
      * Solaris 10 without patch 119059-05

    x86 Platform
      * Solaris 7
      * Solaris 8 without patch 108653-82
      * Solaris 9 without patch 112786-39
      * Solaris 10 without patch 119060-05

3. Symptoms

    There are no predictable symptoms that would indicate the described
    issue has been exploited.

4. Relief/Workaround

    To work around the described issue, remove the setuid(2) and/or
    setgid(2) bit from Xsun(1) and Xprt(1).

    Note: Performing the above procedure will disable the following:

    1. The ability to run Xsun on Solaris x86.

    2. Power management and Interactive Process Priority control on
    Solaris SPARC.

    3. Xsun(1) and Xprt(1) ability to open Unix domain sockets and named
    pipe transports in the protected "/tmp/.X11-*" directories.

    Note: These features will still be available if Xsun(1) is started via
    display managers such as dtlogin(1) or gdm(1), however, the system
    would still be vulnerable to this issue.

5. Resolution

    This issue is addressed in the following releases:

    SPARC Platform
      * Solaris 7 with patch 108376-46 or later
      * Solaris 8 with patch 108652-93 or later
      * Solaris 9 with patch 112785-50 or later
      * Solaris 10 with patch 119059-05 or later

    x86 Platform
      * Solaris 8 with patch 108653-82 or later
      * Solaris 9 with patch 112786-39 or later
      * Solaris 10 with patch 119060-05 or later

    A final resolution is pending completion.

Change History

    30-Nov-2005:
      * Updated Contributing Factors and Relief/Workaround sections

    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
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    OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
    This Sun Alert notification contains Sun proprietary and confidential
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    notification may only be used for the purposes contemplated by these
    agreements.

    Copyright 2000-2005 Sun Microsystems, Inc., 4150 Network Circle, Santa
    Clara, CA 95054 U.S.A. All rights reserved

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