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UNIRAS Brief - 572/04 - Sun Alert Notification 57655



 
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   UNIRAS (UK Govt CERT) Briefing Notice - 572/04 dated 18.10.04  Time: 10:15  
  UNIRAS is part of NISCC (National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Title
=====

Sun Alert Notification 57655 - The FTP Daemon of Heimdal is Vulnerable to Multiple
Signal Handler Race Conditions



Detail
====== 

The FTP daemon of Heimdal is vulnerable to multiple signal handler race conditions
that may allow an unprivileged remote or local user to execute aribitrary code with the
privileges (typically root) of the FTP server process.
    


               ESB-2004.0658 -- Sun Alert Notification 57655
        The FTP Daemon of Heimdal is Vulnerable to Multiple Signal
                          Handler Race Conditions
                              18 October 2004


Product:                Heimdal FTP Daemon
Publisher:              Sun Microsystems
Operating System:       Linux variants
                        UNIX variants
Impact:                 Root Compromise
Access:                 Remote/Unauthenticated
CVE Names:              CAN-2004-0794

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Sun(sm) Alert Notification

     * Sun Alert ID: 57655
     * Synopsis: The FTP Daemon of Heimdal is Vulnerable to Multiple
       Signal Handler Race Conditions
     * Category: Security
     * Product: Sun Java Desktop System (JDS)
     * BugIDs: 6175051
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 15-Oct-2004
     * Date Closed: 15-Oct-2004
     * Date Modified:

1. Impact

   The FTP daemon of Heimdal is vulnerable to multiple signal handler
   race conditions that may allow an unprivileged remote or local user to
   execute aribitrary code with the privileges (typically root) of the
   FTP server process .

   Note: Heimdal (heimdal.info) is a free implementation of Kerberos 5.

   This issue is described in the following documents:

     * [2]http://www.pdc.kth.se/heimdal/advisory/2004-09-13/
     * [3]http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0794
     * [4]http://bugs.gentoo.org/show_bug.cgi?id=61412

2. Contributing Factors

   This issue can occur in the following releases:

   Linux

     * Sun Java Desktop System (JDS) 2003 without the updated RPMs
       (patch-9369)
     * Sun Java Desktop System (JDS) Release 2 without the updated RPMs
       (patch-9369)

   Note: JDS for Solaris is not impacted by this issue.

   This issue only occurs with Heimdal FTP versions heimdal-0.4e-396 or
   earlier.

   To determine the release of JDS for Linux installed on a system, the
   following command can be run:

    % cat /etc/sun-release
    Sun Java Desktop System, Release 2 -build 10b (GA)
    Assembled 30 March 2004


   To determine the version of Heimdal, the following command can be run:

    % rpm -qf /usr/lib/heimdal/sbin/ftpd
    heimdal-0.4e-396


3. Symptoms

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

   Solution Summary [5]Top

4. Relief/Workaround

   There is no workaround. Please see the "Resolution" section below.

5. Resolution

   This issue is addressed in the following releases:

   Linux

     * Sun Java Desktop System (JDS) 2003 with the updated RPMs
       (patch-9369)
     * Sun Java Desktop System (JDS) Release 2 with the updated RPMs
       (patch-9369)

   To download and install the updated RPMs from the update servers
   select the following from the launch bar:

    Launch >> Applications >> System Tools >> Online Update


   For more information on obtaining updates see:

     * [6]http://wwws.sun.com/software/javadesktopsystem/faq.html#5q5
     * [7]http://wwws.sun.com/software/javadesktopsystem/faq.html#5q7

   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 2000-2004 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved.

References

   1. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57655-1#top
   2. http://www.pdc.kth.se/heimdal/advisory/2004-09-13/
   3. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0794
   4. http://bugs.gentoo.org/show_bug.cgi?id=61412
   5. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57655-1#top
   6. http://wwws.sun.com/software/javadesktopsystem/faq.html#5q5
   7. http://wwws.sun.com/software/javadesktopsystem/faq.html#5q7

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UNIRAS wishes to acknowledge the contributions of Sun Microsystems for the information 
contained in this Briefing. 
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<End of UNIRAS Briefing>

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