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             AUSCERT External Security Bulletin Redistribution

     ESB-2004.0635 -- Sun(sm) Alert Notification - Sun Alert ID: 57646
Security Vulnerabilities in Common Unix Printing System (CUPS) May Allow a
            Remote Unprivileged User to Execute Arbitrary Code
                              11 October 2004

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

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

Product:                CUPS
Publisher:              Sun Microsystems
Operating System:       Solaris
                        UNIX variants
Impact:                 Execute Arbitrary Code/Commands
Access:                 Remote/Unauthenticated
CVE Names:              CAN-2004-0801 CAN-2004-0558

Ref:                    ESB-2004.0577
                        ESB-2004.0576
Original Bulletin URL:  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57646-1


Sun(sm) Alert Notification

     * Sun Alert ID: 57646
     * Synopsis: Security Vulnerabilities in Common Unix Printing System
       (CUPS) May Allow a Remote Unprivileged User to Execute Arbitrary
       Code
     * Category: Security
     * Product: Sun Java Desktop System (JDS)
     * BugIDs: 5102516
     * Avoidance: Patch
     * State: Resolved
     * Date Released:
     * Date Closed:
     * Date Modified:

1. Impact

   Due to improper command line and environment variable validation, a
   remote or local unprivileged user may be able to execute arbitrary
   commands with the privileges of the CUPS daemon (cupsd(8)), which is
   typically the unprivileged "lp" user. Furthermore, a remote Denial of
   Service (DoS) condition within CUPS may allow remote unprivileged
   users to cause the CUPS server to become unresponsive.

   Note: The Common Unix Printing System (CUPS) is a cross-platform
   printing solution for all UNIX environments. It is based on the
   Internet Printing Protocol (IPP) and provides complete printing
   services to most PostScript and raster printers.

   These issues are described in the following documents:

     * SUSE-SA:2004:031 at
       [2]http://www.suse.com/de/security/2004_31_cups.html
     * CAN-2004-0801 at
       [3]http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0801
     * CAN-2004-0558 at
       [4]http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0558

2. Contributing Factors

   These issues can occur in the following releases:

   Linux

     * Sun Java Desktop System (JDS) 2003 without the updated RPMs
       (patch-9321)
     * Sun Java Desktop System (JDS) Release 2 without the updated RPMs
       (patch-9321)

   Note: JDS for Solaris is not impacted by these issues.

   These issues only occur with CUPS versions cups-libs-1.1.15-150 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 CUPS, the following command can be run:

    % rpm -qf /usr/lib/libcups.so.2
    cups-libs-1.1.15-1

3. Symptoms

   There are no reliable symptoms that would show the buffer overflow
   issue described has been exploited. The CUPS daemon cupsd(8) will
   become unresponsive when the Denial of Service (DoS) attack has been
   exploited.

   Solution Summary [5]Top

4. Relief/Workaround

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

5. Resolution

   These issues are addressed in the following releases:

   Linux

     * Sun Java Desktop System (JDS) 2003 with the updated RPMs
       (patch-9321)
     * Sun Java Desktop System (JDS) Release 2 with the updated RPMs
       (patch-9321)

   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=1-26-57646-1#top
   2. http://www.suse.com/de/security/2004_31_cups.html
   3. http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0801
   4. http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0558
   5. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57646-1#top
   6. http://wwws.sun.com/software/javadesktopsystem/faq.html#5q5
   7. http://wwws.sun.com/software/javadesktopsystem/faq.html#5q7

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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