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                                    CERT-Renater

                         Note d'Information No. 2007/VULN013
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DATE                      : 17/01/2007

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris running Third-party Applications
                                                  Using GSS-API.

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Sun(sm) Alert Notification

    This is a preliminary Sun Alert notification. Sun provides these
    notices in an effort to allow customers to implement mitigation
    strategies while these issues are being investigated. The information
    contained in these documents is likely to change as more is learned
    about the applicable issues. At the time of publication, workarounds
    and/or final resolutions are not available for the issues. Preliminary
    Sun Alert notifications will be updated as more information becomes
    available.
      * Sun Alert ID: 102772
      * Synopsis: Third-party Applications Using GSS-API May Be Vulnerable
        to Compromise
      * Category: Security
      * Product: Solaris 9 Operating System, Solaris 10 Operating System,
        Solaris 8 Operating System
      * BugIDs: 6510866
      * Avoidance: None
      * State: Preliminary
      * Date Released: 09-Jan-2007
      * Date Closed:
      * Date Modified: 10-Jan-2007

1. Impact

    Third-party applications which utilize GSS-API and thus link to the
    Generic Security Services library libgss(3LIB), may allow an
    unauthenticated user (local or remote depending on the application)
    the ability to execute arbitrary code with the privileges of the
    application.

    Note: Exploitation of this vulnerability is believed to be difficult.
    No exploit code is known to exist at this time.

    This issue is referenced in the following documents:

    MITKRB5-SA-2006-003 - MIT krb5 Security Advisory 2006-003 at
    http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2006-003-mechglue
    .txt

    CVE-2006-6144 at
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=2006-6144

    CERT VU#831452 at http://www.kb.cert.org/vuls/id/831452

2. Contributing Factors

    This issue can occur in the following releases:

    SPARC Platform
      * Solaris 8
      * Solaris 9
      * Solaris 10

    x86 Platform
      * Solaris 8
      * Solaris 9
      * Solaris 10

    Notes:
     1. This issue only affects applications which link against the
        Generic Security Services library libgss(3LIB).
     2. No applications shipped by Sun, including kadmind(1M), are
        affected by this issue.

    To determine if an application is linked against libgss(3LIB) the
    following command can be run:
     $ ldd application | grep libgss || echo "application not affected"

    If output similar to the following is seen:
     libgss.so.1 => /usr/lib/libgss.so.1

    then the application links to libgss(3LIB) and may be affected by this
    issue.

3. Symptoms

    There are no reliable symptoms that would indicate this issue has been
    exploited to execute arbitrary code with elevated privileges on a
    system.

4. Relief/Workaround

    There is no workaround for this issue.

5. Resolution

    A final resolution is pending completion.

Change History

    10-Jan-2007:
      * Updated Impact statement and URL

    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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