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             AUSCERT External Security Bulletin Redistribution

                        ESB-2008.1152 -- [Solaris]
     A Security Vulnerability in the Solaris Name Service Cache Daemon
           (nscd(1M)) May Allow Unauthorized Access to Data and
                         Escalation of Privileges
                             24 December 2008

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

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

Product:              nscd
Publisher:            Sun Microsystems
Operating System:     Solaris
                      OpenSolaris
Impact:               Increased Privileges
                      Access Privileged Data
Access:               Existing Account
CVE Names:            CVE-2008-5699

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-242006-1

Revision History:     December 24 2008: Added CVE
                      December 22 2008: Initial Release

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   Solution Type: Sun Alert
   Solution  242006 :   A Security Vulnerability in the Solaris Name
   Service Cache Daemon (nscd(1M)) May Allow Unauthorized Access to Data
   and Escalation of Privileges          
   Bug ID: 6740382

   Product
   Solaris 10 Operating System
   OpenSolaris

   Date of Resolved Release: 18-Dec-2008

   
   A Security Vulnerability in the Solaris Name Service Cache Daemon 
   (nscd(1M)) May Allow Unauthorized Access to Data and Escalation of
   Privileges

   1. Impact

   A security vulnerability in the Solaris name service cache daemon
   (nscd(1M)) may, under certain conditions, allow local unprivileged
   users to gain access to unauthorized information and gain elevated
   privileges.

   Sun acknowledges with thanks, Mike Gerdts for bringing this issue to
   our attention.

   2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform:
     * Solaris 10 Update 4 (8/07) without patch 138263-03
     * OpenSolaris based upon builds snv_50 through snv_104

   x86 Platform:
     * Solaris 10 Update 4 (8/07) without patch 138264-03
     * OpenSolaris based upon builds snv_50 through snv_104

   Notes:

   1. Solaris 8, Solaris 9 and Solaris 10 releases prior to Solaris 10
   Update 4 (8/07) are not impacted by this issue.

   2. OpenSolaris distributions may include additional bug fixes above
   and beyond the build from which it was derived. The base build can be
   derived as follows:

   $ uname -a
   SunOS  phys-node-1 5.11 snv_86 i86pc i386 i86pc

   3. This issue occurs only when nscd(1M) is running and the 'compat'
   mode is configured for the 'passwd' entry in nsswitch.conf(4).
   The following command may be run to check if the nscd(1M) process is
   running:

   $ svcs svc:/system/name-service-cache
   STATE          STIME    FMRI
   online         Aug_05   svc:/system/name-service-cache:default

   "online" indicates nscd is running.

   STATE          STIME    FMRI
   disabled       12:34:55 svc:/system/name-service-cache:default

   "disabled" indicates nscd is not running.

   The following command may be run to check if the 'compat' mode has
   been configured for the passwd(1) entry in nsswitch.conf(4):

   $ grep passwd: /etc/nsswitch.conf
   passwd: compat

   if the 'compat' mode has been configured for the passwd(1) entry.

   3. Symptoms

   There are no predictable symptoms to indicate this issue has been
   exploited to gain access to unauthorized data or gain elevated
   privileges.

   4. Workaround

   It is possible to work around the described issue with one of the
   following options:

   A) Disable the nscd(1M) daemon. This may be done by executing the
   following command as the 'root' user:

   # svcadm disable svc:/system/name-service-cache

   Disabling nscd(1M) may slow responses to name services requests on the
   affected host.

   B) Remove the 'compat' entry for 'passwd' in the file
   /etc/nsswitch.conf

   C) If the entry for 'passwd_compat' in /etc/nsswitch.conf is either
   'nis' or 'ldap', modify the entry for 'passwd' in the same file as
   follows:

   passwd:  nisplus compat

   If the entry for 'passwd_compat' in /etc/nsswitch.conf is 'nisplus',
   modify the entry for 'passwd' in the same file as follows:

   passwd:  yyyyyy compat

   where 'yyyyyy' is indeed the string 'yyyyyy' or any string that would
   not match a existing source.

   5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform:
     * Solaris 10 Update 4 (8/07) with patch 138263-03 or later
     * OpenSolaris based upon build snv_105 or later

   x86 Platform:
     * Solaris 10 Update 4 (8/07) with patch 138264-03 or later
     * OpenSolaris based upon build snv_105 or later

   For more information on Security Sun Alerts, see Technical
   Instruction ID 213557.

   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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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