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             AUSCERT External Security Bulletin Redistribution

               ESB-2004.0565 -- Sun Alert Notification 57614
      The in.named(1M) Process May Die Upon Receiving Dynamic Updates
                             13 September 2004

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

Product:                in.named
Publisher:              Sun Microsystems
Operating System:       Solaris 8
Platform:               IA-32
                        SPARC
Impact:                 Denial of Service
Access:                 Remote/Unauthenticated

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   DOCUMENT ID: 57614
   SYNOPSIS: The in.named(1M) Process May Die Upon Receiving Dynamic
   Updates
   DETAIL DESCRIPTION:
   
Sun(sm) Alert Notification

     * Sun Alert ID: 57614
     * Synopsis: The in.named(1M) Process May Die Upon Receiving Dynamic
       Updates
     * Category: Security
     * Product: Solaris
     * BugIDs: 4879822
     * Avoidance: Workaround, Patch
     * State: Resolved
     * Date Released: 03-Sep-2004
     * Date Closed: 03-Sep-2004
     * Date Modified:
       
1. Impact

   A remote privileged user may be able to create a denial of the Domain
   Name System (DNS) service by killing the in.named(1M) daemon. As a
   result, applications, systems and devices relying on DNS may fail.
   
2. Contributing Factors

   This issue can occur in the following releases:
   
   SPARC Platform
     * Solaris 8 without patch 109326-16
       
   x86 Platform
     * Solaris 8 without patch 109327-16
       
   Note: Solaris 7 and Solaris 9 are not affected by this issue.
   
   The described issue only occurs on systems configured as an Internet
   DNS server. A system is configured to be a DNS server if the
   configuration file "/etc/named.conf" (named.conf(4)) exists.
   
3. Symptoms

   If the described issue occurs, the in.named(1M) process is no longer
   running. To determine if the in.named(1M) process is running, use the
   pgrep(1) command as shown:
    $ pgrep in.named || echo "in.named process NOT found!"                     
             

   Messages may be logged to syslog(3c) with a severity of "LOG_NOTICE"
   whose content starts with the following:
    "unapproved update from"                                          

   SOLUTION SUMMARY:
   
4. Relief/Workaround

   To work around the described issue, restart in.named(1M) using the
   following command as root user:
    # pgrep in.named || /usr/sbin/in.named                                     
           

   The following simple Bourne shell script will check and restart
   in.named(1M) as necessary:
    # while pgrep in.named || /usr/sbin/in.named; do sleep 10; done            
                                    

5. Resolution

   This issue is addressed in the following releases:
   
   SPARC Platform
     * Solaris 8 with patch 109326-16 or later
       
   x86 Platform
     * Solaris 8 with patch 109327-16 or later
       
   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.

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