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===========================================================================
              AUSCERT External Security Bulletin Redistribution

                 ESB-98.192 -- Sun Security Bulletin #00180
                      Security Vulnerability with BIND
                         RE: CERT Advisory CA-98.05
                              18 December 1998

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

Sun Microsystems, Inc. has released the following bulletin concerning
vulnerabilities discoverd in SunOS and Solaris's implementations of BIND, 
one of which may allow a remote attacker to gain root access to a DNS name 
server, and another which may allow a Denial-of-Service attack to corrupt 
DNS record data or crash the DNS server.  SunOS and Solaris are not 
vulnerable to third vulnerability described in the CERT advisory: CERT 
Advisory CA-98.05.

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________________________________________________________________________________
 		   Sun Microsystems, Inc. Security Bulletin
 		
Bulletin Number:	#00180
Date: 			December 17, 1998
Cross-Ref:		CERT Advisory CA-98.05
Title:			BIND 
________________________________________________________________________________

The information contained in this Security Bulletin is provided "AS IS." 
Sun makes no warranties of any kind whatsoever with respect to the information 
contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS, 
REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR 
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 
HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW.

IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE, 
PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL 
OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY 
ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN 
THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF 
THE POSSIBILITY OF SUCH DAMAGES.

If any of the above provisions are held to be in violation of applicable law, 
void, or unenforceable in any jurisdiction, then such provisions are waived 
to the extent necessary for this disclaimer to be otherwise enforceable in 
such jurisdiction.
________________________________________________________________________________

1.  Background

    The Berkeley Internet Name Domain (BIND) is an implementation of the 
    Domain Name System (DNS).  
    
    CERT Advisory CA-98.05 describes three vulnerabilities in certain 
    versions of BIND. The first vulnerability, Inverse Query Buffer Overrun,
    can be exploited by a remote attacker to gain root access to a DNS 
    name server. The second vulnerability, Denial-of-Service Vulnerabilities,
    is concerned with buffer overflows that can be exploited to corrupt 
    DNS record data or crash the DNS server. SunOS(tm) and Solaris(tm) are 
    not vulnerable to third vulnerability described in the CERT advisory.
    For more information about the vulnerabilities, please see the 
    CERT advisory at:
    	
    	http://www.cert.org/ftp/cert_advisories/CA-98.05.bind_problems
    
    A vulnerability has also been discovered in SunOS and Solaris's 
    implementation of BIND with their use of temporary files. This vulnerability 
    can be exploited to overwrite arbitrary files.
    
2.  Affected Supported Versions
        
    Solaris(tm) versions:   2.6, 2.6_x86, 2.5.1, 2.5.1_x86, 2.5, 2.5_x86,
                            2.4, 2.4_x86 and 2.3 
                   
    SunOS(tm) versions:     4.1.4 and 4.1.3_U1
    
3.  Recommendations

    Sun recommends that you install the respective patches immediately on
    vulnerable systems including both DNS clients and servers.
    
    Operating System	Patch ID	
    _________________   _________    
    Solaris 2.6         105755-07		
    Solaris 2.6_x86     105756-07
    Solaris 2.5.1       103663-15
    Solaris 2.5.1_x86   103664-15
    Solaris 2.5         103667-11
    Solaris 2.5_x86     103668-11
    Solaris 2.4         102479-13
    Solaris 2.4_x86     102480-11
    Solaris 2.3         101359-10
    SunOS 4.1.4         106866-02
    SunOS 4.1.3_U1      106865-02
         
_______________________________________________________________________________
APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers via 
    World Wide Web at:
    
    	<URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html>

B.  Checksums for the patches listed in this bulletin are available via 
    World Wide Web at:

    	<URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html>

C.  Sun security bulletins are available via World Wide Web at:

	<URL:http://sunsolve.sun.com/sunsolve/secbulletins>
	
D.  Sun Security Coordination Team's PGP key is available via World Wide Web 
    at:

	<URL:http://sunsolve.sun.com/sunsolve/secbulletins/SunSCkey.txt>
		    	    	    
E.  To report or inquire about a security problem with Sun software, contact 
    one or more of the following:
  
        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT 
        - Sun Security Coordination Team. Send email to:
	 
     		security-alert@sun.com

F.  To receive information or subscribe to our CWS (Customer Warning System) 
    mailing list, send email to:
    
    		security-alert@sun.com
   
    with a subject line (not body) containing one of the following commands:

        Command         Information Returned/Action Taken
        _______         _________________________________

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                        following in the subject line (not body):
        		
                                send #138

        subscribe       Sender is added to our mailing list.  To subscribe, 
                        supply the following in the subject line (not body):

                            	subscribe cws your-email-address
			
                        Note that your-email-address should be substituted
                        by your email address.
			
        unsubscribe     Sender is removed from the CWS mailing list.
________________________________________________________________________________

Copyright 1998 Sun Microsystems, Inc. All rights reserved. Sun, 
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks 
of Sun Microsystems, Inc. in the United States and other countries. This 
Security Bulletin may be reproduced and distributed, provided that this 
Security Bulletin is not modified in any way and is attributed to 
Sun Microsystems, Inc. and provided that such reproduction and distribution 
is performed for non-commercial purposes.

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