Bulletin Number: 00200

Title: arp

Cross-Ref: Bugtraq ID 2193

Create Date: January 12, 2001

Date: January 12, 2001

________________________________________________________________________________

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1.  Bulletins Topics

    Sun announces the release of patches for Solaris(tm) 7, 2.6, 2.5.1,
    2.5, and 2.4 (SunOS(tm) 5.7, 5.6, 5.5.1, 5.5, and 5.4) which relate 
    to a setgid vulnerability in arp.

2.  Who is Affected
	
    Versions of arp in Solaris prior to Solaris 8

	
    	Vulnerable:     	Solaris 7, 7_x86, 2.6, 2.6_x86, 2.5.1,
                                2.5.1_x86, 2.5, 2.5_x86, 2.4, 2.4_x86
    	Not vulnerable:		Solaris 8.	

3.  Understanding the Vulnerability

    The arp program displays and modifies the Internet-to-Ethernet address 
    translation tables used by the address resolution protocol (arp).  Prior
    to Solaris 8, arp was setgid making it susceptible to certain setgid
    attacks.
        
    A malicious user could overflow the stack and execute shellcode which  
    could allow unauthorized root access.  

4.  List of Patches

    The following patches are available in relation to the above problem.
    
    OS Version		Patch ID        
    __________		_________
    SunOS 5.7		109709-01  
    SunOS 5.7_x86    	109710-01
    SunOS 5.6		109719-01
    SunOS 5.6_x86	109720-01
    SunOS 5.5.1		109721-01
    SunOS 5.5.1_x86	109722-01
    SunOS 5.5		109707-01
    SunOS 5.5_x86	109708-01
    SunOS 5.4 	        109723-01
    SunOS 5.4_x86	109724-01
________________________________________________________________________________
Sun acknowledges, with thanks, Dave Ahmed of Security-Focus.com and Pablo Sor
from the AFIP Computer Security Department for their assistance with this
matter.
http://www.securityfocus.com/bid/2193
________________________________________________________________________________
APPENDICES

A.  Patches listed in this bulletin are available to all Sun customers at:
    
    http://sunsolve.sun.com/securitypatch
    
B.  Checksums for the patches listed in this bulletin are available at:

    ftp://sunsolve.sun.com/pub/patches/CHECKSUMS

C.  Sun security bulletins are available at:

    http://sunsolve.sun.com/security
	
D.  Sun Security Coordination Team's PGP key is available at:

    http://sunsolve.sun.com/pgpkey.txt
		    	    	    
E.  To report or inquire about a security problem with Sun software, contact 
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        - Your local Sun answer centers
        - Your representative computer security response team, such as CERT 
        - Sun Security Coordination Team. Send email to:
	 
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Copyright 2001 Sun Microsystems, Inc. All rights reserved. Sun, 
Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks 
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