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25 August 1997

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              AUSCERT External Security Bulletin Redistribution

                     ESB-97.109 -- Sun Security Bulletin #00152
			 Vulnerability in ifconfig ioctls
                              26 August 1997


Sun Microsystems, Inc. has released the following bulletin concerning a
vulnerability in ifconfig ioctls. This vulnerability, if exploited, allows
non-root attackers to use ifconfig to configure network interface
parameters for any network interface on a system.  Exploit information
regarding this problem has been made publicly available.

The following security bulletin is provided as a service to AUSCERT's
members.  As AUSCERT did not write this document, AUSCERT has had no
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Bulletin below.  If you have any questions or need further information,
please contact them directly.

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 		   Sun Microsystems, Inc. Security Bulletin
Bulletin Number:	#00152
Date: 			August 25, 1997
Title:			Vulnerability in ifconfig ioctls
Permission is granted for the redistribution of this Bulletin, so long as 
the Bulletin is not edited and is attributed to Sun Microsystems. Portions 
may also be excerpted for re-use in other security advisories so long as 
proper attribution is included.

Any other use of this information without the express written consent of 
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all 
liability for any misuse of this information by any third party.

1.  Bulletins Topics

    Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, and 2.3
    (SunOS 5.5.1, 5.5, 5.4, and 5.3) which relate to a vulnerability in 
    ifconfig ioctls.
    Sun strongly recommends that you install the patches listed in section 4 
    immediately on systems running SunOS 5.5.1, 5.5, 5.4, and 5.3.

2.  Who is Affected
    Vulnerable:  SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
                                5.4, 5.4_x86, 5.3
    Not vulnerable: All other supported versions of SunOS.
    The vulnerability is fixed in Solaris 2.6.

3.  Understanding the Vulnerability

    The command ifconfig assigns addresses to network interfaces and 
    configures network interface parameters. The use of ifconfig to configure 
    network interface parameters is restricted to superusers. This 
    vulnerability, if exploited, allows non-root attackers to use ifconfig
    to configure network interface parameters for any network interface on 
    a system.
4.  List of Patches

    The vulnerability in ifconfig ioctls is fixed by the following patches:

    OS version          Patch ID
    __________		________
    SunOS 5.5.1		103640-09		
    SunOS 5.5.1_x86	103641-09	
    SunOS 5.5		103093-14	
    SunOS 5.5_x86	103094-11	
    SunOS 5.4		101945-50	
    SunOS 5.4_x86	101946-44	
    SunOS 5.3		101318-87	

5.  Checksum Table

    The checksum table below shows the BSD checksums (SunOS 5.x: /usr/ucb/sum),
    SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures 
    for the above-mentioned patches that are available from:
    These checksums may not apply if you obtain patches from your answer

File Name	  BSD	      SVR4	   MD5
_______________   _________   __________   ________________________________
103640-09.tar.Z   08357 3832  24559 7663   C79A3D0E0CC610638C60BF25DB625559
103641-09.tar.Z   10615 825   9869 1649    B64D85F18E8B74E0DE251BCAA0AD10DE
103093-14.tar.Z   51571 2293  26450 4586   4EA9F527F219C836740DF51C7374F5E4
103094-11.tar.Z   03030 802   64820 1604   75AB9D22CDB03861B5CA9941752A1F57
101945-50.tar.Z   04413 10909 4073 21817   198EAAAC3D92898622351C43F87E884F
101946-44.tar.Z   10072 5540  36413 11080  92D61AD71C77F56CA1DF6038D644B4F9
101318-87.tar.Z   45783 11292 55998 22584  395AD525FD411904A3BD03E7E02EED10

A.  Patches listed in this bulletin are available to all Sun customers via 
    World Wide Web at:
    Customers with Sun support contracts can also obtain patches from local 
    Sun answer centers and SunSITEs worldwide.

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C.  Sun Security Coordination Team's PGP key is available via World Wide Web 

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