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CA-92:06 

Last Revised:  September 19,1997

                Attached copyright statement





                               CERT Advisory

                               March 19, 1992

                           AIX uucp Vulnerability



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The Computer Emergency Response Team/Coordination Center (CERT/CC) has

received information concerning a vulnerability with the UUCP software

in versions of AIX up to 2007.  The vulnerability does not exist in AIX 3.2.



IBM is aware of this problem, and a fix is available as apar number

"ix18516".  This patch is available for all AIX releases from GOLD to

2006.



The fix is in the 2007 update and 3.2 release of AIX.  IBM customers may

call IBM Support (800-237-5511) and ask that the fix be shipped to them.

Patches may be obtained outside the U.S. by contacting your local IBM

representative.



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I.   Description



     Previous versions, except AIX 3.2, of the UUCP software contained

     incorrectly configured versions of various files.





II.  Impact



     Local users can execute unauthorized commands and gain unauthorized

     root access.





III. Solution



     - If allowing users access to the uucp isn't necessary, disable it.



                % chmod 0100 /usr/bin/uucp



     - Obtain the fix from IBM Support.



     - Install the fix following the instructions in the README file.



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The CERT/CC would like to thank Steve Knodle, Clarkson University, for

bringing this security vulnerability to our attention.

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If you believe that your system has been compromised, contact CERT/CC or

your representative in FIRST (Forum of Incident Response and Security Teams).



Internet E-mail: cert@cert.org

Telephone: 412-268-7090 (24-hour hotline)

           CERT/CC personnel answer 7:30 a.m.-6:00 p.m. EST(GMT-5)/EDT(GMT-4),

           on call for emergencies during other hours.



Computer Emergency Response Team/Coordination Center (CERT/CC)

Software Engineering Institute

Carnegie Mellon University

Pittsburgh, PA 15213-3890



Past advisories, information about FIRST representatives, and other

information related to computer security are available for anonymous ftp

from cert.org (192.88.209.5).



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Copyright 1992 Carnegie Mellon University. Conditions for use, disclaimers,

and sponsorship information can be found in

http://www.cert.org/legal_stuff.html and http://ftp.cert.org/pub/legal_stuff .

If you do not have FTP or web access, send mail to cert@cert.org with

"copyright" in the subject line.



CERT is registered in the U.S. Patent and Trademark Office.





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Revision History:



September 19,1997  Attached Copyright Statement



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