________________________________________________________________________
              THE COMPUTER INCIDENT ADVISORY CAPABILITY

                                 CIAC

                      INFORMATION    BULLETIN
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Vulnerability in DECODE alias

January 19, 1990, 1600 PST                                 	Number A-13

CIAC has learned of a UNIX vulnerability in the DECODE alias.  There is
a strong possibility that this vulnerability is currently being exploited.  
One workaround is to disable the DECODE alias by commenting out the line 
beginning with DECODE in either /etc/aliases or /usr/aliases.  If you 
do not wish to disable the DECODE alias, you can redirect DECODE to 
postmaster.

If you have questions, please contact CIAC:

	Eugene Schultz (415) 422-8193 or (FTS) 532-8193 
	FAX:  (415) 423-0913 or (FTS) 543-0913

CIAC's 24-hour emergency hot-line number is (415) 971-9384

or send e-mail to:  ciac@tiger.llnl.gov
 
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