Local root vulnerability in sendmail.
See http://www.netsys.com/cgi-bin/displaynews?a=556
which contains links to:
http://lists.netsys.com/pipermail/full-disclosure/2003-March/008972.html
http://www.netsys.com/library/alerts/sendmail-2003-03-29.txt
http://lists.netsys.com/pipermail/full-disclosure/2003-March/008973.html
Len