The administration module for Oracle Web Cache in Oracle9iAS (9i Application Suite) 9.0.2 allows remote attackers to cause a denial of service (crash) via (1) an HTTP GET request containing a ".." (dot dot) sequence, or (2) a malformed HTTP GET request with a chunked Transfer-Encoding with missing data.
http://www.securityfocus.com/bid/5902
http://www.iss.net/security_center/static/10284.php
http://otn.oracle.com/deploy/security/pdf/2002alert43rev1.pdf