Authentication is required to exploit this vulnerability but may be bypassed. The specific flaw exists in the handling of the 'preauth' variable to the script index.php used in the administration server running on port 443. Due to improper filtering of user data a specially crafted request could lead to arbitrary commands being executed under the credentials of the service.
Patch Availability:
Oracle has issued an update to correct this vulnerability. More details can be found at:
http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujul2010.html