Oracle Application Server (OracleAS) Portal 10g allows remote attackers to bypass intended access restrictions and read the contents of /dav_portal/portal/ by sending a request containing a trailing "%0A" (encoded line feed), then using the session ID that is generated from that request. NOTE: as of 20080512, Oracle has not commented on the accuracy of this report.
https://exchange.xforce.ibmcloud.com/vulnerabilities/42302
http://www.securitytracker.com/id?1020034
http://www.securityfocus.com/archive/1/491865/100/0/threaded