An unspecified J2EE core service in the J2EE Engine in SAP NetWeaver does not properly restrict access, which allows remote attackers to read and write to arbitrary files via unknown vectors.
https://service.sap.com/sap/support/notes/1682613
http://www.onapsis.com/research-advisories.php
http://www.onapsis.com/get.php?resid=adv_onapsis-2013-004
http://scn.sap.com/docs/DOC-8218
http://archives.neohapsis.com/archives/bugtraq/2013-02/0133.html