WebDAV Sharing in Apple Mac OS X 10.7.x before 10.7.3 does not properly perform authentication, which allows local users to gain privileges by leveraging access to (1) the server or (2) a bound directory. Per: http://support.apple.com/kb/HT5130
'This issue does not affect systems prior to OS X Lion.'
Publication date: Fri, 03 Feb 2012 00:55:00 +0000