servermgrd in Apple Mac OS X before 10.6.8 allows remote attackers to read arbitrary files, and possibly send HTTP requests to intranet servers or cause a denial of service (CPU and memory consumption), via an XML-RPC request containing an entity declaration in conjunction with an entity reference, related to an XML External Entity (aka XXE) issue.
http://www.securityfocus.com/bid/48445
http://support.apple.com/kb/HT4723
http://lists.apple.com/archives/security-announce/2011//Jun/msg00000.html