The extension APIs in the kernel in Apple iOS before 8.1.3, Apple OS X before 10.10.2, and Apple TV before 7.0.3 do not prevent the presence of addresses within an OSBundleMachOHeaders key in a response, which makes it easier for attackers to bypass the ASLR protection mechanism via a crafted app.
lists.apple.com/archives/security-announce/2015/Jan/msg00000.html
lists.apple.com/archives/security-announce/2015/Jan/msg00001.html
lists.apple.com/archives/security-announce/2015/Jan/msg00003.html
support.apple.com/HT204244
support.apple.com/HT204245
support.apple.com/HT204246
www.securitytracker.com/id/1031650