Multiple unspecified vulnerabilities in Git before 2.5.4, as used in Apple Xcode before 7.2, have unknown impact and attack vectors. NOTE: this CVE is associated only with Xcode use cases.
https://support.apple.com/HT205642
https://github.com/git/git/blob/master/Documentation/RelNotes/2.5.4.txt
http://www.securitytracker.com/id/1034340
http://lists.apple.com/archives/security-announce/2015/Dec/msg00004.html