Git before 1.8.5.6, 1.9.x before 1.9.5, 2.0.x before 2.0.5, 2.1.x...

Vulnerability Description

Git before 1.8.5.6, 1.9.x before 1.9.5, 2.0.x before 2.0.5, 2.1.x before 2.1.4, and 2.2.x before 2.2.1 on Windows and OS X; Mercurial before 3.2.3 on Windows and OS X; Apple Xcode before 6.2 beta 3; mine all versions before 08-12-2014; libgit2 all versions up to 0.21.2; Egit all versions before 08-12-2014; and JGit all versions before 08-12-2014 allow remote Git servers to execute arbitrary commands via a tree containing a crafted .git/config file with (1) an ignorable Unicode codepoint, (2) a git~1/config representation, or (3) mixed case that is improperly handled on a case-insensitive filesystem.

References

• https://news.ycombinator.com/item?id=8769667
• http://article.gmane.org/gmane.linux.kernel/1853266
• http://git-blame.blogspot.com/2014/12/git-1856-195-205-214-and-221-and.html
• http://mercurial.selenic.com/wiki/WhatsNew
• http://support.apple.com/kb/HT204147
• https://github.com/blog/1938-git-client-vulnerability-announced
• http://securitytracker.com/id?1031404
• https://github.com/libgit2/libgit2/commit/928429c5c96a701bcbcafacb2421a82602b36915
• https://libgit2.org/security/