Apple Security Advisory 2013-09-18-3 - Xcode 5.0 is now available and addresses a security issue in Git. When using the imap-send command, git did not verify that the server hostname matched a domain name in the X.509 certificate, which allowed a man-in-the-middle attacker to spoof SSL servers via an arbitrary valid certificate. This issue was addressed by updating git to version 1.8.3.1.
36470237c2b9e2979b0fb025e050ba382aeb9d886ccd43cd170b2d45dd2f3523Red Hat Security Advisory 2013-0589-01 - Git is a fast, scalable, distributed revision control system. It was discovered that Git's git-imap-send command, a tool to send a collection of patches from standard input to an IMAP folder, did not properly perform SSL X.509 v3 certificate validation on the IMAP server's certificate, as it did not ensure that the server's hostname matched the one provided in the CN field of the server's certificate. A rogue server could use this flaw to conduct man-in-the-middle attacks, possibly leading to the disclosure of sensitive information.
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