CVE-2005-0953
Race condition in bzip2 1.0.2 and earlier allows local users to modify permissions of arbitrary files via a hard link attack on a file while it is being decompressed, whose permissions are changed by bzip2 after the decompression is complete.
Date published : 2005-04-03
http://lists.apple.com/archives/security-announce/2007/Nov/msg00002.html