The undo save quit routine in the kernel in Blender 2.5, 2.63a, and earlier allows local users to overwrite arbitrary files via a symlink attack on the quit.blend temporary file. NOTE: this issue might be a regression of CVE-2008-1103.
https://developer.blender.org/T22509
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=584621
http://www.openwall.com/lists/oss-security/2012/09/07/13
http://www.openwall.com/lists/oss-security/2012/09/06/3
http://lists.opensuse.org/opensuse-updates/2013-02/msg00047.html