sfcb in sblim-sfcb places a zero-length directory name in the LD_LIBRARY_PATH, which allows local users to gain privileges via a Trojan horse shared library in the current working directory.
https://bugzilla.redhat.com/show_bug.cgi?id=838160
https://bugzilla.novell.com/show_bug.cgi?id=770234
http://www.openwall.com/lists/oss-security/2012/07/06/8
http://www.openwall.com/lists/oss-security/2012/07/06/7
http://sourceforge.net/tracker/index.php?func=detail&aid=3541554&group_id=128809&atid=712784