festival_server in Centre for Speech Technology Research (CSTR) Festival, probably 2.0.95-beta and earlier, 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.novell.com/show_bug.cgi?id=642507
http://www.securityfocus.com/bid/44395
http://lists.opensuse.org/opensuse-updates/2010-10/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00006.html