startBristol in Bristol 0.60.5 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.
http://www.vupen.com/english/advisories/2010/2972
http://www.securityfocus.com/bid/44335
http://secunia.com/advisories/42272
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050805.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050787.html
http://lists.fedoraproject.org/pipermail/package-announce/2010-November/050784.html