Qt Creator before 2.0.1 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/2010/2560
http://www.vupen.com/english/advisories/2010/2559
http://www.securityfocus.com/bid/43672
http://www.qt.gitorious.org/qt-creator/qt-creator/commit/3c00715c8e90c57953ec4a8716110f6954e524e4
http://www.mandriva.com/security/advisories?name=MDVSA-2010:193
http://qt.nokia.com/about/news/security-announcement-qt-creator-2.0.0-for-desktop-platforms