The DataLoader::doStart function in dataloader.cpp in QGit 1.5.6 and other versions up to 2pre1 allows local users to overwrite arbitrary files and execute arbitrary code via a symlink attack on temporary files with predictable filenames.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36503
https://bugzilla.redhat.com/show_bug.cgi?id=268381
http://www.vupen.com/english/advisories/2007/3107
http://www.securityfocus.com/bid/25618
http://sourceforge.net/project/shownotes.php?release_id=538002&group_id=139897
http://sourceforge.net/project/shownotes.php?release_id=538002
http://security.gentoo.org/glsa/glsa-200710-05.xml
http://secunia.com/advisories/27098
http://secunia.com/advisories/26745
http://secunia.com/advisories/26738