dhis-dummy-log-engine in dhis-server 5.3 allows local users to overwrite arbitrary files via a symlink attack on the /tmp/dhis-dummy-log-engine.log temporary file.
https://bugs.gentoo.org/show_bug.cgi?id=235770
http://www.securityfocus.com/bid/30900
http://www.openwall.com/lists/oss-security/2008/10/30/2