include/tests_webservers in Lynis before 1.5.5 allows local users to overwrite arbitrary files via a symlink attack on a /tmp/lynis.*.unsorted file with an easily determined name.
http://seclists.org/fulldisclosure/2014/Jun/21
http://openwall.com/lists/oss-security/2014/06/07/3
http://openwall.com/lists/oss-security/2014/06/06/12