tpp 1.3.1 allows remote attackers to execute arbitrary commands via a --exec command in a TPP template file.
https://github.com/akrennmair/tpp/pull/2
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-2163
http://www.openwall.com/lists/oss-security/2013/06/21/4