scripts/dscverify.pl in devscripts before 2.12.3 allows remote attackers to execute arbitrary commands via unspecified vectors related to "arguments to external commands."
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-2233
http://www.ubuntu.com/usn/USN-1593-1
http://www.securityfocus.com/bid/55564