scripts/dget.pl in devscripts before 2.10.73 allows remote attackers to execute arbitrary commands via a crafted (1) .dsc or (2) .changes file, related to "arguments to external commands" that are not properly escaped, a different vulnerability than CVE-2012-2240.
http://www.ubuntu.com/usn/USN-1593-1
http://www.securityfocus.com/bid/55564