The dpkg-source command in Debian dpkg before 1.16.16 and 1.17.x before 1.17.25 allows remote attackers to bypass signature verification via a crafted Debian source control file (.dsc).
http://www.ubuntu.com/usn/USN-2566-1
http://www.debian.org/security/2015/dsa-3217
http://lists.opensuse.org/opensuse-updates/2015-06/msg00029.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157387.html