The hp-plugin utility in HP Linux Imaging and Printing (HPLIP) makes it easier for man-in-the-middle attackers to execute arbitrary code by leveraging use of a short GPG key id from a keyserver to verify print plugin downloads.
lists.fedoraproject.org/pipermail/package-announce/2015-July/162442.html
lists.fedoraproject.org/pipermail/package-announce/2015-July/162880.html
www.openwall.com/lists/oss-security/2015/05/29/2
www.securityfocus.com/bid/74913
www.ubuntu.com/usn/USN-2699-1
bugs.launchpad.net/hplip/+bug/1432516
bugzilla.redhat.com/show_bug.cgi?id=1227252