The remove_bad_chars function in utils/cups-browsed.c in cups-filters before 1.0.66 allows remote IPP printers to execute arbitrary commands via consecutive shell metacharacters in the (1) model or (2) PDL. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-2707.
http://www.ubuntu.com/usn/USN-2532-1
http://www.mandriva.com/security/advisories?name=MDVSA-2015:196
http://lists.opensuse.org/opensuse-updates/2015-07/msg00033.html
http://bzr.linuxfoundation.org/loggerhead/openprinting/cups-filters/revision/7333