The image parser in OpenStack Cinder 7.0.2 and 8.0.0 through 8.1.1; Glance before 11.0.1 and 12.0.0; and Nova before 12.0.4 and 13.0.0 does not properly limit qemu-img calls, which might allow attackers to cause a denial of service (memory and disk consumption) via a crafted disk image.
rhn.redhat.com/errata/RHSA-2016-2923.html
rhn.redhat.com/errata/RHSA-2016-2991.html
rhn.redhat.com/errata/RHSA-2017-0153.html
rhn.redhat.com/errata/RHSA-2017-0156.html
rhn.redhat.com/errata/RHSA-2017-0165.html
rhn.redhat.com/errata/RHSA-2017-0282.html
www.openwall.com/lists/oss-security/2016/10/06/8
www.securityfocus.com/bid/76849
launchpad.net/bugs/1449062