FreeBSD: VID-e2fca11b-4212-11e6-942d-bc5ff45d0f28 (CVE-2016-4962): xen-tools -- Unsanitised guest input in libxl device handling code

The Xen Project reports: Various parts of libxl device-handling code inappropriately use information from (partially) guest controlled areas of xenstore. A malicious guest administrator can cause denial of service by resource exhaustion. A malicious guest administrator can confuse and/or deny service to management facilities. A malicious guest administrator of a guest configured with channel devices may be able to escalate their privilege to that of the backend domain (i.e., normally, to that of the host).