FreeBSD : xen-tools -- PCI MSI mask bits inadvertently exposed to guests (4db8a0f4-27e9-11e5-a4a5-002590263bf5)
High Nessus Plugin ID 84700
SynopsisThe remote FreeBSD host is missing a security-related update.
DescriptionThe Xen Project reports :
The mask bits optionally available in the PCI MSI capability structure are used by the hypervisor to occasionally suppress interrupt delivery. Unprivileged guests were, however, nevertheless allowed direct control of these bits.
Interrupts may be observed by Xen at unexpected times, which may lead to a host crash and therefore a Denial of Service.
SolutionUpdate the affected package.