Xen Guest Destruction Memory Leak DoS (XSA-207)
Low Nessus Plugin ID 97388
SynopsisThe remote Xen hypervisor installation is missing a security update.
DescriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is missing a security update. It is, therefore, affected by a memory leak issue due to improper cleanup during guest destruction. A guest attacker can exploit this issue, via frequent rebooting, to eventually exhaust the system memory of the host system, resulting in a denial service condition. Note that Intel systems and systems without IOMMU/SMMU hardware are not affected by this vulnerability.
Nessus has not tested for this vulnerability but has instead relied only on the changeset versions based on the xen.git change log.
Additionally, Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
SolutionApply the appropriate patch according to the vendor advisory.