Xen Hypervisor xenstored Write Saturation DoS (XSA-206)
Low Nessus Plugin ID 99398
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 affected by a denial of service vulnerability in xenstored during processing of transactions. An attacker on the guest can exploit this vulnerability by issuing repeated writes to xenstore that conflict with transactions either of the toolstack or backends, such as the driver domain, causing the transactions made by these entities to fail indefinitely.
Note that Nessus has checked the changeset versions based on the xen.git change log. 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.