Actu
Vigil@nce - Xen: denial of service via Nested Virtualization
January 2013 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker, who is an administrator in a guest system, can use
the Nested Virtualization feature, in order to stop the Xen host
system.
Impacted products: Unix (platform)
Severity: 1/4
Creation date: 22/01/2013
DESCRIPTION OF THE VULNERABILITY
The Nested Virtualization feature is used to start a virtual
machine inside another virtual machine.
On a 64 bit processor, with a 32 bit hypervisor, and with more
than 16 VCPU, and with an HVM 64 bit guest system, the number of
resources used by the Nested Virtualization is greater than the
supported limit.
An attacker, who is an administrator in a guest system, can
therefore use the Nested Virtualization feature, in order to stop
the Xen host system.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/Xen-denial-of-service-via-Nested-Virtualization-12347
