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Vigil@nce - Xen: denial of service via domctl

April 2015 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker in a guest system can call three domctl of Xen, in
order to trigger a denial of service.

 Impacted products: Fedora, Unix (platform)
 Severity: 1/4
 Creation date: 31/03/2015

DESCRIPTION OF THE VULNERABILITY

The domctl interface is used to manipulate Xen information.

However, the XEN_DOMCTL_gettscinfo, XEN_DOMCTL_settscinfo and
XEN_DOMCTL_resumedomain operations are not safe, and can be used
to block the host system.

An attacker in a guest system can therefore call three domctl of
Xen, in order to trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Xen-denial-of-service-via-domctl-16504


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