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SYNTHESIS OF THE VULNERABILITY

An attacker can use a program based on xen-access.c of Xen, in
order to escalate his privileges.

– Impacted products: Unix (platform)
– Severity: 2/4
– Creation date: 17/06/2014

DESCRIPTION OF THE VULNERABILITY

The Xen product provides the xen-access.c example.

However, this example does not forbid the access to the Shared
Ring Page. Applications based on this example thus allow an
attacker who is located in a guest system to execute code on the
host.

An attacker can therefore use a program based on xen-access.c of
Xen, in order to escalate his privileges.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Xen-privilege-escalation-via-xen-access-c-14906