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Vigil@nce - Xen: information disclosure via GNTTABOP_setup_table

June 2014 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

A local attacker can read a memory fragment via
GNTTABOP_setup_table of Xen, in order to obtain sensitive
information.

Impacted products: Unix (platform)

Severity: 1/4

Creation date: 25/06/2014

DESCRIPTION OF THE VULNERABILITY

The GNTTABOP_setup_table hypercall returns the list of Domain
Grant Table Pages.

However, the alloc_domain_struct() function of the
xen/arch/arm/domain.c file does not initialize a memory area
before returning it to the user.

A local attacker can therefore read a memory fragment via
GNTTABOP_setup_table of Xen, in order to obtain sensitive
information.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Xen-information-disclosure-via-GNTTABOP-setup-table-14936


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