xen-kernel -- Information leak via internal x86 system device emulation
The Xen Project reports:
Emulation routines in the hypervisor dealing with certain system
devices check whether the access size by the guest is a supported
one. When the access size is unsupported these routines failed to
set the data to be returned to the guest for read accesses, so that
hypervisor stack contents are copied into the destination of the
operation, thus becoming visible to the guest.
A malicious HVM guest might be able to read sensitive data relating
to other guests.
Copyright © 2003-2005 Jacques Vidrine and contributors.
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