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Date: Wed, 4 Jun 2014 11:00:16 -0400 (EDT)
From: cve-assign@...re.org
To: security@....org
Cc: cve-assign@...re.org, oss-security@...ts.openwall.com
Subject: Re: Xen Security Advisory 98 - insufficient permissions checks accessing guest memory on ARM
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
> XSA-98
> When accessing guest memory Xen does not correctly perform permissions
> checks on the (possibly guest provided) virtual address ... This
> allows a guest to write to memory which it should only be able to
> read.
> In the event that a guest executes code from a page which has been
> shared read-only with another guest it would be possible to mount a
> take over attack on that guest.
Use CVE-2014-3969.
Our understanding is that "executes code from a page which has been
shared read-only" depends on the permissions issue (lack of a check
for execute permission), and is not an independent problem.
- --
CVE assignment team, MITRE CVE Numbering Authority
M/S M300
202 Burlington Road, Bedford, MA 01730 USA
[ PGP key available through http://cve.mitre.org/cve/request_id.html ]
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