Pkg xen devel - Nov 2007 - Bug#451626: CVE-2007-5907, CVE-2007-5906 possible denial of service vulnerability

Package: xen-3
Version: 3.1.0-1
Severity: grave
Tags: security patch

Hi,
the following CVE (Common Vulnerabilities & Exposures) id was
published for xen-3.

CVE-2007-5907[0]:
| Xen 3.1.1 does not prevent modification of the CR4 TSC from
| applications, which allows pv guests to cause a denial of service
| (crash).

CVE-2007-5906[1]:
| Xen 3.1.1 allows virtual guest system users to cause a 
| denial of service (hypervisor crash) by using a debug 
| register (DR7) to set certain breakpoints.

If you fix this vulnerability please also include the CVE id
in your changelog entry.

A patch for these issues is linked on the mitre website.
The xen version in etch is also affected.

For further information:
[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5907
[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5906

Kind regards
Nico

-- 
Nico Golde - http://www.ngolde.de - nion at jabber.ccc.de - GPG: 0x73647CFF
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On Sat, Nov 17, 2007 at 04:39:27PM +0100, Nico Golde
wrote:
> CVE-2007-5907[0]:
> | Xen 3.1.1 does not prevent modification of the CR4 TSC from
> | applications, which allows pv guests to cause a denial of service
> | (crash).
Submitted patch looks too different to applied version. Not reviewed.
Postponed until someone shows that it is a crash in the hypervisor, the
commit is not marked as security fix.
> CVE-2007-5906[1]:
> | Xen 3.1.1 allows virtual guest system users to cause a 
> | denial of service (hypervisor crash) by using a debug 
> | register (DR7) to set certain breakpoints.
Fixed in xen-3.1-testing.hg in changeset 15493:27347d6d73a3, included in
3.1.2.

Bastian

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