-----BEGIN PGP SIGNED MESSAGE-----
AUSCERT External Security Bulletin Redistribution
ulnerability in Hyper-V Could Allow Denial of Service (2345316)
15 December 2010
AusCERT Security Bulletin Summary
Operating System: Windows Server 2008
Impact/Access: Denial of Service -- Existing Account
CVE Names: CVE-2010-3960
- --------------------------BEGIN INCLUDED TEXT--------------------
Microsoft Security Bulletin MS10-102 - Important
Vulnerability in Hyper-V Could Allow Denial of Service (2345316)
This security update resolves a privately reported vulnerability in Windows
Server 2008 Hyper-V and Windows Server 2008 R2 Hyper-V. The vulnerability
could allow denial of service if a specially crafted packet is sent to the
VMBus by an authenticated user in one of the guest virtual machines hosted
by the Hyper-V server. An attacker must have valid logon credentials and
be able send specially crafted content from a guest virtual machine to
exploit this vulnerability. The vulnerability could not be exploited
remotely or by anonymous users.
This security update is rated Important for all supported x64-based editions
of Windows Server 2008 and Windows Server 2008 R2. For more information, see
the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerability by correcting the way that
the Hyper-V server validates malformed packets sent to the VMBus inside its
guest virtual machines. For more information about the vulnerability, see the
Frequently Asked Questions (FAQ) subsection for the specific vulnerability
entry under the next section, Vulnerability Information.
Windows Server 2008 for x64-based Systems*
Windows Server 2008 for x64-based Systems Service Pack 2*
Windows Server 2008 R2 for x64-based Systems*
*Server Core installation affected.
Hyper-V VMBus Vulnerability - CVE-2010-3960
A vulnerability exists in Windows Server 2008 Hyper-V and Windows Server 2008
R2 Hyper-V that could allow denial of service if a specifically crafted packet
is sent to the VMBus by an authenticated user in one of the guest virtual
machines hosted by the Hyper-V server. An attacker must have valid logon
credentials and be able to log on locally into a guest virtual machine to
exploit this vulnerability. The vulnerability could not be exploited remotely
or by anonymous users.
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to email@example.com
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: firstname.lastname@example.org
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
-----BEGIN PGP SIGNATURE-----
-----END PGP SIGNATURE-----