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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgende Warnung des Microsoft Product Security
Notification Service. Wir geben diese Informationen unveraendert an Sie
weiter.

CVE-2010-2743 – Schwachstelle beim Laden von bestimmten Tastatur-Layouts

Beim Laden bestimmter Tastatur-Layouts durch Windows Kerneltreiber
existiert eine Schwachstelle, die ein lokaler Angreifer ausnutzen kann
um beliebigen Code im Kernel-Mode auszufuehren.

CVE-2010-2744 – Win32k “Window Class” Schwachstelle

In den Windows Kerneltreibern existiert eine Schwachstelle bei der
Verarbeitung von “window class” Daten. Ein lokaler Angreifer, der diese
Schwachstelle ausnutzt, koennte beliebigen Code im Kernel-Mode
ausfuehren.

CVE-2010-2549 – Schwachstelle im Referenzaehler von Microsoft Windows
Vista und Server 2008

In Microsoft Windows Vista und Server 2008 gibt es eine Schwachstelle in
der Funktion LockProcessByClientId(). Wird die Funktion
NtUserCheckAccessForIntegrityLevel() sehr haeufig aufgerufen, kann ein
Fehler in der Funktion LockProcessByClientId() ausgenutzt werden, der
dafuer sorgt, dass ein Objekt geloescht wird, obwohl es noch in
Benutzung ist. Ein lokaler Angreifer kann dies ausnutzen, um einen
Denial-of-Service Angriff auszufuehren.

Betroffen sind die folgenden Software Pakete und Plattformen:

Windows Kerneltreiber

Windows XP
Windows Vista
Windows 7
Windows Server 2003
Windows Server 2008

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,
Tilmann Haak

– —
Dipl.-Inform. Tilmann Haak (Incident Response Team)

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-590
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

Automatische Warnmeldungen: https://www.cert.dfn.de/autowarn

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AUSCERT External Security Bulletin Redistribution

ESB-2010.0909
Vulnerabilities in Windows Kernel-Mode Drivers Could Allow
Elevation of Privilege
13 October 2010

===========================================================================

AusCERT Security Bulletin Summary
———————————

Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows XP
Windows Vista
Windows 7
Windows Server 2003
Windows Server 2008
Impact/Access: Administrator Compromise — Existing Account
Increased Privileges — Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2010-2744 CVE-2010-2743 CVE-2010-2549

Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS10-073.mspx

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Microsoft Security Bulletin MS10-073 – Important

Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of
Privilege (981957)

Version: 1.0

General Information

Executive Summary

This security update resolves several publicly disclosed vulnerabilities in
the Windows kernel-mode drivers. The most severe of these vulnerabilities
could allow elevation of privilege if an attacker logs on to an affected
system and runs a specially crafted application. An attacker must have valid
logon credentials and be able to log on locally to exploit this vulnerability.
The vulnerability could not be exploited remotely or by anonymous users.

This security update is rated Important for all supported editions of
Microsoft Windows. For more information, see the subsection, Affected and
Non-Affected Software, in this section.

Affected Software

Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit
Systems Service Pack 2
Windows Server 2008 for x64-based Systems and Windows Server 2008 for
x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for
Itanium-based Systems Service Pack 2
Windows Server 2008 R2 for x64-based Systems Windows Server 2008 R2 for
Itanium-based Systems

Vulnerability Information

Win32K Reference Count Vulnerability – CVE-2010-2549

An elevation of privilege vulnerability exists due to the way that the Windows
kernel-mode drivers maintain the reference count for an object. An attacker
who successfully exploited this vulnerability could run arbitrary code in
kernel mode. An attacker could then install programs; view, change, or delete
data; or create new accounts with full user rights.

Win32K Keyboard Layout Vulnerability – CVE-2010-2743

An elevation of privilege vulnerability exists due to the way that the Windows
kernel-mode drivers load specific keyboard layouts. An attacker who
successfully exploited this vulnerability could run arbitrary code in kernel
mode. An attacker could then install programs; view, change, or delete data;
or create new accounts with full user rights.

Win32k Window Class Vulnerability – CVE-2010-2744

An elevation of privilege vulnerability exists when the Windows kernel-mode
drivers do not properly validate window class data. An attacker who
successfully exploited this vulnerability could run arbitrary code in kernel
mode. An attacker could then install programs; view, change, or delete data;
or create new accounts with full user rights.

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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 auscert@auscert.org.au
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:

http://www.auscert.org.au/render.html?cid=1980

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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.
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