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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-2011-1249 – Schwachstelle im Microsoft Ancillary Function Driver
(AFD)

Der Microsoft Ancillary Function Driver (AFD) (afd.sys) uebernimmt die
Winsock TCP/IP Kommunikation fuer einen aufrufenden Prozess und laeuft
im Kernel Mode. Die vom lokalen Prozessen angegebenen Daten werden vom
AFD dabei nicht ausreichend ueberprueft, so dass es beim Kopieren von
Daten in Kernel Buffer zu Fehlern kommen kann. Ein lokaler Angreifer
kann den Fehler mit Hilfe einer entsprechenden Anwendung ausnutzen und
so erweiterte Privilegien auf dem System zu erlangen.

Betroffen sind die folgenden Software Pakete und Plattformen:

Microsoft Windows

Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 mit SP2 fuer Itanium-basierte Systeme
Windows Vista Service Pack 1
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 1
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 fuer 32-bit Systeme
Windows Server 2008 fuer 32-bit Systeme Service Pack 2*
Windows Server 2008 fuer x64-basierte Systeme
Windows Server 2008 fuer x64-basierte Systeme Service Pack 2*
Windows Server 2008 fuer Itanium-basierte Systeme
Windows Server 2008 fuer Itanium-basierte Systeme Service Pack 2
Windows 7 fuer 32-bit Systeme
Windows 7 fuer 32-bit Systeme Service Pack 1
Windows 7 fuer x64-basierte Systeme
Windows 7 fuer x64-basierte Systeme Service Pack 1
Windows Server 2008 R2 fuer x64-basierte Systeme
Windows Server 2008 R2 fuer x64-basierte Systeme Service Pack 1*
Windows Server 2008 R2 fuer Itanium-basierte Systeme
Windows Server 2008 R2 fuer Itanium-basierte Systeme Service Pack 1

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,
Michael Groening, DFN-CERT
– —

Michael Groening (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-2011.0634
Vulnerability in Ancillary Function Driver Could Allow
Elevation of Privilege
15 June 2011

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

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

Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Impact/Access: Administrator Compromise — Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2011-1249

Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS11-046.mspx

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Microsoft Security Bulletin MS11-046 – Important
Vulnerability in Ancillary Function Driver Could Allow Elevation of Privilege
(2503665)
Version: 1.0

General Information

Executive Summary

This security update resolves a publicly disclosed vulnerability in the
Microsoft Windows Ancillary Function Driver (AFD). The vulnerability could
allow elevation of privilege if an attacker logs on to a user’s system and
runs a specially crafted application. An attacker must have valid logon
credentials and be able to log on locally to exploit the vulnerability.

This security update is rated Important for all supported versions 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 Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
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 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 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service
Pack 1
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for
x64-based Systems Service Pack 1*
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2
for Itanium-based Systems Service Pack 1

Vulnerability Information

Ancillary Function Driver Elevation of Privilege Vulnerability – CVE-2011-1249

An elevation of privilege vulnerability exists where the Ancillary Function
Driver (afd.sys) improperly validates input passed from user mode to the
kernel. The vulnerability could allow an attacker to run code with elevated
privileges. A local attacker who successfully exploited this vulnerability
could execute arbitrary code and take complete control of an affected system.
The 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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