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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-2011-1889 – Schwachstelle in Microsoft Forefront Threat Management
Gateway 2010 Client

Durch eine unzureichende Pruefung von Puffergrenzen bei Anfragen im
Winsock-Povider in der Funktion NSPLookupServiceNext() von TMG (Threat
Management Gateway) ist es einem entfernten Angreifer schlimmstenfalls
moeglich, beliebigen Code auszufuehren. Zur Ausnutzung der Schwachstelle
ist es notwendig, dass ein Nutzer mit einem TMG-Client dazu gebracht
wird, eine spezifische Anfrage zu senden.

Betroffen sind die folgenden Software Pakete und Plattformen:

Microsoft Forefront Threat Management Gateway 2010 Client

Alle Windows-Versionen, auf denen die Software lauffaehig ist.

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,
Timo Schulz

– —
Timo Schulz, M.Sc. (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-2011.0625
Vulnerability in Threat Management Gateway Firewall Client
Could Allow Remote Code Execution (2520426)
15 June 2011

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

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

Product: Microsoft Forefront Threat Management Gateway 2010 Client
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands — Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2011-1889

Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS11-040.mspx

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Microsoft Security Bulletin MS11-040 – Critical
Vulnerability in Threat Management Gateway Firewall Client Could Allow Remote
Code Execution (2520426)
Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in the
Microsoft Forefront Threat Management Gateway (TMG) 2010 Client, formerly
named the Microsoft Forefront Threat Management Gateway Firewall Client. The
vulnerability could allow remote code execution if an attacker leveraged a
client computer to make specific requests on a system where the TMG firewall
client is used.

This security update is rated Critical for Microsoft Forefront Threat
Management Gateway 2010 Client. For more information, see the subsection,
Affected and Non-Affected Software, in this section.

Affected Software

Microsoft Forefront Threat Management Gateway 2010 Client

Vulnerability Information

TMG Firewall Client Memory Corruption Vulnerability – CVE-2011-1889

A remote code execution vulnerability exists in the TMG Firewall Client
Winsock provider that could allow code execution in the security context of
the client application.

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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT’s members. As
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NOTE: This is only the original release of the security bulletin. It may
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Contact information for the authors of the original document is included
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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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