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[MS] Mehrere Schwachstellen in SMB2 - MS09-050

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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

CVE-2009-2526 - Denial of Service Schwachstelle in der SMBv2

  Eine Schwachstelle in der Unterstuetzung fuer das SMB2-Protokoll in
  Microsoft Windows kann zu einem Absturz des Systems fuehren. Grund
  hierfuer ist ein Fehler beim Ueberpruefen von Feldern im SMBv2
  Header. Ein Angreifer kann diese Schwachstelle ausnutzen um einen
  Denial of Service Angriff auf ein betroffenes System zu starten.

  Von dieser Schwachstelle sind nur Systeme betroffen, bei denen die
  Unterstuetzung fuer SMB-Dateifreigaben aktiviert ist.

CVE-2009-2532 / CVE-2009-3103 - Schwachstellen in der Unterstuetzung des
SMB Protokolls in Micrososft Windows

  Die in Microsoft Windows enthaltene Unterstuetzung des SMB-Protokolls
  enthaelt mehrere Schwachstellen bei der Verarbeitung von
  Network-Message- und SMB-Paketen. Gelingt es einem entfernten
  Angreifer diese Schwachstellen auszunutzen, so kann er beliebige
  Befehle mit Administratorrechten auf dem System ausfuehren. 

  Bitte beachten sie, dass bereits mehrere Exploits fuer diese 
  Schwachstellen vorhanden sind.

Betroffen sind die folgenden Software Pakete und Plattformen:

  Microsoft Windows 2000 Service Pack 4
  Windows XP Service Pack 2 und 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 Service Pack 2 fuer Itanium-Systeme
  Windows 7 fuer 32-Bit System
  Windows 7 fuer x64-basierte Systeme
  Windows Server 2008 R2 fuer x64-basierte Systeme
  Windows Server 2008 R2 fuer Itanium-basierte Systeme

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:

(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

Mit freundlichen Gruessen,
   Michael Groening, DFN-CERT
- -- 

Michael Groening (Incident Response Team)

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone  +49 40 808077-555
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             AUSCERT External Security Bulletin Redistribution

        Vulnerabilities in SMBv2 Could Allow Remote Code Execution
                              14 October 2009


        AusCERT Security Bulletin Summary

Product:           SMBv2
Publisher:         Microsoft
Operating System:  Windows Vista
                   Windows Server 2008
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-2526  

Original Bulletin: 

- - --------------------------BEGIN INCLUDED TEXT--------------------

Microsoft Security Bulletin MS09-050 - Critical

Vulnerabilities in SMBv2 Could Allow Remote Code Execution (975517)

  Published: October 13, 2009

  Version: 1.0

General Information

Executive Summary

  This security update resolves one publicly disclosed and two privately 
  reported vulnerabilities in Server Message Block Version 2 (SMBv2). The most 
  severe of the vulnerabilities could allow remote code execution if an 
  attacker sent a specially crafted SMB packet to a computer running the Server 
  service. Firewall best practices and standard default firewall configurations 
  can help protect networks from attacks that originate from outside the 
  enterprise perimeter. Best practices recommend that systems that are 
  connected to the Internet have a minimal number of ports exposed.

  This security update is rated Critical for supported editions of Windows 
  Vista and Windows Server 2008. For more information, see the subsection, 
  Affected and Non-Affected Software, in this section.

  The security update addresses the vulnerabilities by correctly validating the 
  fields inside the SMBv2 packets, correcting the way that SMB handles the 
  command value in SMB packets, and correcting the way that SMB parses 
  specially crafted SMB packets. For more information about the 
  vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the 
  specific vulnerability entry under the next section, Vulnerability 

  This security update also addresses the vulnerability first described in 
  Microsoft Security Advisory 975497.

  Recommendation. The majority of customers have automatic updating enabled and 
  will not need to take any action because this security update will be 
  downloaded and installed automatically. Customers who have not enabled 
  automatic updating need to check for updates and install this update manually. 
  For information about specific configuration options in automatic updating, 
  see Microsoft Knowledge Base Article 294871.

  For administrators and enterprise installations, or end users who want to 
  install this security update manually, Microsoft recommends that customers 
  apply the update immediately using update management software, or by checking 
  for updates using the Microsoft Update service.

  See also the section, Detection and Deployment Tools and Guidance, later in 
  this bulletin.

  Known Issues. None

Affected Software
    Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service 
    Pack 2

    Windows Vista x64 Edition, 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 Server Core installation 

    Windows Server 2008 for x64-based Systems and Windows Server 2008 for 
    x64-based Systems Service Pack 2 (Windows Server 2008 Server Core 
    installation affected)

    Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for 
    Itanium-based Systems Service Pack 2

Vulnerability Information

SMBv2 Infinite Loop Vulnerability - CVE-2009-2526

  A denial of service vulnerability exists in the way that Microsoft Server  
  Message Block (SMB) Protocol software handles specially crafted SMB version 2 
  (SMBv2) packets. An attempt to exploit the vulnerability would not require 
  authentication, allowing an attacker to exploit the vulnerability by sending a 
  specially crafted network message to a computer running the Server service. An 
  attacker who successfully exploited this vulnerability could cause the computer 
  to stop responding until restarted.

- - --------------------------END INCLUDED TEXT--------------------

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If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:


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