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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1609
         Important Vulnerabilities in Active Directory Federation
                Services Could Allow Remote Code Execution
                              9 December 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Active Directory Federation Services (ADFS)
Publisher:         Microsoft
Operating System:  Windows Server 2003
                   Windows Server 2008
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Unauthorised Access             -- Console/Physical
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-2509 CVE-2009-2508 

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS09-070.mspx

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Microsoft Security Bulletin MS09-070

Important Vulnerabilities in Active Directory Federation Services Could Allow
Remote Code Execution (971726) 

  Published: December 08, 2009

  Version: 1.0

General Information

Executive Summary

  This security update resolves two privately reported vulnerabilities in 
  Microsoft Windows. The more severe of these vulnerabilities could allow
  remote code execution if an attacker sent a specially crafted HTTP request to
  an ADFS-enabled Web server. An attacker would need to be an authenticated
  user in order to exploit either of these vulnerabilities.

  This security update is rated Important for affected releases of Windows 
  Server 2003, Windows Server 2003 x64 Edition, Windows Server 2008, and
  Windows Server 2008 x64 Edition. For more information, see the subsection,
  Affected and Non-Affected Software, in this section.

  The security update addresses the vulnerabilities by correcting the
  validation that ADFS-enabled Web servers apply to request headers submitted
  by a Web client. For more information about the vulnerabilities, see the
  Frequently Asked Questions (FAQ) subsection for the specific vulnerability
  entry under  the next section, Vulnerability Information.

Affected Software

  Windows Server 2003 Service Pack 2
  Windows Server 2003 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

Vulnerability Information

Single Sign On Spoofing in ADFS Vulnerability - CVE-2009-2508

  A spoofing vulnerability in Active Directory Federation Services could
  allow an attacker to impersonate an authenticated user if the attacker
  has access to a workstation and Web browser recently used by the targeted
  user to access a Web site that offers single sign on.

Remote Code Execution in ADFS Vulnerability - CVE-2009-2509

  A remote code execution vulnerability exists in implementations of Active 
  Directory Federation Services (ADFS). The vulnerability is due to incorrect 
  validation of request headers when an authenticated user connects to an ADFS 
  enabled Web server. An attacker who successfully exploited this vulnerability
  could take complete control of an affected system.

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The University of Queensland
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