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ESB-2009.1402 - ALERT [Win] Microsoft IIS: Denial of service - Remote/unauthenticated

Date: 14 October 2009

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1402
          Vulnerabilities in FTP Service for Internet Information
                Services Could Allow Remote Code Execution
                              14 October 2009

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

Product:           Microsoft Internet Information Services (IIS) 5.0
                   Microsoft Internet Information Services (IIS) 5.1
                   Microsoft Internet Information Services (IIS) 6.0
                   Microsoft Internet Information Services (IIS) 7.0
Publisher:         Microsoft
Operating System:  Windows 2000
                   Windows XP
                   Windows Server 2003
                   Windows Vista
                   Windows Server 2008
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade

Original Bulletin: 
   http://www.microsoft.com/technet/security/bulletin/ms09-053.mspx

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Microsoft Security Bulletin MS09-053 - Important

Vulnerabilities in FTP Service for Internet Information Services Could Allow 
Remote Code Execution (975254)

Published: October 13, 2009

Version: 1.0

General Information

Executive Summary

  This security update resolves two publicly disclosed vulnerabilities in the 
  FTP Service in Microsoft Internet Information Services (IIS) 5.0, Microsoft 
  Internet Information Services (IIS) 5.1, Microsoft Internet Information 
  Services (IIS) 6.0, and Microsoft Internet Information Services (IIS) 7.0. 
  On IIS 7.0, only FTP Service 6.0 is affected. The vulnerabilities could allow 
  remote code execution (RCE) on systems running FTP Service on IIS 5.0, or 
  denial of service (DoS) on systems running FTP Service on IIS 5.0, IIS 5.1, 
  IIS 6.0 or IIS 7.0.

  This security update is rated Important for IIS 5.0; IIS 5.1; IIS 6.0; and 
  FTP Service 6.0 on IIS 7.0. For more information, see the subsection, 
  Affected and Non-Affected Software, in this section.

  The security update addresses the vulnerabilities by modifying the way that 
  the FTP Service handles list operations. 

  This security update also addresses the vulnerability first described in 
  Microsoft Security Advisory 975191.

  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 at the earliest opportunity using update management 
  software, or by checking for updates using the Microsoft Update service.

  Known Issues. Microsoft Knowledge Base Article 975254 documents the currently 
  known issues that customers may experience when installing this security 
  update. The article also documents recommended solutions for these issues.

Affected Software

    Microsoft Windows 2000 Service Pack 4 

    Windows XP Service Pack 2 and 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, 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 
    affected)

    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

IIS FTP Service DoS Vulnerability - CVE-2009-2521

  A vulnerability exists in the FTP Service in Microsoft Internet Information 
  Services (IIS) 5.0, Microsoft Internet Information Services (IIS) 5.1, 
  Microsoft Internet Information Services (IIS) 6.0, and Microsoft Internet 
  Information Services (IIS) 7.0. The vulnerability could allow denial of 
  service (DoS).

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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
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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.

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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

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:

        http://www.auscert.org.au/render.html?it=3192

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