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AL-2007.0083 -- [Win] -- MS07-039 - Vulnerability in Windows Active Directory Could Allow Remote Code Execution

Date: 11 July 2007
References: ESB-2007.0551  

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===========================================================================
A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2007.0083 -- AUSCERT ALERT
                                   [Win]
        MS07-039 - Vulnerability in Windows Active Directory Could
                        Allow Remote Code Execution
                               11 July 2007

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

        AusCERT Alert Summary
        ---------------------

Product:              Microsoft Windows 2000 Server Service Pack 4
                      Windows Server 2003 Service Pack 1
                      Windows Server 2003 Service Pack 2
                      Windows Server 2003 x64 Edition
                      Windows Server 2003 x64 Edition Service Pack 2
                      Windows Server 2003 with SP1 for Itanium-based Systems
                      Windows Server 2003 with SP2 for Itanium-based Systems
Publisher:            Microsoft
Operating System:     Windows
Impact:               Administrator Compromise
                      Denial of Service
Access:               Remote/Unauthenticated
                      Existing Account
CVE Names:            CVE-2007-0040 CVE-2007-3028

Original Bulletin:    
   http://www.microsoft.com/technet/security/Bulletin/ms07-039.mspx

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Affected Products:

   - Microsoft Windows 2000 Server Service Pack 4
   - Windows Server 2003 Service Pack 1
   - Windows Server 2003 Service Pack 2
   - Windows Server 2003 x64 Edition
   - Windows Server 2003 x64 Edition Service Pack 2
   - Windows Server 2003 with SP1 for Itanium-based Systems
   - Windows Server 2003 with SP2 for Itanium-based Systems


Non-Affected Products:

   - Windows 2000 Professional Service Pack 4
   - Windows XP Service Pack 2
   - Windows XP Professional x64 Edition 
   - Windows XP Professional x64 Edition Service Pack 2
   - Windows Vista
   - Windows Vista x64 Edition
   - Active Directory Application Mode (ADAM) Service Pack 1


Full MS07-039 advisory:
   http://www.microsoft.com/technet/security/bulletin/ms07-039.mspx


Vulnerability Details:
	
Windows Active Directory Remote Code Execution Vulnerability - CVE-2007-0040

A remote code execution vulnerability exists in the way that Active Directory 
validates a LDAP request. An attacker who successfully exploited this 
vulnerability could take complete control of an affected system.

Windows Active Directory Denial of Service Vulnerability- CVE-2007-3028

A denial of service vulnerability exists in the way that Microsoft Active 
Directory validates a client-sent LDAP request. An attacker could exploit the 
vulnerability by sending a specially crafted LDAP request to a server running 
Active Directory. An attacker who successfully exploited this vulnerability 
could cause the server to temporarily stop responding.


Workaround Details:

Block at the firewall ports: TCP ports 389 and 3268

These ports are used to initiate connections with the affected component. 
Blocking these at the enterprise firewall, both inbound and outbound, will 
help prevent systems that are behind that firewall from attempts to exploit 
this vulnerability. We recommend that you block all unsolicited inbound 
communication from the Internet to help prevent attacks that may use other 
ports. For more information about ports, visit TCP and UDP Port Assignments.[1]


References:

  [1] TCP and UDP Port Assignments
      http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/cnet/cnfc_por_gdqc.mspx?mfr=true


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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.

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

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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