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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

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        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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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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