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Category:   OS (Microsoft)  >   Microsoft DNS Server Vendors:   Microsoft
Microsoft DNS Server Registration Validation Flaw Lets Remote Users Conduct Spoofing Attacks
SecurityTracker Alert ID:  1021830
SecurityTracker URL:  http://securitytracker.com/id/1021830
CVE Reference:   CVE-2009-0093   (Links to External Site)
Date:  Mar 10 2009
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2000 SP4, 2003 SP2, 2008; and prior service packs
Description:   A vulnerability was reported in Microsoft DNS Server. A remote user can conduct a man-in-the-middle attack to spoof the system.

The server does not properly restrict registration of Web Proxy Auto-Discovery (WPAD) or Intra-Site Automatic Tunnel Addressing Protocol (ISATAP) entries on the DNS server. If the name registration does not exist, a remote user can register a WPAD or ISATAP entry and spoof the legitimate web proxy or ISATAP route and intercept or redirect Internet traffic.

Impact:   A remote user can spoof the legitimate web proxy or ISATAP route and intercept or redirect Internet traffic.
Solution:   The vendor has issued the following fixes:

DNS server on Microsoft Windows 2000 Server Service Pack 4:

http://www.microsoft.com/downloads/details.aspx?familyid=110354f7-5ece-4c4d-b563-3adba6ac0116

DNS server on Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=6cc42c9e-c34e-4577-8b23-9e07e2369878

DNS server on Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=b1f81fd2-0099-4450-8543-0459561d22d0

DNS server on Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=d3ed7d9a-d652-4bd0-aecc-5a415bec6c59

DNS server on Windows Server 2008 for 32-bit Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=92e89882-d656-4b61-a05c-3afb44895f08

DNS server on Windows Server 2008 for x64-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=be068d06-5939-4ad8-8191-e85931ed610f

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms09-008.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms09-008.mspx (Links to External Site)
Cause:   Access control error

Message History:   None.


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