Technical Description

A vulnerability has been identified in Microsoft Windows, which could be exploited by attackers to spoof and redirect Internet traffic from legitimate locations. This issue is caused by an error in the DNS Client service that does not provide enough entropy in its random choice of transaction values when performing DNS queries, which could allow an attacker who has successfully gained information about DNS client transaction IDs to use that information to send malicious responses to DNS requests.

Affected Products

Microsoft Windows 2000 Service Pack 4
Microsoft Windows XP Service Pack 2
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Professional x64 Edition Service Pack 2
Microsoft Windows Server 2003 Service Pack 1
Microsoft Windows Server 2003 Service Pack 2
Microsoft Windows Server 2003 x64 Edition
Microsoft Windows Server 2003 x64 Edition Service Pack 2
Microsoft Windows Server 2003 SP1 (Itanium)
Microsoft Windows Server 2003 SP2 (Itanium)
Microsoft Windows Vista
Microsoft Windows Vista x64 Edition

Solution

Apply patch for Microsoft Windows 2000 Service Pack 4 :
http://www.microsoft.com/downloads/details.aspx?FamilyId=41326ade-96b6-47ce-9291-d4e3039471c4

Apply patch for Microsoft Windows XP Service Pack 2 :
http://www.microsoft.com/downloads/details.aspx?FamilyID=893f4cef-0395-4c44-ba28-7a10b6e7dd48

Apply patch for Microsoft Windows XP x64 Edition :
http://www.microsoft.com/downloads/details.aspx?FamilyID=8fdd1207-6e93-4c43-bacc-fe3623a6ebe7

Apply patch for Microsoft Windows Server 2003 :
http://www.microsoft.com/downloads/details.aspx?FamilyId=214bd8f5-6eb2-414c-b013-c516a306d692

Apply patch for Microsoft Windows Server 2003 x64 Edition :
http://www.microsoft.com/downloads/details.aspx?FamilyId=fd123394-a5d6-4b55-be74-2938f52ce922

Apply patch for Microsoft Windows Server 2003 (Itanium) :
http://www.microsoft.com/downloads/details.aspx?FamilyId=e0e63f03-904d-47ee-94fc-51a8dea668eb

Apply patch for Microsoft Windows Vista :
http://www.microsoft.com/downloads/details.aspx?FamilyID=8203d303-c855-4579-9bbf-b06ddf5c1b87

Apply patch for Microsoft Windows Vista x64 Edition :
http://www.microsoft.com/downloads/details.aspx?FamilyID=73f3a234-3973-4467-be7e-69efa7ee978c

References

http://www.vupen.com/english/advisories/2008/1144
http://www.microsoft.com/technet/security/Bulletin/MS08-020.mspx

Credits

Vulnerability reported by Amit Klein (Trusteer), Alla Berzroutchko (Scanit) and .Roy Arends (Nominet UK)

ChangeLog

2008-04-08 : Initial release

Vulnerability Management

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