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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Windows DNS Resolution LLMNR Processing Flaw Lets Remote Users Execute Arbitrary Code and Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1025332
SecurityTracker URL:  http://securitytracker.com/id/1025332
CVE Reference:   CVE-2011-0657   (Links to External Site)
Date:  Apr 12 2011
Impact:   Execution of arbitrary code via network, User access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): XP SP3, 2003 SP2, Vista SP2, 2008 SP2, 7 SP1, 2008 R2 SP1; and prior service packs
Description:   A vulnerability was reported in Microsoft Windows DNS resolution. A remote user can execute arbitrary code on the target system. A local user can obtain elevated privileges on the target system.

A remote user can send specially crafted Link-local Multicast Name Resolution (LLMNR) broadcast queries to trigger a flaw in 'DNSAPI.dll' and execute arbitrary code on the target system. The code will run with NetworkService privileges.

Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 are affected.

On Windows XP and Windows Server 2003, a local user can exploit this flaw to gain elevated (NetworkService) privileges.

Neel Mehta of Google Inc. reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system with NetworkService privileges.

A local user can obtain NetworkService privileges on the target system.

Solution:   The vendor has issued the following fixes:

Windows XP Service Pack 3:

http://www.microsoft.com/downloads/details.aspx?familyid=2D433ADB-BCAF-4C59-9405-A4892F8CCBA3

Windows XP Professional x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=29FF546E-A232-4F23-A223-C029C71FF1C6

Windows Server 2003 Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=753ED6E3-DF2E-4B2D-9E9F-7275CD94D214

Windows Server 2003 x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=A0192DBC-4D0D-4555-9EF7-3E10209A6389

Windows Server 2003 with SP2 for Itanium-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=F5AD6963-2D6A-4D59-9E25-4FC088647FCD

Windows Vista Service Pack 1 and Windows Vista Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=2A17E44F-54AA-423D-B3C7-A4F404F7C28B

Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=E708D24F-E348-4C4D-99ED-E78DD1689D01

Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=9894BE38-A582-4C15-AD0E-CC3AFAB2AEBC

Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=2D7D2021-020F-4CC9-A027-258D7E5FAEC9

Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?familyid=C0275DF0-10AC-4500-AB86-B7E9A34F8E1D

Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=8FDAE09B-D1BB-4EF5-AA45-2A05F2A5E12D

Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=40879DFB-EFA4-41BA-8D5C-22E926A55EEF

Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=2084C726-187E-41F9-9BEA-DA18F490D29E

Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?familyid=34D2793E-A2CD-49F6-B524-6598EA86175F

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms11-030.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms11-030.mspx (Links to External Site)
Cause:   Not specified

Message History:   None.


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