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Category:   OS (Microsoft)  >   Windows Kernel Vendors:   Microsoft
Windows 2000 Kernel Winlogon Alternate Path Lets Local Users Gain Elevated Privileges.
SecurityTracker Alert ID:  1016662
SecurityTracker URL:  http://securitytracker.com/id/1016662
CVE Reference:   CVE-2006-3443   (Links to External Site)
Date:  Aug 8 2006
Impact:   Execution of arbitrary code via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2000 SP4
Description:   A vulnerability was reported in the Windows 2000 Kernel. A local user can obtain elevated privileges on the target system.

Windows 2000 Winlogon allows a local user to specify an invalid path. The local user can create a specially crafted DLL in the user's 'UserProfile' directory to cause the DLL to be executed with elevated privileges when the system reboots.

Microsoft credits Reed Arvin of Canaudit, Inc with reporting this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   The vendor has issued the following fix (as part of a larger fix that includes Windows 2003 and Windows XP fixes):

Microsoft Windows 2000 Service Pack 4:

http://www.microsoft.com/downloads/details.aspx?FamilyId=83e0c6fb-a542-463a-88fd-dc388605a8ae"

Microsoft Windows XP Service Pack 1 and Microsoft Windows XP Service Pack 2:

http://www.microsoft.com/downloads/details.aspx?FamilyId=71e96afc-bc4d-4666-998b-49857007e539"

Microsoft Windows XP Professional x64 Edition:

http://www.microsoft.com/downloads/details.aspx?FamilyId=a6fe5b95-11d1-42cd-995c-c8cef8a27aef"

Microsoft Windows Server 2003 and Microsoft Windows Server 2003 Service Pack 1:

http://www.microsoft.com/downloads/details.aspx?FamilyId=7d0f888b-df35-40df-baff-0bae2b921aef"

Microsoft Windows Server 2003 for Itanium-based Systems and Microsoft Windows Server 2003 with SP1 for Itanium-based Systems:

http://www.microsoft.com/downloads/details.aspx?FamilyId=df365b0b-f97f-4df1-9105-d81b68a110eb"

Microsoft Windows Server 2003 x64 Edition:

http://www.microsoft.com/downloads/details.aspx?FamilyId=3f750ad5-5bfb-4421-a316-ae66f0557eac"

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms06-051.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms06-051.mspx (Links to External Site)
Cause:   Access control error

Message History:   None.


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