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Category:   OS (Microsoft)  >   Windows Kernel Vendors:   Microsoft
Windows Vista Kernel ALPC Validation Flaw Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1019075
SecurityTracker URL:  http://securitytracker.com/id/1019075
CVE Reference:   CVE-2007-5350   (Links to External Site)
Date:  Dec 11 2007
Impact:   Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Vista
Description:   A vulnerability was reported in the Windows Vista kernel. A local user can obtain elevated privileges on the target system.

The kernel's Windows Advanced Local Procedure Call (ALPC) does not properly validate certain conditions in legacy reply paths. A local user can exploit this to gain elevated privileges on the target system.

Thomas Garnier of SkyRecon reported this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   The vendor has issued the following fixes:

Vista:

http://www.microsoft.com/downloads/details.aspx?familyid=9787619f-1297-411e-8b9c-3ad3e6a99797

Vista x64:

http://www.microsoft.com/downloads/details.aspx?FamilyID=5f382050-8df6-43aa-82e9-8fad5ff8ecec

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms07-066.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms07-066.mspx (Links to External Site)
Cause:   Input validation error

Message History:   None.


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