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Category:   OS (Microsoft)  >   Microsoft Task Scheduler Vendors:   Microsoft
Microsoft Windows Task Scheduler Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1024874
SecurityTracker URL:  http://securitytracker.com/id/1024874
CVE Reference:   CVE-2010-3338   (Links to External Site)
Date:  Dec 14 2010
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Vista SP2, 2008 SP2, 7, 2008 R2; and prior service packs
Description:   A vulnerability was reported in Windows Task Scheduler. A local user can obtain elevated privileges on the target system.

The Task Scheduler does not properly validate whether a scheduled task is running within the intended security context. A local user can schedule an arbitrary task to run in the context of the System or Administrator accounts.

Sergey Golovanov, Alexander Gostev, Maxim Golovkin, and Alexey Monastyrsky of Kaspersky Lab, Vitaly Kiktenko and Alexander Saprykin of Design and Test Lab, Liam O Murchu of Symantec, and Alexandr Matrosov, Eugene Rodionov, Juraj Malcho, and David Harley of ESET reported this vulnerability.

Impact:   A local user can schedule an arbitrary task to run in the context of the System or Administrator accounts.
Solution:   The vendor has issued the following fixes:

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

http://www.microsoft.com/downloads/details.aspx?familyid=48F10251-34D8-4149-B4B2-BF3EC28F5846

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

http://www.microsoft.com/downloads/details.aspx?familyid=099CCC5F-B92F-4D06-BCB5-92E35C49F613

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=BDC9564A-4091-4CDE-963A-239513DB6C17

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=DFF39BFE-0799-4912-AE22-392562178AE6

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=CF341A35-32EA-4FF7-ACA9-1A4683C100EE

Windows 7 for 32-bit Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=CF85CDB6-58C7-4144-82F6-F01A6A4F9C3A

Windows 7 for x64-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=0597018D-39F5-4CA9-B437-63D9E68F264D

Windows Server 2008 R2 for x64-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=28C832FB-4937-4652-8799-EAB6C76D05FB

Windows Server 2008 R2 for Itanium-based Systems:

http://www.microsoft.com/downloads/details.aspx?familyid=3AD64D5C-2D81-4AC8-934E-8917B2FCF961

A restart is required.

The Microsoft advisory is available at:

http://www.microsoft.com/technet/security/bulletin/ms10-092.mspx

Vendor URL:  www.microsoft.com/technet/security/bulletin/ms10-092.mspx (Links to External Site)
Cause:   Access control error

Message History:   None.


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