Microsoft Windows Secure Boot Bug in Loading Boot Managers Lets Local Users
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SecurityTracker Alert ID: 1036573 |
SecurityTracker URL: http://securitytracker.com/id/1036573
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CVE Reference:
CVE-2016-3320
(Links to External Site)
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Date: Aug 9 2016
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Impact:
Execution of arbitrary code via local system, Root access via local system
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 8.1, RT 8.1, 2012 R2, 10, 10 Version 1511
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Description:
A vulnerability was reported in Microsoft Windows Secure Boot. A local user can bypass security restrictions.
A local administrative user or a physically local user can cause Windows Secure Boot to load a vulnerable boot manager and bypass Secure Boot Integrity Validation for BitLocker and Device Encryption security integrity checks. As a result, test-signed executable code and drivers can be loaded on the target system.
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Impact:
A local user can bypass security controls to load test-signed executable code and drivers on the target system.
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Solution:
The vendor has issued a fix.
Windows 8.1 for 32-bit Systems:
https://www.microsoft.com/downloads/details.aspx?familyid=19c5ba0d-de7b-41af-8db3-76d1ff6f79b2
Windows 8.1 for x64-based Systems:
https://www.microsoft.com/downloads/details.aspx?familyid=e0aedb91-f808-4ae8-86f4-46015f6b7c0b
Windows Server 2012:
https://www.microsoft.com/downloads/details.aspx?familyid=224b85dd-5caf-4c9f-852f-88f2542f9a94
Windows Server 2012 R2:
https://www.microsoft.com/downloads/details.aspx?familyid=14f74104-ff9e-4fe6-8bd0-2b749afb3171
Fixes are also available for Windows 10.
The Microsoft advisory is available at:
https://technet.microsoft.com/library/security/ms16-100
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Vendor URL: technet.microsoft.com/library/security/ms16-100 (Links to External Site)
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Cause:
Access control error
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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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