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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Windows Device Guard Lets Local Users Bypass Trusted File Restrictions on the Target System
SecurityTracker Alert ID:  1041642
SecurityTracker URL:  http://securitytracker.com/id/1041642
CVE Reference:   CVE-2018-8449   (Links to External Site)
Date:  Sep 11 2018
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2016, 10, 10 Version 1607, 10 Version 1703, 10 Version 1709, 10 Version 1803
Description:   A vulnerability was reported in Microsoft Windows Device Guard. A local user can bypass trusted file restrictions on the target system.

A local user can cause an unsigned file appear to be a signed file, bypassing trusted file detection controls on the target system.

James Forshaw of Google Project Zero reported this vulnerability.

Impact:   A local user can cause an untrusted file to be detected as a trusted file.
Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8449
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457132
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457128
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457131
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457138
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4457142

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8449 (Links to External Site)
Cause:   Access control error

Message History:   None.


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