Microsoft Windows Device Guard CVE-2017-11899 Remote Security Bypass Vulnerability

Risk:
High
Date Discovered:
December 12, 2017
Description:
Microsoft Windows is prone to a remote security-bypass vulnerability. An attacker can exploit this issue to bypass certain security restrictions and perform unauthorized actions. This may aid in further attacks.
Technologies Affected
  • Microsoft Windows 10 Version 1607 for 32-bit Systems
  • Microsoft Windows 10 Version 1607 for x64-based Systems
  • Microsoft Windows 10 for 32-bit Systems
  • Microsoft Windows 10 for x64-based Systems
  • Microsoft Windows 10 version 1511 for 32-bit Systems
  • Microsoft Windows 10 version 1511 for x64-based Systems
  • Microsoft Windows 10 version 1703 for 32-bit Systems
  • Microsoft Windows 10 version 1703 for x64-based Systems
  • Microsoft Windows 10 version 1709 for 32-bit Systems
  • Microsoft Windows 10 version 1709 for x64-based Systems
  • Microsoft Windows Server 2016
Recommendations
  • Block external access at the network boundary, unless external parties require service.
    If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.
  • Run all software as a nonprivileged user with minimal access rights.
    To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
  • Do not accept or execute files from untrusted or unknown sources.
    Users should be cautious when installing and running application from untrusted sources.
Updates are available. Please see the references or vendor advisory for more information.
References
Credits
James Forshaw of Google Project Zero
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