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Security Advisory - January 12, 2021

Zscaler protects against 3 new vulnerabilities for Microsoft Defender, Microsoft SharePoint, and Microsoft Windows.

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 3 vulnerabilities included in the January 2021 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the January release and deploy additional protections, as necessary.

CVE-2021-1647 – Microsoft Defender Remote Code Execution Vulnerability

Severity: Critical

Affected Software

  • Microsoft System Center Endpoint Protection
  • Microsoft System Center 2012 R2 Endpoint Protection
  • Microsoft Security Essentials
  • Microsoft System Center 2012 Endpoint Protection
  • Windows Defender on Windows 10 Version 1803 for 32-bit Systems
  • Windows Defender on Windows 10 Version 1803 for x64-based Systems
  • Windows Defender on Windows 10 Version 1803 for ARM64-based Systems
  • Windows Defender on Windows 10 Version 1809 for 32-bit Systems
  • Windows Defender on Windows 10 Version 1809 for x64-based Systems
  • Windows Defender on Windows 10 Version 1809 for ARM64-based Systems
  • Windows Defender on Windows Server 2019
  • Windows Defender on Windows Server 2019 (Server Core installation)
  • Windows Defender on Windows 10 Version 1909 for 32-bit Systems
  • Windows Defender on Windows 10 Version 1909 for x64-based Systems
  • Windows Defender on Windows 10 Version 1909 for ARM64-based Systems
  • Windows Defender on Windows Server, version 1909 (Server Core installation)
  • Windows Defender on Windows 10 Version 1903 for 32-bit Systems
  • Windows Defender on Windows 10 Version 1903 for x64-based Systems
  • Windows Defender on Windows 10 Version 1903 for ARM64-based Systems
  • Windows Defender on Windows Server, version 1903 (Server Core installation)
  • Windows Defender on Windows 10 Version 2004 for 32-bit Systems
  • Windows Defender on Windows 10 Version 2004 for ARM64-based Systems
  • Windows Defender on Windows 10 Version 2004 for x64-based Systems
  • Windows Defender on Windows Server, version 2004 (Server Core installation)
  • Windows Defender on Windows 10 Version 20H2 for x64-based Systems
  • Windows Defender on Windows 10 Version 20H2 for 32-bit Systems
  • Windows Defender on Windows 10 Version 20H2 for ARM64-based Systems
  • Windows Defender on Windows Server, version 20H2 (Server Core Installation)
  • Windows Defender on Windows 10 for 32-bit Systems
  • Windows Defender on Windows 10 for x64-based Systems
  • Windows Defender on Windows 10 Version 1607 for 32-bit Systems
  • Windows Defender on Windows 10 Version 1607 for x64-based Systems
  • Windows Defender on Windows Server 2016
  • Windows Defender on Windows Server 2016 (Server Core installation)
  • Windows Defender on Windows 7 for 32-bit Systems Service Pack 1
  • Windows Defender on Windows 7 for x64-based Systems Service Pack 1
  • Windows Defender on Windows 8.1 for 32-bit systems
  • Windows Defender on Windows 8.1 for x64-based systems
  • Windows Defender on Windows RT 8.1
  • Windows Defender on Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Defender on Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Defender on Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Defender on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Defender on Windows Server 2012
  • Windows Defender on Windows Server 2012 (Server Core installation)
  • Windows Defender on Windows Server 2012 R2
  • Windows Defender on Windows Server 2012 R2 (Server Core installation)

CVE-2021-1707 – Microsoft SharePoint Server Remote Code Execution Vulnerability

Severity: Important

Affected Software

  • Microsoft SharePoint Enterprise Server 2016
  • Microsoft SharePoint Server 2019
  • Microsoft SharePoint Foundation 2010 Service Pack 2
  • Microsoft SharePoint Foundation 2013 Service Pack 1

CVE-2021-1709 – Windows Win32k Elevation of Privilege Vulnerability

Severity: Important

Affected Software

  • Windows 10 Version 20H2 for x64-based Systems
  • Windows 10 Version 20H2 for 32-bit Systems
  • Windows 10 Version 20H2 for ARM64-based Systems
  • Windows Server, version 20H2 (Server Core Installation)
  • Windows 10 Version 1803 for 32-bit Systems
  • Windows 10 Version 1803 for x64-based Systems
  • Windows 10 Version 1803 for ARM64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows Server, version 1909 (Server Core installation)
  • Windows 10 Version 1903 for 32-bit Systems
  • Windows 10 Version 1903 for x64-based Systems
  • Windows 10 Version 1903 for ARM64-based Systems
  • Windows Server, version 1903 (Server Core installation)
  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows Server, version 2004 (Server Core installation)
  • Windows 10 for 32-bit Systems
  • Windows 10 for x64-based Systems
  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows 7 for 32-bit Systems Service Pack 1
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows 8.1 for 32-bit systems
  • Windows 8.1 for x64-based systems
  • Windows RT 8.1
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)