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Security Advisory - November 10, 2020

Zscaler protects against 9 new vulnerabilities for Microsoft Windows.

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 9 vulnerabilities included in the November 2020 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the November release and deploy additional protections, as necessary.

CVE-2020-17061 – Microsoft SharePoint Remote Code Execution Vulnerability

Severity: Important

Affected Software

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

A remote code execution vulnerability exists in Microsoft SharePoint Service. An attacker who successfully exploited this vulnerability could gain the ability to execute code on the target server or client.

CVE-2020-17057 – Windows Win32k Elevation of Privilege Vulnerability

Severity: Important

Affected Software

  • Windows Server, version 1903 (Server Core installation)
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2016
  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1803 for x64-based Systems
  • Windows 10 Version 1803 for 32-bit 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 20H2 for x64-based Systems
  • Windows 10 Version 1607 for 32-bit Systems
  • Windows Server, version 2004 (Server Core installation)
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 1903 for ARM64-based Systems
  • Windows 10 Version 1903 for x64-based Systems
  • Windows 10 Version 1903 for 32-bit Systems
  • Windows Server, version 1909 (Server Core installation)
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2019
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1803 for ARM64-based Systems

An elevation of privilege vulnerability exists in Windows. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

CVE-2020-17051 – Windows Network File System Remote Code Execution Vulnerability

Severity: Critical

Affected Software

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

A remote code execution vulnerability exists in Windows Network File System. An attacker who successfully exploited this vulnerability could gain the ability to execute code on the target server or client.

CVE-2020-17053 – Internet Explorer Memory Corruption Vulnerability

Severity: Critical

Affected Software

  • Internet Explorer 11 on Windows 10 Version 1909 for x64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1909 for 32-bit Systems
  • Internet Explorer 11 on Windows Server 2019
  • Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems
  • Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems
  • Internet Explorer 11 on Windows 10 Version 20H2 for ARM64-based Systems
  • Internet Explorer 11 on Windows 10 Version 20H2 for x64-based Systems
  • Internet Explorer 11 on Windows 10 Version 20H2 for 32-bit Systems
  • Internet Explorer 11 on Windows 10 Version 2004 for x64-based Systems
  • Internet Explorer 11 on Windows 10 Version 2004 for ARM64-based Systems
  • Internet Explorer 11 on Windows 10 Version 2004 for 32-bit Systems
  • Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems
  • Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems
  • Internet Explorer 11 on Windows 10 Version 1909 for ARM64-based Systems

A memory corruption vulnerability exists in the way Internet Explorer handles objects in memory.

CVE-2020-17010 – Win32k Elevation of Privilege Vulnerability

Severity: Important

Affected Software

  • Windows Server, version 20H2 (Server Core Installation)
  • Windows Server, version 2004 (Server Core installation)
  • Windows Server, version 1909 (Server Core installation)
  • Windows Server, version 1903 (Server Core installation)
  • Windows 10 Version 20H2 for x64-based Systems
  • Windows 10 Version 20H2 for ARM64-based Systems
  • Windows 10 Version 20H2 for 32-bit Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows 10 Version 1903 for x64-based Systems
  • Windows 10 Version 1903 for ARM64-based Systems
  • Windows 10 Version 1903 for 32-bit Systems

An elevation of privilege vulnerability exists in Windows. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

CVE-2020-17038 – Win32k Elevation of Privilege Vulnerability

Severity: Critical

Affected Software

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

An elevation of privilege vulnerability exists in Windows. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

CVE-2020-16998 – DirectX Elevation of Privilege Vulnerability

Severity: Important

Affected Software

  • Windows Server, version 20H2 (Server Core Installation)
  • Windows Server, version 2004 (Server Core installation)
  • Windows Server, version 1909 (Server Core installation)
  • Windows Server, version 1903 (Server Core installation)
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2019
  • Windows Server 2016 (Server Core installation)
  • Windows Server 2016
  • Windows 10 for x64-based Systems
  • Windows 10 for 32-bit Systems
  • Windows 10 Version 20H2 for x64-based Systems
  • Windows 10 Version 20H2 for ARM64-based Systems
  • Windows 10 Version 20H2 for 32-bit Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows 10 Version 1903 for x64-based Systems
  • Windows 10 Version 1903 for ARM64-based Systems
  • Windows 10 Version 1903 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1803 for x64-based Systems
  • Windows 10 Version 1803 for ARM64-based Systems
  • Windows 10 Version 1803 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1607 for 32-bit Systems

An elevation of privilege vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

CVE-2020-17087 – Windows Kernel Local Elevation of Privilege Vulnerability

Severity: Important

Affected Software

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

An elevation of privilege vulnerability exists in Windows. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

CVE-2020-17047 – Windows Network File System Denial of Service Vulnerability

Severity: Important

Affected Software

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

A denial of service vulnerability exists when the Windows NFS server. An attacker who successfully exploited this vulnerability could cause the affected system to stop responding.