Security Advisory - August 10, 2021

Zscaler protects against 2 new vulnerabilities for Microsoft Windows

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 2 vulnerabilities included in the August 2021 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the August release and deploy additional protections, as necessary.

 

CVE-2021-34480 – Scripting Engine Memory Corruption Vulnerability

Severity: Critical

Affected Software

  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows Server 2008 R2 for x64based Systems Service Pack 1
  • Windows RT 8.1
  • Windows 8.1 for x64based systems
  • Windows 8.1 for 32bit systems
  • Windows 7 for x64based Systems Service Pack 1
  • Windows 7 for 32bit Systems Service Pack 1
  • Windows Server 2016
  • Windows 10 Version 1607 for x64based Systems
  • Windows 10 Version 1607 for 32bit Systems
  • Windows 10 for x64based Systems
  • Windows 10 for 32bit Systems
  • Windows 10 Version 20H2 for ARM64based Systems
  • Windows 10 Version 20H2 for 32bit Systems
  • Windows 10 Version 20H2 for x64based Systems
  • Windows 10 Version 2004 for x64based Systems
  • Windows 10 Version 2004 for ARM64based Systems
  • Windows 10 Version 2004 for 32bit Systems
  • Windows 10 Version 21H1 for 32bit Systems
  • Windows 10 Version 21H1 for ARM64based Systems
  • Windows 10 Version 21H1 for x64based Systems
  • Windows 10 Version 1909 for ARM64based Systems
  • Windows 10 Version 1909 for x64based Systems
  • Windows 10 Version 1909 for 32bit Systems
  • Windows Server 2019
  • Windows 10 Version 1809 for ARM64based Systems
  • Windows 10 Version 1809 for x64based Systems
  • Windows 10 Version 1809 for 32bit Systems

 

CVE-2021-34535 – Remote Desktop Client Remote Code Execution Vulnerability

Severity: Critical

Affected Software

  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows Server 2008 R2 for x64based Systems Service Pack 1
  • Windows RT 8.1
  • Windows 8.1 for x64based systems
  • Windows 8.1 for 32bit systems
  • Windows 7 for x64based Systems Service Pack 1
  • Windows 7 for 32bit Systems Service Pack 1
  • Windows Server 2016
  • Windows 10 Version 1607 for x64based Systems
  • Windows 10 Version 1607 for 32bit Systems
  • Windows 10 for x64based Systems
  • Windows 10 for 32bit Systems
  • Windows 10 Version 20H2 for ARM64based Systems
  • Windows 10 Version 20H2 for 32bit Systems
  • Windows 10 Version 20H2 for x64based Systems
  • Windows 10 Version 2004 for x64based Systems
  • Windows 10 Version 2004 for ARM64based Systems
  • Windows 10 Version 2004 for 32bit Systems
  • Windows 10 Version 21H1 for 32bit Systems
  • Windows 10 Version 21H1 for ARM64based Systems
  • Windows 10 Version 21H1 for x64based Systems
  • Remote Desktop client for Windows Desktop
  • Windows 10 Version 1909 for ARM64based Systems
  • Windows 10 Version 1909 for x64based Systems
  • Windows 10 Version 1909 for 32bit Systems
  • Windows Server 2019
  • Windows 10 Version 1809 for ARM64based Systems
  • Windows 10 Version 1809 for x64based Systems
  • Windows 10 Version 1809 for 32bit Systems