Consejos de seguridad de Zscaler

Aviso de seguridad - December 12, 2023

Zscaler protects against 4 new vulnerabilities for Windows

  1. Overview
  2. CVE-2023-35633 – Windows Kernel Elevation of Privilege Vulnerability
  3. CVE-2023-35644 – Windows Sysmain Service Elevation of Privilege
  4. CVE-2023-36005 – Windows Telephony Server Elevation of Privilege Vulnerability
  5. CVE-2023-36391 – Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

Zscaler, working with Microsoft through their MAPP program, has proactively deployed protection for the following 4 vulnerabilities included in the December 2023 Microsoft security bulletins. Zscaler will continue to monitor exploits associated with all vulnerabilities in the December release and deploy additional protections, as necessary.

CVE-2023-35633 – Windows Kernel Elevation of Privilege Vulnerability

Severity: Important

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 10 for x64-based Systems
  • Windows 10 for 32-bit Systems

CVE-2023-35644 – Windows Sysmain Service Elevation of Privilege

Severity: Important

Affected Software

  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows 11 Version 23H2 for x64based Systems
  • Windows 11 Version 23H2 for ARM64based Systems
  • Windows 10 Version 22H2 for 32bit Systems
  • Windows 10 Version 22H2 for ARM64based Systems
  • Windows 10 Version 22H2 for x64based Systems
  • Windows 11 Version 22H2 for x64based Systems
  • Windows 11 Version 22H2 for ARM64based Systems
  • Windows 10 Version 21H2 for x64based Systems
  • Windows 10 Version 21H2 for ARM64based Systems
  • Windows 10 Version 21H2 for 32bit Systems
  • Windows 11 version 21H2 for ARM64based Systems
  • Windows 11 version 21H2 for x64based Systems
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2019 (Server Core installation)
  • 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-2023-36005 – Windows Telephony Server Elevation of Privilege Vulnerability

Severity: Important

Affected Software

  • Windows 10 for x64based Systems
  • Windows 10 for 32bit Systems
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows 11 Version 23H2 for x64based Systems
  • Windows 11 Version 23H2 for ARM64based Systems
  • Windows 10 Version 22H2 for 32bit Systems
  • Windows 10 Version 22H2 for ARM64based Systems
  • Windows 10 Version 22H2 for x64based Systems
  • Windows 11 Version 22H2 for x64based Systems
  • Windows 11 Version 22H2 for ARM64based Systems
  • Windows 10 Version 21H2 for x64based Systems
  • Windows 10 Version 21H2 for ARM64based Systems
  • Windows 10 Version 21H2 for 32bit Systems
  • Windows 11 version 21H2 for ARM64based Systems
  • Windows 11 version 21H2 for x64based Systems
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2019 (Server Core installation)
  • 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-2023-36391 – Local Security Authority Subsystem Service Elevation of Privilege Vulnerability

Severity: Important

Affected Software

  • Windows 11 Version 23H2 for x64based Systems
  • Windows 11 Version 23H2 for ARM64based Systems