DESCRIPTION:
A high risk vulnerability (CVE-2022-26809) exists in the Winodws operation system. An attacker would send a specially crafted RPC(Remote Procedure Call) call to an RPC host. This could result in remote code execution on the server side with the same permissions as the RPC service.
AFFECTED RELEASES:
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 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for x64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 11 for ARM64-based Systems
Windows 11 for x64-based Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 8.1 for 32-bit systems
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based 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
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
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
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
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
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 (Server Core installation)
Windows Server 2012
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows Server 2022 (Server Core installation)
Windows Server, version 20H2 (Server Core Installation)
SOLUTION:
1. Users and system administrators of affected products are advised to apply the security updates by the following URL:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809
2. If you can’t update to the latest version, please refer the Microsoft official webpage and see the section ”Mitigations”.
(1) Close the port 445 of perimeter firewall
(2) See the following URL to protect SMB traffic:
https://docs.microsoft.com/zh-tw/windows-server/storage/file-server/smb-secure-traffic
REFERENCE:
1. https://www.ithome.com.tw/news/150440
2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809