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[內容說明:]
轉發 國家資安資訊分享與分析中心 NISAC-ANA-202204-0651

研究人員發現Windows作業系統存在高風險安全漏洞(CVE-2022-26809)，攻擊者可將特別製作之遠端程序呼叫(Remote Procedure Call，

簡稱RPC)傳送至RPC主機，即可獲得與RPC服務相同之權限，進而於伺服器上遠端執行任意程式碼。

[影響平台:]
受影響版本如下： 
● 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 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 
● 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)

[建議措施:]
1.目前微軟官方已針對此漏洞釋出更新程式，請各機關聯絡維護廠商或參考下列網址進行更新：https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809

2.若無法更新若無法更新至最新版本，請參考微軟官方網頁之「Mitigations」一節，採取下列緩解措施：

(1)關閉邊界防火牆的TCP 445埠。

(2)參考下列官方指引保護SMB流量：https://docs.microsoft.com/zh-tw/windows-server/storage/file-server/smb-...

[參考資料:]
1. https://www.ithome.com.tw/news/150440 
2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26809