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轉發 國家資安資訊分享與分析中心 資安訊息警訊 NISAC-ANA-202109-0479

研究人員發現微軟Windows內之瀏覽器排版引擎MSHTML存在安全漏洞(CVE-2021-40444)，

MSHTML用於微軟瀏覽器與Office應用程式中，攻擊者可誘騙使用者開啟含有惡意ActiveX之Office文件，進而載入瀏覽器引擎並瀏覽惡意網頁，利用此漏洞遠端執行任意程式碼。

[影響平台:]
● 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 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 2004 for 32-bit Systems 
● Windows 10 Version 2004 for ARM64-based Systems 
● Windows 10 Version 2004 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 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 (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 2004 (Server Core installation) 
● Windows Server, version 20H2 (Server Core Installation)
 

[建議措施:]

微軟預定於9月份安全性更新中釋出此漏洞之更新程式，請各機關聯絡設備維護廠商或參考以下建議措施：

1.避免開啟來路不明之Office文件。

2.部署政府組態基準(GCB)設定。

3.持續留意更新程式釋出進度，更新程式釋出前可參考微軟官方網頁(https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444)，評估是否採取緩解措施。

[參考資料:]

1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40444
2. https://www.ithome.com.tw/news/146584
3. https://docs.microsoft.com/zh-tw/microsoft-365/security/office-365-secur...