轉發教育機構資安通報應變小組

研究人員發現Windows作業系統與應用程式存在多個安全漏洞(CVE-2021-26443、38666、42292及42321)，遠端攻擊者可藉由漏洞進而執行任意程式碼。

情資分享等級: WHITE(情資內容為可公開揭露之資訊)

[影響平台:]

一、CVE-2021-26443：

● Windows 10 Version 1809 for x64-based Systems ● Windows 10 Version 1909 for x64-based Systems ● Windows 10 Version 2004 for x64-based Systems ● Windows 10 Version 20H2 for x64-based Systems ● Windows 10 Version 21H1 for x64-based Systems ● Windows 11 for x64-based Systems ● 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)

二、CVE-2021-38666：

● Remote Desktop client for Windows Desktop ● 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 11 for ARM64-based Systems ● Windows 11 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)

三、CVE-2021-42292：

● Microsoft 365 Apps for Enterprise for 32-bit Systems ● Microsoft 365 Apps for Enterprise for 64-bit Systems ● Microsoft Excel 2013 RT Service Pack 1 ● Microsoft Excel 2013 Service Pack 1 (32-bit editions) ● Microsoft Excel 2013 Service Pack 1 (64-bit editions) ● Microsoft Excel 2016 (32-bit edition) ● Microsoft Excel 2016 (64-bit edition) ● Microsoft Office 2013 RT Service Pack 1 ● Microsoft Office 2013 Service Pack 1 (32-bit editions) ● Microsoft Office 2013 Service Pack 1 (64-bit editions) ● Microsoft Office 2016 (32-bit edition) ● Microsoft Office 2016 (64-bit edition) ● Microsoft Office 2019 for 32-bit editions ● Microsoft Office 2019 for 64-bit editions ● Microsoft Office 2019 for Mac ● Microsoft Office LTSC 2021 for 32-bit editions ● Microsoft Office LTSC 2021 for 64-bit editions ● Microsoft Office LTSC for Mac 2021

四、CVE-2021-42321：

● Microsoft Exchange Server 2016 Cumulative Update 21 ● Microsoft Exchange Server 2016 Cumulative Update 22 ● Microsoft Exchange Server 2019 Cumulative Update 10 ● Microsoft Exchange Server 2019 Cumulative Update 11

[建議措施:]

目前微軟官方已針對這些漏洞釋出更新程式，請各機關聯絡維護廠商或參考以下網址進行更新：

1.https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26443

2.https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-38666

3.https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-42292

4.https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-42321

[參考資料:]

1. https://www.ithome.com.tw/news/147751

2. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26443

3. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-38666

4. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-42292

5. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-42321

(此通報僅在於告知相關資訊，並非為資安事件)，如果您對此通報的內容有疑問或有關於此事件的建議，歡迎與我們連絡。

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