微軟Windows TCP/IP存在安全漏洞(CVE-2021-24074、CVE-2021-24094及CVE-2021-24086)，允許攻擊者遠端執行任意程式碼或造成服務阻斷，請儘速確認並進行更新

資安漏洞

內容說明：

研究人員發現微軟Windows TCP/IP存在安全漏洞 CVE-2021-24074、CVE-2021-24094及CVE-2021-24086，可能遭受以下攻擊：
1.    遠端攻擊者可發送特製封包，利用CVE-2021-24074或CVE-2021-24094執行任意程式碼。
2.    遠端攻擊者可發送特製封包，利用CVE-2021-24086造成服務阻斷。

 

目前已知影響平台如下：

受影響之Windows作業系統包含用戶端及伺服器版本，版本如下: 
Windows Server, version 20H2 (Server Core Installation)
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows Server, version 2004 (Server Core installation)
Windows 10 Version 2004 for x64-based Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows Server, version 1909 (Server Core installation)
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2
Windows Server 2012 (Server Core installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012
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 (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 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 for x64-based Systems Service Pack 2
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 (Server Core installation)
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows RT 8.1
Windows 8.1 for x64-based systems
Windows 8.1 for x64-based systems
Windows 8.1 for 32-bit systems
Windows 8.1 for 32-bit systems
Windows 7 for x64-based Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for 32-bit Systems Service Pack 1
Windows Server 2016  (Server Core installation)
Windows Server 2016
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Windows 10 for x64-based Systems
Windows 10 for 32-bit Systems
Windows Server 2019  (Server Core installation)
Windows Server 2019
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1803 for ARM64-based Systems
Windows 10 Version 1803 for x64-based Systems
Windows 10 Version 1803 for 32-bit Systems

 

建議措施：

1.目前微軟官方已針對此漏洞釋出更新程式，請各機關聯絡設備維護廠商或參考以下建議進行更新：
(1).https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24094
(2).https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24074
(3).https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24086

2.若無法立即更新，可參考官網公告採取緩解措施，並建議經測試再做調整
(1)CVE-2021-24074
執行官網因應措施中之PowerShell指令，停用IPv4之鬆散來源路由，防止攻擊者進行弱點利用，參考連結如下：
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24074
(2)CVE-2021-24086與CVE-2021-24094
執行官網因應措施中之PowerShell指令，於邊界網路設備上停用IPv6分段，防止攻擊者進行弱點利用，參考連結如下：
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24086
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24094
 

 

參考資料：

1. https://msrc-blog.microsoft.com/2021/02/09/multiple-security-updates-affecting-tcp-ip/
2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24094
3. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24074
4. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24086
5. https://unit42.paloaltonetworks.com/cve-2021-24074-patch-tuesday/
6. https://www.ithome.com.tw/news/142717