研究人員發現微軟Windows DNS伺服器因輸入驗證不足，導致存在安全漏洞(CVE-2021-24078)，遠端攻擊者可藉由發送特製封包，利用此漏洞進而執行任意程式碼。
使用下列Windows作業系統之伺服器如啟用DNS服務，將受此漏洞影響：
- 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, version 1909 (Server Core installation)
- Windows Server, version 2004 (Server Core installation)
- Windows Server, version 20H2 (Server Core Installation)
建議措施：
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
進行更新。
Windows TCP/IP存在安全漏洞
微軟Windows TCP/IP 也存在安全漏洞 CVE-2021-24074、CVE-2021-24094及CVE-2021-24086，可能遭受以下攻擊：
- 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。
- 遠端攻擊者可發送特製封包，利用CVE-2021-24086造成服務阻斷。
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：
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24094
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24074
- (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
- 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：https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24074
- 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
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
本文轉載自NCCST。