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※安全通報資訊

安全通報類型	微軟安全通報
發佈日期	2020-10-16
標題	【漏洞預警】微軟Windows TCP/IP堆疊存在安全漏洞(CVE-2020-16898)，允許攻擊者遠端執行任意程式碼，請儘速確認並進行更新！
CVE
BID
影響平台	[影響平台:] 受影響Windows版本如下: Windows 10 Version 1709 for 32-bit Systems; Windows 10 Version 1709 for ARM64-based Systems; Windows 10 Version 1709 for x64-based Systems; Windows 10 Version 1803 for 32-bit Systems; Windows 10 Version 1803 for ARM64-based Systems; Windows 10 Version 1803 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 1903 for 32-bit Systems; Windows 10 Version 1903 for ARM64-based Systems; Windows 10 Version 1903 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 Server 2019; Windows Server 2019 (Server Core installation); Windows Server, version 1903 (Server Core installation); Windows Server, version 1909 (Server Core installation); Windows Server, version 2004 (Server Core installation);
說明	轉發行政院國家資通安全會報技術服務中心資安訊息警訊 NISAC-ANA-202010-0502 研究人員發現微軟Windows TCP/IP堆疊(TCP/IP stack)未能正確處理ICMPv6之路由器公告(Router Advertisement)封包，導致存在安全漏洞(CVE-2020-16898)，遠端攻擊者可藉由發送特製的ICMPv6路由器公告封包，利用此漏洞進而執行任意程式碼。
解決方式	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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898 2.如無法更新，亦可於Windows 1709以上版本環境中，執行「netsh int ipv6 set int INTERFACENUMBER rabaseddnsconfig=disable」之PowerShell指令，藉由停用ICMPv6 RDNSS功能，防止攻擊者進行弱點利用。 [參考資料:] 1. https://portalmsrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898 2. https://vuldb.com/?id.162598
相關資訊連結	https://portalmsrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898
相關修正資訊連結	https://portalmsrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16898