【ANA】【漏洞預警】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!

發佈編號

TACERT-ANA-2021021810023838

發佈時間

2021-02-18 10:08:39

事故類型

ANA-漏洞預警

發現時間

2021-02-18 10:08:39

影響等級

   

[主旨說明:]【漏洞預警】微軟Windows TCP/IP存在安全漏洞(CVE-2021-24074CVE-2021-24094CVE-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!

[內容說明:]

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-202102-0902

 

研究人員發現微軟Windows TCP/IP存在安全漏洞 CVE-2021-24074CVE-2021-24094CVE-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-2021-24074CVE-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。

 

情資分享等級: WHITE(情資內容為可公開揭露之資訊)

[影響平台:]

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

Windows Server 2012 (Server Core installation)

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

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 32-bit Systems Service Pack 2 (Server Core installation)

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 32-bit systems

Windows 7 for x64-based 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-2021-24086CVE-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-2021-24086https://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