內容說明:
研究人員發現Microsoft Exchange Server存在安全漏洞(CVE-2021-26855、CVE-2021-26857、CVE-2021-26858及CVE-2021-27065),遠端攻擊者可利用這些弱點,透過與Exchange Server之443通訊埠建立連線並傳送特製封包而通過驗證,或者已具備Exchange Server登入帳號下,利用這些弱點寫入任意檔案,進而執行任意程式碼。
目前已知影響平台如下:
受影響之Exchange Server版本如下:
Microsoft Exchange Server 2013
Microsoft Exchange Server 2016
Microsoft Exchange Server 2019
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參考以下網址進行更新:
1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26855
2. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26857
3. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26858
4. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27065
參考資料:
1. https://www.ithome.com.tw/news/143001
2. https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
3. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26855
4. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26857
5. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26858
6. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27065