一、背景介绍
8月11日，市委网信办技术支撑单位监测到Microsoft发布的8月份安全更新，涉及多个高危漏洞（CVE-2021-34535、CVE-2021-36936、CVE-2021-36942、CVE-2021-36948）。
1.1部分漏洞详细介绍：
CVE-2021-34535远程桌面客户端远程代码执行漏洞
该漏洞影响RDP客户端，且需要用户交互，若受影响的RDP客户端连接攻击者控制的RDP服务器，成功利用该漏洞，攻击者可接管系统，获取用户权限。
CVE-2021-36936 Windows打印后台处理程序远程执行代码漏洞
Windows后台打印程序中存在一处已公开漏洞，允许低权的攻击者对受影响的系统进行攻击，成功利用该漏洞可造成远程代码执行。
CVE-2021-36942 Windows LSA欺骗漏洞
该漏洞允许未经授权的攻击者调用LSARPC接口上的方法，并强制域控制器使用NTLM哈希对其他域内机器进行身份验证。
CVE-2021-36948 Windows Update Medic服务特权提升漏洞
攻击者需要登录到受影响的系统运行精心编制的程序利用此漏洞，成功利用该漏洞可通过 Windows Update Medic服务升级本地权限，Windows Update Medic服务是Windows 10中引入的一项新功能，旨在修复损坏的Windows Update组件。
1.2漏洞编号
CVE-2021-34535
CVE-2021-36936
CVE-2021-36942
CVE-2021-36948
1.3漏洞等级
高危
2.1受影响版本
CVE-2021-34535
Windows Server 2019
Windows Server 2016
Windows Server 2012 R2
Windows Server 2012
Windows Server 2008 R2 for x64-based Systems Service Pack 1
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 10 for x64-based Systems
Windows 10 for 32-bit Systems
Windows 10 Version 21H1 for x64-based Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
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 10 Version 1909 for x64-based Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Remote Desktop client for Windows Desktop
CVE-2021-36936
Windows Server, version 20H2 (Server Core Installation)
Windows Server, version 2004 (Server Core installation)
Windows Server 2019 (Server Core installation)
Windows Server 2019
Windows Server 2016 (Server Core installation)
Windows Server 2016
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 (Server Core installation)
Windows Server 2012
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 (ServerCore installation)
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 R2 for x64-based Systems Service Pack 1
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 10 for x64-based Systems
Windows 10 for 32-bit Systems
Windows 10 Version 21H1 for x64-based Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
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 10 Version 1909 for x64-based Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
CVE-2021-36942
Windows Server, version 20H2 (Server Core Installation)
Windows Server, version 2004 (Server Core installation)
Windows Server 2019 (Server Core installation)
Windows Server 2019
Windows Server 2016 (Server Core installation)
Windows Server 2016
Windows Server 2012 R2 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 (Server Core installation)
Windows Server 2012
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 Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1
CVE-2021-36948
Windows Server, version 20H2 (Server Core Installation)
Windows Server, version 2004 (Server Core installation)
Windows Server 2019 (Server Core installation)
Windows Server 2019
Windows 10 Version 21H1 for x64-based Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows 10 Version 20H2 for ARM64-based Systems
Windows 10 Version 20H2 for 32-bit Systems
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 10 Version 1909 for x64-based Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for 32-bit Systems
2.2修复建议
通过 Windows系统自动更新补丁，并在“Windows更新”->“查看更新历史记录”中确认更新是否成功安装。
手动安装补丁包，参考链接：
https://msrc.microsoft.com/update-guide/releaseNote/2021-Aug