Windows Print Spooler权限提升漏洞(CVE-2021-1675)预警
一、 基本情况
6月9日，微软发布6月安全更新补丁，修复了50个安全漏洞，其中包括一个Windows Print Spooler权限提升漏洞，漏洞CVE编号：CVE-2021-1675。未经身份验证的远程攻击者可利用该漏洞以SYSTEM权限在域控制器上执行任意代码，从而获得整个域的控制权。建议受影响用户及时更新漏洞补丁进行防护，做好资产自查以及预防工作，以免遭受黑客攻击。
二、 漏洞描述
Print Spooler是Windows系统中用于管理打印相关事务的服务。
该漏洞在域环境中合适的条件下，无需任何用户交互，未经身份验证的远程攻击者就可以利用该漏洞以SYSTEM权限在域控制器上执行任意代码，从而获得整个域的控制权。
三、 影响范围
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, 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 10 Version 21H1 for 32-bit Systems
Windows 10 Version 21H1 for ARM64-based Systems
Windows 10 Version 21H1 for x64-based Systems
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 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
四、 安全建议
1. 官方建议：
目前官方已发布漏洞修复补丁，建议受影响用户尽快更新漏洞补丁。
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-1675
2. 临时防护措施：
若相关用户暂时无法进行补丁更新，可通过禁用Print Spooler服务来进行缓解：
1）在服务应用（services.msc）中找到Print Spooler服务。
2）停止运行服务，同时将“启动类型”修改为“禁用”。
五、参考链接
https://msrc.microsoft.com/update-guide/releaseNote/2021-Jun
http://blog.nsfocus.net/windows-print-spoolercve/
（来源：工业和信息化部网络安全威胁和漏洞信息共享平台 https://www.cstis.cn/post/9d92d107-db30-41e6-9706-b1a342e481ed）