近日，国资国企安全响应中心（CASRC）监测发现GitHub上公开了Windows Print Spooler远程代码执行漏洞（CVE-2021-1675）的POC。Windows Print Spooler是Windows打印机后台处理程序，广泛的应用于各种内网中。该漏洞广泛存在于各Windows版本中，攻击者在一定条件下可利用该漏洞获得域控权限。鉴于相关漏洞危害程度较高，请用户核查自身Windows版本及Print Spooler服务开放情况，及时安全加固、修补漏洞，消除安全隐患。

      一、漏洞详情

      Windows Print Spooler远程代码执行漏洞（CVE-2021-1675）【严重】

      Windows Print Spooler是Windows打印机后台处理程序，攻击者可以通过该漏洞绕过安全验证，并在打印服务器中安装恶意的驱动程序。若攻击者所控制的用户在域中，则攻击者可以连接到域控服务器中的Spooler服务，并利用该漏洞在域控服务器中安装恶意的驱动程序，完整的控制整个域环境。

      二、影响范围

      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 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 Server, version 2004 (Server Core installation)
      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 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 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 10 Version 1809 for ARM64-based Systems
      Windows 10 Version 1809 for x64-based Systems
      Windows 10 Version 1809 for 32-bit Systems

      三、修复建议

      （一）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

      （二）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”。

      (国资国企安全响应中心（CASRC）作为收集用户及自身资产相关漏洞和威胁情报的窗口，是中资网安对外发布突发安全事件处置响应的平台，旨在充分利用全社会的白帽子资源及各安全公司技术优势，以平台为纽带共同服务于国资国企网络信息安全，打造健康、可信赖的互联网安全生态。)