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【修补方案】Windows打印后台处理程序曝高危漏洞
发布时间 :2021年06月30日
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漏洞描述

近日,亚信安全CERT监测到Github上有安全研究人员发布了Windows Print Spooler远程代码执行漏洞(编号:CVE-2021-1675)的EXP和漏洞详情分析,漏洞等级高危,CVSS评分7.8。该漏洞已于2021年6月8日由微软发布相关通告,并在6月9日推送的安全更新补丁中修复了该漏洞。


Windows Print Spooler是打印后台处理服务,负责与打印相关的事务。该服务被发现存在权限提升漏洞,经过身份认证的攻击者可利用此漏洞加载恶意DLL执行以获取权限。通常情况,客户端可以在经过身份验证的条件下,通过调用RpcAddPrinterDriver可以向打印服务添加驱动程序,但由于Spooler Service的常规安全检查中与身份验证相关的参数可控,导致普通用户可以绕过安全检查并添加驱动程序。在域中,普通域用户可以连接到 域控制器(DC)中的Spooler服务并在 域控制器(DC)中安装驱动程序。从而完全控制整个域。


鉴于,该漏洞危害较大,建议尽快安装补丁,或临时禁用Print Spooler服务。



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漏洞编号

CVE-2021-1675

漏洞等级

高危,CVSS评分 7.8

漏洞修复


  1. 下载官方发布的安全补丁

    目前微软官方已针对支持的系统版本发布了修复该漏洞的安全补丁,补丁地址:https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1675

  2. 临时修复建议

    禁用Print Spooler服务

受影响的版本


  • 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



参考链接:

1.https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1675

2.https://github.com/afwu/PrintNightmare

3.https://twitter.com/RedDrip7/status/1409353110187757575



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