一、 漏洞概述
2月10日,绿盟科技监测到微软在2月的补丁更新中修复了Windows TCP/IP远程代码执行漏洞(CVE-2021-24074),该漏洞位于IPv4源路由中,攻击者通过构造特殊的IP数据包,可远程在目标主机上执行任意代码。CVSS评分为9.8,影响系统广泛,请相关用户更新补丁进行防护。
参考链接:https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24074
二、影响范围
受影响版本
- 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 Server, version 1909 (Server Core installation)
- 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 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 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
- Windows 10 Version 1803 for ARM64-based Systems
- Windows 10 Version 1803 for x64-based Systems
- Windows 10 Version 1803 for 32-bit Systems
三、漏洞防护
3.1官方升级
目前微软官方已针对受支持的系统版本发布了修复该漏洞的安全补丁,强烈建议受影响用户尽快安装补丁进行防护,官方下载链接:
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24074
注:由于网络问题、计算机环境问题等原因,Windows Update的补丁更新可能出现失败。用户在安装补丁后,应及时检查补丁是否成功更新。
右键点击Windows图标,选择“设置(N)”,选择“更新和安全”-“Windows更新”,查看该页面上的提示信息,也可点击“查看更新历史记录”查看历史更新情况。
针对未成功安装的更新,可点击更新名称跳转到微软官方下载页面,建议用户点击该页面上的链接,转到“Microsoft更新目录”网站下载独立程序包并安装。
3.2临时防护措施
若相关用户暂时无法安装更新补丁,也可通过以下措施进行缓解:
1.使用以下命令,将sourceroutingbehavior设置为“ drop”
netsh int ipv4 set global sourceroutingbehavior=drop |
若想撤销此办法,还原默认设置,请运行以下命令:
netsh int ipv4 set global sourceroutingbehavior=dontforward |
2.配置防火墙或负载平衡器以禁止源路由请求
声明
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