发布日期：2021-12-14
更新日期：2021-12-15

受影响系统：

Microsoft Microsoft Windows 10 21H2 for x64-based Systems
Microsoft Microsoft Windows 10 21H2 for ARM64-based Systems
Microsoft Microsoft Windows 10 21H2 for 32-bit Systems
Microsoft Microsoft Windows 10 21H1 for x64-based Systems
Microsoft Microsoft Windows 10 21H1 for ARM64-based Systems
Microsoft Microsoft Windows 10 21H1 for 32-bit Systems
Microsoft Microsoft Windows 10 20H2 for x64-based Systems
Microsoft Microsoft Windows 10 20H2 for ARM64-based Systems
Microsoft Microsoft Windows 10 20H2 for 32-bit Systems
Microsoft Microsoft Windows 10 2004 for x64-based Systems
Microsoft Microsoft Windows 10 2004 for ARM64-based Systems
Microsoft Microsoft Windows 10 2004 for 32-bit Systems
Microsoft Microsoft Windows 11 for x64-based Systems
Microsoft Microsoft Windows 11 for ARM64-based Systems
Microsoft Microsoft Windows Server 20H2(Server Core Installation)
Microsoft Microsoft Windows Server 2022(Server Core installation)
Microsoft Microsoft Windows Server 2022
Microsoft Microsoft Windows Server 2004(Server Core installation)

描述：

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CVE(CAN) ID: CVE-2021-43239

Windows Recovery Environment是一组故障排除工具，可在Windows 10的高级启动选项下使用。
Microsoft Windows Recovery Environment Agent存在权限提升漏洞。攻击者可利用该漏洞提升权限。

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建议：

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厂商补丁：

Microsoft
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目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43239

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