我司在安全漏洞预警机制排查时发现，Microsoft官方于2021年1月12日发布了Microsoft Defender 缓冲区溢出漏洞的风险通告，该漏洞编号为CVE-2021-1647，漏洞等级：高危，漏洞评分：7.8，特将漏洞详情通告如下：

一、漏洞详情

攻击者通过构造特殊的PE文件,使得Microsoft Defender在对该文件进行解析的时候，产生缓冲区溢出，从而造成远程代码执行。目前，漏洞细节已公开，Microsoft官方已发布升级版本信息。

二、影响版本

-Microsoft:Microsoft Defender:Windows 8.1 for 32-bit systems

-Microsoft:Microsoft Defender:Windows 7 for x64-based Systems Service Pack 1

-Microsoft:Microsoft Defender:Windows 7 for 32-bit Systems Service Pack 1

-Microsoft:Microsoft Defender:Windows Server 2016 (Server Core installation)

-Microsoft:Microsoft Defender:Windows Server 2016

-Microsoft:Microsoft Defender:Windows 10 Version 1607 for x64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1607 for 32-bit Systems

-Microsoft:Microsoft Defender:Windows 10 for x64-based Systems

-Microsoft:Microsoft Defender:Windows 10 for 32-bit Systems

-Microsoft:Microsoft Defender:Windows Server, version 20H2 (Server Core Installation)

-Microsoft:Microsoft Defender:Windows 10 Version 20H2 for ARM64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 20H2 for 32-bit Systems

-Microsoft:Microsoft Defender:Windows 10 Version 20H2 for x64-based Systems

-Microsoft:Microsoft Defender:Windows Server, version 2004 (Server Core installation)

-Microsoft:Microsoft Defender:Windows 10 Version 2004 for x64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 2004 for ARM64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 2004 for 32-bit Systems

-Microsoft:Microsoft Defender:Windows Server, version 1909 (Server Core installation)

-Microsoft:Microsoft Defender:Windows 10 Version 1909 for ARM64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1909 for x64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1909 for 32-bit Systems

-Microsoft:Microsoft Defender:Windows Server 2019 (Server Core installation)

-Microsoft:Microsoft Defender:Windows Server 2019

-Microsoft:Microsoft Defender:Windows 10 Version 1809 for ARM64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1809 for x64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1809 for 32-bit Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1803 for ARM64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1803 for x64-based Systems

-Microsoft:Microsoft Defender:Windows 10 Version 1803 for 32-bit Systems

-Microsoft:Microsoft System Center 2012 Endpoint Protection

-Microsoft:Microsoft Security Essentials

-Microsoft:Microsoft System Center 2012 R2 Endpoint Protection

-Microsoft:Microsoft System Center Endpoint Protection

-Microsoft:Microsoft Defender:Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)

-Microsoft:Microsoft Defender:Windows Server 2008 for 32-bit Systems Service Pack 2

-Microsoft:Microsoft Defender:Windows RT 8.1

-Microsoft:Microsoft Defender:Windows 8.1 for x64-based systems

-Microsoft:Microsoft Defender:Windows Server 2012 R2 (Server Core installation)

-Microsoft:Microsoft Defender:Windows Server 2012 R2

-Microsoft:Microsoft Defender:Windows Server 2012 (Server Core installation)

三、修复建议

微软官方已更新受影响软件的安全补丁，用户可根据不同版本系统下载安装对应的安全补丁，安全更新链接如下：https://www.landui.com/update-guide/en-us/vulnerability/CVE-2021-1647

四、高危风险重要提醒

1. 请您及时进行Microsoft Windows版本检查、更新；

2. 请您保持Windows server / Windows 检测并开启自动更新功能；Windows自动更新流程如下：

1) 点击开始菜单，在弹出的菜单中选择“控制面板”进行下一步。

2) 点击控制面板页面中的“系统和安全”，进入设置。

3) 在弹出的新的界面中选择“windows update”中的“启用或禁用自动更新”。

4) 然后进入设置窗口，展开下拉菜单项，选择其中的自动安装更新（推荐）。

3. 请您在安全管理中养成数据备份的好习惯，做好数据备份工作，避免因数据丢失给您带来的损失。

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