一、漏洞概述
北京时间2月10日，微软发布2月安全更新补丁，修复了56个安全问题，涉及Microsoft Windows、Microsoft Office、Microsoft Exchange Server、Visual Studio、Microsoft .NET Framework等广泛使用的产品，其中包括远程代码执行和权限提升等高危漏洞类型。
本月微软月度更新修复的漏洞中，严重程度为关键（Critical）的漏洞有11个，重要（Important）漏洞有43个。请相关用户及时更新补丁进行防护，详细漏洞列表请参考附录。
参考链接：https://msrc.microsoft.com/update-guide/releaseNote/2021-Feb
二、重点漏洞简述
根据产品流行度和漏洞重要性筛选出此次更新中包含影响较大的漏洞，请相关用户重点进行关注：
Windows Installer权限提升漏洞（CVE-2021-1727）：
此漏洞为（CVE-2020-16902）的补丁绕过，拥有低权限的用户帐户的攻击者，利用此漏洞提升账户权限，从而目标主机控制权限，此前已有此漏洞的利用方式公开。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-1727
Windows Win32k权限提升漏洞（CVE-2021-1732）：
Windows内核模式驱动对内存对象处理不当导致的权限提升漏洞，经过身份验证的本地攻击者可利用此漏洞在目标系统上提升其权限以执行任意代码。目前已监测到在野利用。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-1732
Windows TCP/IP远程代码执行漏洞（CVE-2021-24074）：
Windows IPv4 协议栈中存在一个远程代码执行漏洞，远程攻击者通过构造特制的数据包，可在目标主机上远程执行任意代码。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24074
Windows DNS Server 远程代码执行漏洞（CVE-2021-24078）：
未经身份认证的攻击者通过向受影响的DNS服务器发送特制数据包，即可在目标系统上以本地系统账户权限执行任意代码。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24078
Windows TCP/IP拒绝服务漏洞（CVE-2021-24086）：
Windows IPv6协议栈存在一个拒绝服务漏洞，远程攻击者通过向受影响的主机发送特别构造的数据包，可导致目标系统拒绝服务。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24086
Windows TCP/IP远程代码执行漏洞（CVE-2021-24094）：
Windows IPv6协议栈存在一个远程代码执行漏洞，远程攻击者通过构造特制的数据包，可在目标主机上远程执行任意代码。
官方通告链接：https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24094
Windows控制台驱动程序拒绝服务漏洞（CVE-2021-24098）：
ConDrv.sys存在一个拒绝服务（DoS）漏洞，该漏洞会在Windows 10系统上触发蓝屏（BSOD）。攻击者通过诱使用户点击链接（通常是通过电子邮件或即时通讯消息的方式），然后打开特制文件触发此漏洞。前段时间利用方式已被大肆传播。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-24098
.NET Core远程执行代码漏洞（CVE-2021-26701）：
.NET Core 存在一个远程代码执行漏洞，远程攻击者可利用此漏洞获得目标主机控制权限，目前漏洞细节信息已公开。建议用户及开发者谨慎打开和使用 .NET 相关组件和应用程序。
官方通告链接：https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26701
三、影响范围
以下为重点关注漏洞的受影响产品版本，其他漏洞影响产品范围请参阅官方通告链接。
| 漏洞编号 | 受影响产品版本 |
| CVE-2021-1727 | 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, 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 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 |
| CVE-2021-1732 | 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 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 |
| CVE-2021-24078 | 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 2016 (Server Core installation) Windows Server 2016 Windows Server, version 20H2 (Server Core Installation) Windows Server, version 2004 (Server Core installation) Windows Server, version 1909 (Server Core installation) Windows Server 2019 (Server Core installation) Windows Server 2019 |
| CVE-2021-24074 CVE-2021-24086 CVE-2021-24094 | 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 |
| CVE-2021-24098 | 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 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 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 |
| CVE-2021-26701 | .NET 5.0 .NET Core 3.1 .NET Core 2.1 |
四、漏洞防护
4.1补丁更新
目前微软官方已针对受支持的产品版本发布了修复以上漏洞的安全补丁，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/releaseNote/2021-Feb
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。
附录：漏洞列表
| 影响产品 | CVE 编号 | 漏洞标题 | 严重程度 |
| Windows | CVE-2021-1722 | Windows Fax Service 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24093 | Windows Graphics Component 远程代码执行漏洞 | Critical |
| .NET Core,.NET | CVE-2021-24112 | .NET Core 远程代码执行漏洞 | Critical |
| .NET Core,.NET | CVE-2021-26701 | .NET Core 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24074 | Windows TCP/IP 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24077 | Windows Fax Service 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24078 | Windows DNS Server 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24081 | Microsoft Windows Codecs Library 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24088 | Windows Local Spooler 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24091 | Windows Camera Codec Pack 远程代码执行漏洞 | Critical |
| Windows | CVE-2021-24094 | Windows TCP/IP 远程代码执行漏洞 | Critical |
| Visual Studio Code,Microsoft Visual Studio | CVE-2021-1639 | Visual Studio Code 远程代码执行漏洞 | Important |
| Microsoft Visual Studio,.NET,.NET Core | CVE-2021-1721 | .NET Core and Visual Studio 拒绝服务漏洞 | Important |
| Microsoft Dynamics | CVE-2021-1724 | Microsoft Dynamics Business Central 跨站脚本漏洞 | Important |
| System Center | CVE-2021-1728 | System Center Operations Manager 权限提升漏洞 | Important |
| Windows | CVE-2021-1731 | PFX Encryption 安全功能绕过漏洞 | Important |
| Windows | CVE-2021-1732 | Windows Win32k 权限提升漏洞 | Important |
| PsExec | CVE-2021-1733 | Sysinternals PsExec 权限提升漏洞 | Important |
| Windows | CVE-2021-1734 | Windows Remote Procedure Call 信息披露漏洞 | Important |
| Windows | CVE-2021-1698 | Windows Win32k 权限提升漏洞 | Important |
| Windows | CVE-2021-25195 | Windows PKU2U 权限提升漏洞 | Important |
| Exchange Server | CVE-2021-24085 | Microsoft Exchange Server 欺骗漏洞 | Important |
| Azure | CVE-2021-24087 | Azure IoT CLI extension 权限提升漏洞 | Important |
| Windows | CVE-2021-24096 | Windows Kernel 权限提升漏洞 | Important |
| Microsoft Edge for Android | CVE-2021-24100 | Microsoft Edge for Android 信息披露漏洞 | Important |
| Microsoft Dynamics | CVE-2021-24101 | Microsoft Dataverse 信息披露漏洞 | Important |
| Visual Studio Code – npm-script Extension | CVE-2021-26700 | Visual Studio Code npm-script Extension 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24114 | Microsoft Teams iOS 信息披露漏洞 | Important |
| Microsoft Office | CVE-2021-1726 | Microsoft SharePoint 欺骗漏洞 | Important |
| Windows | CVE-2021-1727 | Windows Installer 权限提升漏洞 | Important |
| Exchange Server | CVE-2021-1730 | Microsoft Exchange Server 欺骗漏洞 | Important |
| Microsoft Office | CVE-2021-24066 | Microsoft SharePoint 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24067 | Microsoft Excel 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24068 | Microsoft Excel 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24069 | Microsoft Excel 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24070 | Microsoft Excel 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24071 | Microsoft SharePoint 信息披露漏洞 | Important |
| Microsoft Office | CVE-2021-24072 | Microsoft SharePoint Server 远程代码执行漏洞 | Important |
| Microsoft Office | CVE-2021-24073 | Skype for Business and Lync 欺骗漏洞 | Important |
| Windows | CVE-2021-24075 | Windows Network File System 拒绝服务漏洞 | Important |
| Windows | CVE-2021-24076 | Microsoft Windows VMSwitch 信息披露漏洞 | Important |
| Windows | CVE-2021-24079 | Windows Backup Engine 信息披露漏洞 | Important |
| Windows | CVE-2021-24082 | Microsoft.PowerShell.Utility Module WDAC 安全功能绕过漏洞 | Important |
| Windows | CVE-2021-24083 | Windows Address Book 远程代码执行漏洞 | Important |
| Windows | CVE-2021-24084 | Windows Mobile Device Management 信息披露漏洞 | Important |
| Windows | CVE-2021-24086 | Windows TCP/IP 拒绝服务漏洞 | Important |
| System Center | CVE-2021-24092 | Microsoft Defender 权限提升漏洞 | Important |
| Windows | CVE-2021-24098 | Windows Console Driver 拒绝服务漏洞 | Important |
| Microsoft Office | CVE-2021-24099 | Skype for Business and Lync 拒绝服务漏洞 | Important |
| Windows | CVE-2021-24102 | Windows Event Tracing 权限提升漏洞 | Important |
| Windows | CVE-2021-24103 | Windows Event Tracing 权限提升漏洞 | Important |
| Package Manager Configurations | CVE-2021-24105 | Package Managers Configurations 远程代码执行漏洞 | Important |
| Windows | CVE-2021-24106 | Windows DirectX 信息披露漏洞 | Important |
| Microsoft .NET Framework | CVE-2021-24111 | .NET Framework 拒绝服务漏洞 | Important |
| Windows | CVE-2021-24080 | Windows Trust Verification API 拒绝服务漏洞 | Moderate |
| Azure | CVE-2021-24109 | Microsoft Azure Kubernetes Service 权限提升漏洞 | Moderate |
声明
本安全公告仅用来描述可能存在的安全问题，绿盟科技不为此安全公告提供任何保证或承诺。由于传播、利用此安全公告所提供的信息而造成的任何直接或者间接的后果及损失，均由使用者本人负责，绿盟科技以及安全公告作者不为此承担任何责任。
绿盟科技拥有对此安全公告的修改和解释权。如欲转载或传播此安全公告，必须保证此安全公告的完整性，包括版权声明等全部内容。未经绿盟科技允许，不得任意修改或者增减此安全公告内容，不得以任何方式将其用于商业目的。