对于普通用户来说，本月补丁星期二活动发布的 Windows 10 累积更新并没有什么新的内容，主要是对系统安全性进行优化。不过对于 Windows 和 Microsoft Exchange 管理员来说，最近几个月一直非常忙碌，4 月累积更新修复了 5 个零日漏洞和更多的 Exchange 漏洞。
在今天的更新中，微软共计修复了 108 处漏洞，其中 19 个标记为“关键漏洞”（Critial），89 个标记为“重要漏洞”（Important）。而且这些漏洞并不包含本月初发布的 6 个 Chromium Edge 漏洞。
此外，今天微软还修复了 5 个公开披露的零日漏洞，其中 1 个已知用于网络攻击。更糟糕的是，微软修复了 NSA 发现的 4 个关键的 Microsoft Exchange 漏洞。作为今天补丁星期二的一部分，微软已经修复了 4 个公开披露的漏洞和一个主动利用的漏洞。
以下 4 个漏洞微软表示已经公开暴露，但没有证据表明被黑客利用。
CVE-2021-27091 - RPC端点映射器服务权限提升的漏洞
CVE-2021-28312 - Windows NTFS 拒绝服务漏洞
CVE-2021-28437 - Windows 安装程序信息泄露漏洞 - PolarBear
CVE-2021-28458 - Azure ms-rest-nodeauth 库的权限提升漏洞
卡巴斯基研究人员 Boris Larin 发现的以下漏洞已经被黑客组织 BITTER APT 利用。
CVE-2021-28310 - Win32k 提升权限漏洞
卡巴斯基在博文中解释道：“不幸的是，我们无法捕捉到一个完整的链条，所以我们不知道该漏洞是否与另一个浏览器零日配合使用，或者与已知的、打过补丁的漏洞结合在一起使用”。
微软 Exchange 的管理员们并没有得到任何休息，因为今天又有 4 个 NSA 发现的关键远程代码执行漏洞在微软 Exchange 中得到了修复。其中两个漏洞是预认证，这意味着它们不需要攻击者先登录服务器。
CVE-2021-28480--微软Exchange服务器远程代码执行漏洞
CVE-2021-28481 - 微软Exchange服务器远程代码执行漏洞
CVE-2021-28482 - 微软Exchange服务器远程代码执行漏洞
CVE-2021-28483 - 微软Exchange服务器远程代码执行漏洞
完整报告如下
| Tag | CVE ID | CVE Title | Severity |
|---|---|---|---|
| Azure AD Web Sign-in | Azure AD Web Sign-in Security Feature Bypass Vulnerability | Important | |
| Azure DevOps | Azure DevOps Server Spoofing Vulnerability | Important | |
| Azure DevOps | Azure DevOps Server and Team Foundation Server Information Disclosure Vulnerability | Important | |
| Azure Sphere | Azure Sphere Unsigned Code Execution Vulnerability | Critical | |
| Microsoft Edge (Chromium-based) | Chromium: CVE-2021-21199 Use Use after free in Aura | Unknown | |
| Microsoft Edge (Chromium-based) | Chromium: CVE-2021-21194 Use after free in screen capture | Unknown | |
| Microsoft Edge (Chromium-based) | Chromium: CVE-2021-21197 Heap buffer overflow in TabStrip | Unknown | |
| Microsoft Edge (Chromium-based) | Chromium: CVE-2021-21198 Out of bounds read in IPC | Unknown | |
| Microsoft Edge (Chromium-based) | Chromium: CVE-2021-21195 Use after free in V8 | Unknown | |
| Microsoft Edge (Chromium-based) | Chromium: CVE-2021-21196 Heap buffer overflow in TabStrip | Unknown | |
| Microsoft Exchange Server | Microsoft Exchange Server Remote Code Execution Vulnerability | Critical | |
| Microsoft Exchange Server | Microsoft Exchange Server Remote Code Execution Vulnerability | Critical | |
| Microsoft Exchange Server | Microsoft Exchange Server Remote Code Execution Vulnerability | Critical | |
| Microsoft Exchange Server | Microsoft Exchange Server Remote Code Execution Vulnerability | Critical | |
| Microsoft Graphics Component | Windows GDI+ Remote Code Execution Vulnerability | Important | |
| Microsoft Graphics Component | Windows GDI+ Information Disclosure Vulnerability | Important | |
| Microsoft Graphics Component | Windows GDI+ Remote Code Execution Vulnerability | Important | |
| Microsoft Graphics Component | Windows GDI+ Remote Code Execution Vulnerability | Important | |
| Microsoft Internet Messaging API | Microsoft Internet Messaging API Remote Code Execution Vulnerability | Important | |
| Microsoft NTFS | Windows NTFS Denial of Service Vulnerability | Moderate | |
| Microsoft NTFS | NTFS Elevation of Privilege Vulnerability | Important | |
| Microsoft Office Excel | Microsoft Excel Information Disclosure Vulnerability | Important | |
| Microsoft Office Excel | Microsoft Excel Remote Code Execution Vulnerability | Important | |
| Microsoft Office Excel | Microsoft Excel Remote Code Execution Vulnerability | Important | |
| Microsoft Office Excel | Microsoft Office Remote Code Execution Vulnerability | Important | |
| Microsoft Office Outlook | Microsoft Outlook Memory Corruption Vulnerability | Important | |
| Microsoft Office SharePoint | Microsoft SharePoint Denial of Service Update | Important | |
| Microsoft Office Word | Microsoft Word Remote Code Execution Vulnerability | Important | |
| Microsoft Windows Codecs Library | VP9 Video Extensions Remote Code Execution Vulnerability | Important | |
| Microsoft Windows Codecs Library | Raw Image Extension Remote Code Execution Vulnerability | Important | |
| Microsoft Windows Codecs Library | Windows Media Photo Codec Information Disclosure Vulnerability | Important | |
| Microsoft Windows Codecs Library | Raw Image Extension Remote Code Execution Vulnerability | Important | |
| Microsoft Windows Codecs Library | Microsoft Windows Codecs Library Information Disclosure Vulnerability | Important | |
| Microsoft Windows DNS | Windows DNS Information Disclosure Vulnerability | Important | |
| Microsoft Windows DNS | Windows DNS Information Disclosure Vulnerability | Important | |
| Microsoft Windows Speech | Windows Speech Runtime Elevation of Privilege Vulnerability | Important | |
| Microsoft Windows Speech | Windows Speech Runtime Elevation of Privilege Vulnerability | Important | |
| Microsoft Windows Speech | Windows Speech Runtime Elevation of Privilege Vulnerability | Important | |
| Open Source Software | Azure ms-rest-nodeauth Library Elevation of Privilege Vulnerability | Important | |
| Role: Hyper-V | Windows Hyper-V Information Disclosure Vulnerability | Important | |
| Role: Hyper-V | Windows Hyper-V Elevation of Privilege Vulnerability | Important | |
| Role: Hyper-V | Windows Hyper-V Security Feature Bypass Vulnerability | Important | |
| Role: Hyper-V | Windows Hyper-V Denial of Service Vulnerability | Important | |
| Visual Studio | Visual Studio Installer Elevation of Privilege Vulnerability | Important | |
| Visual Studio Code | Visual Studio Code Remote Code Execution Vulnerability | Important | |
| Visual Studio Code | Remote Development Extension for Visual Studio Code Remote Code Execution Vulnerability | Important | |
| Visual Studio Code | Visual Studio Code Remote Code Execution Vulnerability | Important | |
| Visual Studio Code | Visual Studio Code Remote Code Execution Vulnerability | Important | |
| Visual Studio Code | Visual Studio Code Remote Code Execution Vulnerability | Important | |
| Visual Studio Code | Visual Studio Code Remote Code Execution Vulnerability | Important | |
| Visual Studio Code - GitHub Pull Requests and Issues Extension | Visual Studio Code GitHub Pull Requests and Issues Extension Remote Code Execution Vulnerability | Important | |
| Visual Studio Code - Kubernetes Tools | Visual Studio Code Kubernetes Tools Remote Code Execution Vulnerability | Important | |
| Visual Studio Code - Maven for Java Extension | Visual Studio Code Maven for Java Extension Remote Code Execution Vulnerability | Important | |
| Windows Application Compatibility Cache | Windows Application Compatibility Cache Denial of Service Vulnerability | Important | |
| Windows AppX Deployment Extensions | Windows AppX Deployment Server Denial of Service Vulnerability | Important | |
| Windows Console Driver | Windows Console Driver Denial of Service Vulnerability | Important | |
| Windows Console Driver | Windows Console Driver Denial of Service Vulnerability | Important | |
| Windows Diagnostic Hub | Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability | Important | |
| Windows Diagnostic Hub | Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability | Important | |
| Windows Diagnostic Hub | Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability | Important | |
| Windows Early Launch Antimalware Driver | Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability | Important | |
| Windows ELAM | Windows Early Launch Antimalware Driver Security Feature Bypass Vulnerability | Important | |
| Windows Event Tracing | Windows Event Tracing Elevation of Privilege Vulnerability | Important | |
| Windows Event Tracing | Windows Event Tracing Information Disclosure Vulnerability | Important | |
| Windows Installer | Windows Installer Spoofing Vulnerability | Important | |
| Windows Installer | Windows Installer Elevation of Privilege Vulnerability | Important | |
| Windows Installer | Windows Installer Information Disclosure Vulnerability | Important | |
| Windows Installer | Windows Installer Elevation of Privilege Vulnerability | Important | |
| Windows Kernel | Windows Kernel Information Disclosure Vulnerability | Important | |
| Windows Kernel | Windows Kernel Information Disclosure Vulnerability | Important | |
| Windows Media Player | Windows Media Video Decoder Remote Code Execution Vulnerability | Critical | |
| Windows Media Player | Windows Media Video Decoder Remote Code Execution Vulnerability | Critical | |
| Windows Network File System | Windows Network File System Remote Code Execution Vulnerability | Important | |
| Windows Overlay Filter | Windows Overlay Filter Information Disclosure Vulnerability | Important | |
| Windows Portmapping | Windows Portmapping Information Disclosure Vulnerability | Important | |
| Windows Registry | RPC Endpoint Mapper Service Elevation of Privilege Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Important | |
| Windows Remote Procedure Call Runtime | Remote Procedure Call Runtime Remote Code Execution Vulnerability | Critical | |
| Windows Resource Manager | Windows Resource Manager PSM Service Extension Elevation of Privilege Vulnerability | Important | |
| Windows Secure Kernel Mode | Windows Secure Kernel Mode Elevation of Privilege Vulnerability | Important | |
| Windows Services and Controller App | Windows Services and Controller App Elevation of Privilege Vulnerability | Important | |
| Windows SMB Server | Windows SMB Information Disclosure Vulnerability | Important | |
| Windows SMB Server | Windows SMB Information Disclosure Vulnerability | Important | |
| Windows TCP/IP | Windows TCP/IP Driver Denial of Service Vulnerability | Important | |
| Windows TCP/IP | Windows TCP/IP Information Disclosure Vulnerability | Important | |
| Windows TCP/IP | Windows TCP/IP Driver Denial of Service Vulnerability | Important | |
| Windows Win32K | Win32k Elevation of Privilege Vulnerability | Important | |
| Windows Win32K | Win32k Elevation of Privilege Vulnerability | Important | |
| Windows WLAN Auto Config Service | Windows WLAN AutoConfig Service Security Feature Bypass Vulnerability | Important |