关于Windows LDAP拒绝服务漏洞(CVE-2024-49113)的安全预警
一、 基本情况
Windows Lightweight Directory Access Protocol (LDAP) 是一种基于 LDAP 协议的轻量级目录访问协议,广泛用于 Windows Active Directory (AD) 环境中,用来访问和管理目录服务信息。
二、 漏洞描述
Windows Lightweight Directory Access Protocol拒绝服务漏洞(CVE-2024-49113,CVSS评分7.5)的技术细节及PoC在互联网上公开。
Windows LDAP 服务的 wldap32.dll 中存在越界读取漏洞,攻击者可以通过未认证的特制DCE/RPC调用(或通过其他方式)诱使目标服务器(作为 LDAP 客户端)向攻击者控制的恶意 LDAP 服务器发起查询请求,当恶意服务器返回特制的、恶意构造的LDAP响应时,可能触发目标服务器中的越界读取漏洞,从而导致拒绝服务(引发 LSASS 服务崩溃,导致目标系统自动重启,造成服务中断)或信息泄露(导致内存中敏感信息,如凭据、会话数据被泄露)。
三、 影响范围
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
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
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 2025
Windows 11 Version 24H2 for x64-based Systems
Windows 11 Version 24H2 for ARM64-based Systems
Windows Server 2022, 23H2 Edition (Server Core installation)
Windows 11 Version 23H2 for x64-based Systems
Windows 11 Version 23H2 for ARM64-based Systems
Windows Server 2025 (Server Core installation)
Windows 10 Version 22H2 for 32-bit Systems
Windows 10 Version 22H2 for ARM64-based Systems
Windows 10 Version 22H2 for x64-based Systems
Windows 11 Version 22H2 for x64-based Systems
Windows 11 Version 22H2 for ARM64-based Systems
Windows 10 Version 21H2 for x64-based Systems
Windows 10 Version 21H2 for ARM64-based Systems
Windows 10 Version 21H2 for 32-bit Systems
Windows Server 2022 (Server Core installation)
Windows Server 2022
Windows Server 2019 (Server Core installation)
Windows Server 2019
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
四、 修复建议
目前微软已发布该漏洞的安全更新,受影响的用户可及时修复。
(一) Windows Update自动更新
Microsoft Update默认启用,当系统检测到可用更新时,将会自动下载更新并在下一次启动时安装。也可选择通过以下步骤手动进行更新:
1、点击“开始菜单”或按Windows快捷键,点击进入“设置”
2、选择“更新和安全”,进入“Windows更新”(Windows 8、Windows 8.1、Windows Server 2012以及Windows Server 2012 R2可通过控制面板进入“Windows更新”,具体步骤为“控制面板”->“系统和安全”->“Windows更新”)
3、选择“检查更新”,等待系统自动检查并下载可用更新。
4、更新完成后重启计算机,可通过进入“Windows更新”->“查看更新历史记录”查看是否成功安装了更新。对于没有成功安装的更新,可以点击该更新名称进入微软官方更新描述链接,点击最新的SSU名称并在新链接中点击“Microsoft 更新目录”,然后在新链接中选择适用于目标系统的补丁进行下载并安装。
(二) 手动安装更新
Microsoft官方下载相应补丁进行更新。
下载链接:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49113
五、 参考链接
https://www.safebreach.com/blog/ldapnightmare-safebreach-labs-publishes-first-proof-of-concept-exploit-for-cve-2024-49113/
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49113