Overview
Recently, NSFOCUS CERT detected that the details of Windows LDAP remote code execution vulnerability (CVE-2024-49113) were disclosed. Due to an out-of-bounds read vulnerability in wldap32.dll of Windows LDAP service, an unauthenticated attacker can induce a target server (as an LDAP client) to initiate a query request to a malicious LDAP server controlled by the attacker through an unauthenticated special DCE/RPC call (or other means). A denial of service or information disclosure can result when a malicious LDAP server returns a specially-crafted, maliciously constructed response. The CVSS score is 7.5. At present, the vulnerability details and PoC have been made public. Relevant users are requested to take measures for protection as soon as possible.
NSFOCUS has successfully reproduced this vulnerability:
Reference link: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49113
Scope of Impact
- 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
Detection
Relevant users can determine whether the current system is at risk by viewing the system version and patch information.
1. Use Win+R to enter winver and press Enter to view the version number of current build system.
2. Open the Command Prompt window and run the systeminfo command to check information about patch installation.
Mitigation
At present, Microsoft has officially released a security patch to fix this vulnerability for the supported product versions. It is recommended that affected users install the patch as soon as possible for protection.
Download link: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49113
Note: Patch update of Windows Update may fail due to network problems, computer environment problems and other reasons. After installing the patch, users should check whether the patch is successfully updated in time.
Right click on the Windows icon, select “Settings (N)”, select “Updates and Security”-“Windows Updates” to view prompts on this page, or click “View Update History” to view historical updates.
For updates that have not been successfully installed, users can click the name of the update to jump to Microsoft’s official download page. It is recommended that users click on the link on this page to go to the “Microsoft Update Catalog” page to download and install the package.
Statement
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
About NSFOCUS
NSFOCUS, a pioneering leader in cybersecurity, is dedicated to safeguarding telecommunications, Internet service providers, hosting providers, and enterprises from sophisticated cyberattacks.
Founded in 2000, NSFOCUS operates globally with over 4000 employees at two headquarters in Beijing, China, and Santa Clara, CA, USA, and over 50 offices worldwide. It has a proven track record of protecting over 25% of the Fortune Global 500 companies, including four of the five largest banks and six of the world’s top ten telecommunications companies.
Leveraging technical prowess and innovation, NSFOCUS delivers a comprehensive suite of security solutions, including the Intelligent Security Operations Platform (ISOP) for modern SOC, DDoS Protection, Continuous Threat Exposure Management (CTEM) Service and Web Application and API Protection (WAAP). All the solutions and services are augmented by the Security Large Language Model (SecLLM), ML, patented algorithms and other cutting-edge research achievements developed by NSFOCUS.
