CVE-2024-38263 in Windows
Summary
by MITRE • 09/10/2024
Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 09/14/2024
This vulnerability exists within the Windows Remote Desktop Licensing service which operates as a critical component for managing remote desktop connections in enterprise environments. The flaw manifests as a remote code execution vulnerability that allows attackers to exploit weaknesses in how the licensing service processes incoming requests and validates input parameters. When a malicious actor sends specially crafted packets to the RDP licensing port typically listening on tcp 3389 or udp 1450, the service fails to properly validate the data structure leading to potential memory corruption and arbitrary code execution on the target system.
The technical implementation of this vulnerability stems from improper input validation within the licensing service's protocol handling mechanisms. Attackers can manipulate specific fields in the licensing protocol messages to trigger buffer overflows or pointer dereferences that result in code execution privileges equivalent to the local system account. This vulnerability aligns with CWE-121 Stack-based Buffer Overflow and CWE-787 Out-of-bounds Write classifications, representing a classic remote code execution vector that affects multiple Windows server versions including windows server 2012, 2016, 2019 and 2022. The attack surface extends beyond individual systems as the vulnerability can be leveraged to establish persistent access within networks where RDP services are exposed to untrusted networks.
The operational impact of this vulnerability presents significant risks to enterprise security postures particularly when organizations maintain exposed RDP endpoints without proper network segmentation or additional security controls. Attackers can exploit this vulnerability to gain unauthorized access to systems, escalate privileges, and potentially move laterally throughout the network infrastructure. The vulnerability operates at the network layer and requires minimal authentication to exploit, making it particularly dangerous for organizations that expose RDP services directly to internet facing firewalls without proper access controls or multi-factor authentication measures. This aligns with ATT&CK technique T1021.001 Remote Services: Remote Desktop Protocol which describes how adversaries can use legitimate remote access tools to establish persistent access.
Organizations should implement multiple layers of mitigation including immediate patching of affected systems through microsoft security updates, network segmentation to isolate RDP services from untrusted networks, implementation of strong authentication controls such as multi-factor authentication, and deployment of intrusion detection systems that monitor for suspicious RDP protocol traffic patterns. Additional protective measures include disabling unnecessary RDP services, implementing strict firewall rules limiting access to RDP ports, and conducting regular vulnerability assessments to identify exposed RDP endpoints. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and following defense-in-depth principles when managing remote access services in enterprise environments.