CVE-2024-38131 in Windows
Summary
by MITRE • 08/13/2024
Clipboard Virtual Channel Extension Remote Code Execution Vulnerability
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 07/08/2025
The clipboard virtual channel extension vulnerability represents a critical security flaw in remote desktop protocols that enables unauthorized remote code execution through clipboard data manipulation. This vulnerability specifically affects the virtual channel implementation within remote desktop services where clipboard data is transmitted between client and server components. The flaw exists in how the system processes clipboard data within the virtual channel extension, creating an opportunity for malicious actors to inject arbitrary code that executes with the privileges of the target system. The vulnerability impacts Microsoft Windows operating systems and related remote desktop infrastructure components that utilize the clipboard virtual channel extension for data synchronization between remote desktop sessions.
The technical implementation of this vulnerability stems from insufficient input validation and memory handling within the clipboard virtual channel extension module. When remote desktop clients or servers process clipboard data through the virtual channel, the system fails to properly sanitize or validate the incoming data streams before processing them. This inadequate validation creates a buffer overflow condition or memory corruption scenario that adversaries can exploit by crafting malicious clipboard content that triggers the vulnerable code path. The vulnerability manifests when the system attempts to parse or render clipboard data that contains specially crafted malicious payloads designed to overwrite memory locations or manipulate execution flow within the virtual channel processing routines.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete system compromise and potential lateral movement within network environments. An attacker who successfully exploits this vulnerability gains the ability to execute arbitrary code on the target system with the same privileges as the remote desktop service account, which often runs with elevated privileges. This capability enables attackers to establish persistent access, escalate privileges further, and potentially pivot to other systems within the network. The vulnerability affects both client and server components of remote desktop infrastructure, making it particularly dangerous in enterprise environments where remote desktop services are extensively deployed. Organizations using remote desktop protocols for business continuity and remote work scenarios face significant risk from this vulnerability.
Mitigation strategies for this vulnerability require immediate patch management and network segmentation approaches to limit exposure. Microsoft has released security updates addressing this vulnerability through regular security patches, and administrators should prioritize deployment of these updates across all affected systems. Network segmentation and firewall rules should restrict access to remote desktop services to trusted networks only, while implementing additional authentication controls such as multi-factor authentication. The implementation of endpoint detection and response solutions can help identify exploitation attempts through anomalous clipboard data processing activities. Security monitoring should focus on detecting unusual clipboard data transfers, particularly those involving executable files or scripts. Organizations should also consider disabling unnecessary virtual channels and implementing strict access controls for remote desktop services to reduce the attack surface. This vulnerability aligns with CWE-121 and CWE-122 categories related to buffer overflow conditions and memory corruption issues, and maps to ATT&CK techniques including T1059 for execution and T1071 for application layer protocols.