CVE-2025-0501 in WorkSpaces Client
Summary
by MITRE • 01/15/2025
An issue in the native clients for Amazon WorkSpaces Clients when running PCoIP protocol may allow an attacker to access remote sessions via man-in-the-middle.
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Analysis
by VulDB Data Team • 10/15/2025
The vulnerability identified as CVE-2025-0501 affects the native clients for Amazon WorkSpaces, specifically when operating under the PCoIP protocol implementation. This issue represents a significant security weakness that could potentially compromise the integrity and confidentiality of remote desktop sessions. The PCoIP protocol, developed by Teradici, is designed to provide secure remote access to desktop environments, making the existence of such a vulnerability particularly concerning for organizations relying on virtual desktop infrastructure solutions.
The technical flaw manifests in the client-side implementation of the PCoIP protocol within Amazon WorkSpaces native clients, where insufficient validation of server certificates or improper handling of cryptographic negotiations creates an opportunity for malicious actors to intercept and manipulate session data. This vulnerability stems from inadequate certificate verification mechanisms that fail to properly authenticate the legitimacy of the remote WorkSpaces server, allowing attackers to present forged certificates that appear valid to the client software. The weakness aligns with CWE-295 which specifically addresses improper certificate validation and certificate pinning failures in cryptographic implementations. Attackers can exploit this by positioning themselves between the client and server to perform man-in-the-middle attacks, potentially gaining unauthorized access to sensitive session data including user credentials, session content, and potentially full system control.
The operational impact of this vulnerability extends beyond simple data interception, as successful exploitation could enable attackers to gain access to confidential corporate information, user accounts, and potentially escalate privileges within the remote desktop environment. Organizations utilizing Amazon WorkSpaces for remote work solutions face heightened risk since the vulnerability affects the fundamental security model of the platform. The attack vector requires the adversary to be positioned within the network path between the client and server, typically through network interception techniques such as ARP spoofing, DNS poisoning, or other network-level man-in-the-middle approaches. This vulnerability particularly impacts enterprises that rely on remote desktop infrastructure for business continuity, as it undermines the core security assumptions of the virtual desktop environment and could lead to significant data breaches and compliance violations.
Organizations should immediately implement mitigations including updating to patched versions of Amazon WorkSpaces clients, implementing additional network security controls such as IPsec or SSL/TLS inspection, and considering the deployment of network segmentation strategies to limit the attack surface. The mitigation approach should align with ATT&CK framework tactic TA0006 (Credential Access) and technique T1566 (Phishing), as this vulnerability enables attackers to harvest session credentials and user information through network-based attacks. Security teams should also consider implementing certificate transparency monitoring and enhanced network monitoring to detect potential exploitation attempts. Additionally, organizations should review their remote access policies and ensure that multi-factor authentication is implemented as a defense-in-depth measure, since the vulnerability primarily affects the initial authentication and session establishment phases of the remote desktop connection process. The recommended remediation timeline should prioritize immediate patching of client software followed by comprehensive network security assessment and monitoring implementation to detect any exploitation attempts.