CVE-2024-30063 is a vulnerability identified in Microsoft Windows 10 Version 1809, specifically within the Windows Distributed File System (DFS) component. The root cause is improper restriction of names for files and other resources (CWE-641), which can be exploited to achieve remote code execution. This vulnerability allows an attacker with low privileges and requiring user interaction to execute arbitrary code remotely, potentially compromising confidentiality and integrity of affected systems. The CVSS v3.1 score is 6.7 (medium severity), reflecting the attack vector as adjacent network (AV:A), low attack complexity (AC:L), requiring low privileges (PR:L), and user interaction (UI:R). The scope remains unchanged (S:U), and the impact on confidentiality and integrity is high (C:H, I:H), while availability is unaffected (A:N). No known exploits have been reported in the wild, and no official patches have been released yet. The vulnerability was reserved in March 2024 and published in June 2024. DFS is widely used in enterprise environments for distributed file sharing and replication, making this vulnerability relevant for organizations relying on Windows 10 Version 1809 in their infrastructure. The improper restriction of resource names could allow attackers to bypass security controls or execute malicious code by manipulating DFS namespaces or file paths. This could lead to unauthorized data access or system compromise if exploited successfully.

For European organizations, the impact of CVE-2024-30063 can be significant, particularly for enterprises and public sector entities using Windows 10 Version 1809 with DFS enabled. Confidentiality and integrity of sensitive data stored or accessed via DFS could be compromised, leading to potential data breaches or unauthorized modifications. Although availability is not directly impacted, the breach of confidentiality and integrity can disrupt business operations and damage organizational reputation. Sectors such as finance, healthcare, government, and critical infrastructure that rely heavily on Windows DFS for file sharing and replication are at higher risk. The requirement for user interaction and low privileges lowers the barrier for exploitation within trusted internal networks or via phishing attacks. The absence of known exploits in the wild currently reduces immediate risk, but the medium severity rating and potential for remote code execution necessitate proactive defense measures. Organizations failing to address this vulnerability may face increased risk of targeted attacks or lateral movement by threat actors within their networks.

1. Restrict access to DFS namespaces and shares to only authorized users and systems, enforcing strict access control lists (ACLs). 2. Apply the principle of least privilege to user accounts and service accounts interacting with DFS to minimize potential exploitation impact. 3. Monitor DFS-related network traffic and system logs for unusual or unauthorized activity indicative of exploitation attempts. 4. Educate users about the risks of interacting with untrusted content or links that could trigger the user interaction requirement for exploitation. 5. Segment networks to isolate DFS servers from less trusted network zones, reducing the attack surface. 6. Prepare for timely deployment of official patches from Microsoft once released, including testing in controlled environments before production rollout. 7. Use endpoint detection and response (EDR) tools to detect anomalous behavior related to DFS processes or remote code execution attempts. 8. Regularly audit and update DFS configurations to ensure compliance with security best practices and remove legacy or unused shares. 9. Consider upgrading affected systems to newer Windows versions if feasible, as Windows 10 Version 1809 is an older release with limited support lifecycle remaining.