CVE-2023-47564 in Qsync Central
Summary
by MITRE • 02/02/2024
An incorrect permission assignment for critical resource vulnerability has been reported to affect Qsync Central. If exploited, the vulnerability could allow authenticated users to read or modify the resource via a network.
We have already fixed the vulnerability in the following versions: Qsync Central 4.4.0.15 ( 2024/01/04 ) and later Qsync Central 4.3.0.11 ( 2024/01/11 ) and later
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Analysis
by VulDB Data Team • 02/25/2024
The vulnerability identified as CVE-2023-47564 represents a critical access control flaw within Qsync Central software that enables authenticated users to gain unauthorized access to sensitive resources. This issue falls under the category of improper access control as defined by CWE-284, where the system fails to properly enforce authorization checks for critical resources. The vulnerability specifically affects the permission assignment mechanism, allowing users who have authenticated to the system to perform actions they should not be authorized to execute. The flaw manifests when the software fails to correctly validate user privileges before granting access to critical system resources, creating a potential pathway for privilege escalation attacks.
The technical implementation of this vulnerability stems from inadequate validation of user permissions within the Qsync Central application. When authenticated users attempt to access specific resources, the system should verify their authorization levels against predefined access control policies. However, the flaw allows these users to bypass normal permission checks and directly access resources that should be restricted to administrators or users with specific roles. The vulnerability operates over network protocols, meaning that attackers can exploit it remotely without requiring physical access to the system. This network-based exploitation capability significantly increases the attack surface and makes the vulnerability particularly dangerous in enterprise environments where network access is common.
The operational impact of CVE-2023-47564 extends beyond simple unauthorized access, as it creates potential for data breaches, system compromise, and operational disruption. Authenticated users with elevated privileges could read confidential data, modify system configurations, or even delete critical files depending on the specific resources affected. The vulnerability's presence in Qsync Central systems creates a significant risk for organizations that rely on this software for file synchronization and sharing services, as it undermines the fundamental security assumptions of the application. Organizations using affected versions face potential compliance violations, as this vulnerability directly conflicts with security standards such as those outlined in the NIST Cybersecurity Framework and ISO/IEC 27001 requirements for access control management. The impact is particularly severe because the vulnerability allows for both read and write operations, providing attackers with full control over the compromised resources.
Mitigation strategies for this vulnerability should focus on immediate software updates to the patched versions mentioned in the advisory, specifically Qsync Central 4.4.0.15 and later, or 4.3.0.11 and later. Organizations should conduct comprehensive vulnerability assessments to identify all systems running affected versions and prioritize their remediation efforts. Additionally, implementing network segmentation and access controls can help limit the potential impact if exploitation occurs, while monitoring for unusual access patterns can aid in early detection of potential attacks. The vulnerability's classification aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation, making it important for security teams to monitor user behavior and implement principle of least privilege controls. Regular security audits and penetration testing should be conducted to ensure that similar permission assignment flaws do not exist in other parts of the organization's infrastructure.