CVE-2024-52285 in SiPass integrated AC5102
Summary
by MITRE • 03/11/2025
A vulnerability has been identified in SiPass integrated AC5102 (ACC-G2) (All versions < V6.4.8), SiPass integrated ACC-AP (All versions < V6.4.8). Affected devices expose several MQTT URLs without authentication. This could allow an unauthenticated remote attacker to access sensitive data.
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Analysis
by VulDB Data Team • 03/11/2025
This vulnerability resides in the SiPass integrated access control systems, specifically affecting the AC5102 (ACC-G2) and ACC-AP models across all software versions prior to V6.4.8. The flaw represents a critical security oversight where MQTT (Message Queuing Telemetry Transport) communication endpoints are accessible without proper authentication mechanisms. MQTT is a lightweight messaging protocol commonly used in IoT environments for device communication, making this exposure particularly concerning for access control infrastructure. The vulnerability stems from improper configuration of network services that should normally be restricted to authorized personnel only.
The technical implementation of this flaw allows unauthenticated remote attackers to establish connections to MQTT brokers within the affected systems without requiring valid credentials. This exposure creates a pathway for attackers to intercept, manipulate, or extract sensitive data from the access control environment. The MQTT protocol's design inherently supports publish-subscribe messaging patterns, which when improperly secured can enable attackers to subscribe to various system messages containing access logs, user credentials, door access records, and other confidential operational data. This represents a direct violation of the principle of least privilege and demonstrates inadequate network segmentation practices.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with potentially valuable intelligence for further exploitation. An attacker could gather information about access patterns, user behavior, and system configurations that would aid in crafting more sophisticated attacks against the physical security infrastructure. The vulnerability enables passive reconnaissance capabilities that could be leveraged to identify high-value targets within the access control network, potentially leading to privilege escalation or lateral movement within the facility's security ecosystem. This exposure directly impacts the confidentiality and integrity aspects of the CIA triad, undermining the fundamental security posture of the access control system.
Organizations should immediately implement mitigation strategies including mandatory firmware updates to version 6.4.8 or later, which should address the MQTT authentication issues. Network segmentation should be enforced to isolate access control systems from general network traffic, implementing firewalls and access control lists to restrict MQTT port access. Additionally, organizations should conduct thorough network audits to identify and remediate any other unauthenticated services or endpoints that may be exposed. The vulnerability aligns with CWE-284 (Improper Access Control) and represents a significant concern under ATT&CK framework category T1071.004 (Application Layer Protocol: DNS) and T1566 (Phishing) as attackers may use the exposed data for social engineering campaigns. Regular security assessments and vulnerability scanning should be implemented to identify similar misconfigurations in other networked security devices.