CVE-2015-2870 in BF-630
Summary
by MITRE
Cross-site scripting (XSS) vulnerability on Chiyu BF-630, BF-630W, and BF-660C fingerprint access-control devices allows remote attackers to inject arbitrary web script or HTML via a SCRIPT element.
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Analysis
by VulDB Data Team • 11/06/2024
The CVE-2015-2870 vulnerability represents a critical cross-site scripting flaw affecting Chiyu BF-630, BF-630W, and BF-660C fingerprint access-control devices. This vulnerability resides within the web interface of these security appliances, which are designed to manage physical access control systems in enterprise and industrial environments. The affected devices typically serve as central management points for fingerprint authentication systems, controlling access to secured facilities and sensitive areas. The presence of XSS vulnerabilities in such critical infrastructure components poses significant risks to overall security posture, as these devices often contain sensitive operational data and may be accessible from untrusted network segments.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the web-based management interface of these access-control devices. Attackers can exploit this weakness by injecting malicious SCRIPT elements through carefully crafted web requests, bypassing normal security controls that should prevent arbitrary code execution. The vulnerability specifically affects how the device processes user-supplied input in web forms and configuration parameters, failing to properly sanitize or escape script tags and associated payloads. This allows remote attackers with network access to the device to execute arbitrary JavaScript code within the context of a victim's browser session, potentially compromising the integrity of the management interface and the data it handles.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform session hijacking, steal administrative credentials, and potentially gain unauthorized access to the physical security infrastructure. An attacker could leverage this vulnerability to modify access control policies, disable security features, or create backdoor accounts within the access-control system. The attack surface is particularly concerning given that these devices often operate in environments where network segmentation is minimal or absent, allowing attackers to reach the vulnerable web interface from external networks. This vulnerability directly impacts the CIA triad by compromising confidentiality through credential theft, integrity through unauthorized configuration changes, and availability through potential system disruption.
Mitigation strategies for CVE-2015-2870 should focus on immediate network segmentation to isolate these devices from untrusted networks, implementation of web application firewalls to filter malicious requests, and application of vendor-provided security patches. Organizations should conduct comprehensive network scans to identify all affected devices and implement monitoring for suspicious access patterns. The vulnerability aligns with CWE-79 which describes cross-site scripting flaws, and represents a technique commonly employed in the initial access phase of attacks targeting industrial control systems. According to ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application, where attackers leverage web application vulnerabilities to establish footholds within target environments. Regular security assessments and vulnerability management programs should include specific checks for similar XSS vulnerabilities in industrial control systems, as these devices often receive less frequent security updates compared to general-purpose systems, making them attractive targets for persistent attackers seeking long-term access to physical security infrastructure.