CVE-2016-2393 in Fingerprint Manager
Summary
by MITRE
Lenovo Fingerprint Manager before 8.01.57 and Touch Fingerprint before 1.00.08 use weak ACLs for unspecified (1) services and (2) files, which allows local users to gain privileges by invalidating local checks.
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Analysis
by VulDB Data Team • 02/05/2019
The vulnerability identified as CVE-2016-2393 affects Lenovo's fingerprint management software components including the Fingerprint Manager version 8.01.57 and Touch Fingerprint version 1.00.08. This issue represents a critical access control weakness that undermines the security posture of Lenovo devices utilizing these fingerprint authentication services. The vulnerability stems from improper implementation of access control lists that fail to properly validate user permissions for critical system services and files.
The technical flaw manifests through weak access control lists that do not adequately enforce privilege separation between different user contexts. Attackers can exploit this weakness by manipulating local system checks that should normally prevent unauthorized access to sensitive fingerprint management services and associated files. This vulnerability operates at the operating system level where local users can bypass normal authentication mechanisms that would typically restrict access to fingerprint data and service configurations. The weakness creates a path for privilege escalation that allows attackers to gain elevated system privileges without proper authentication.
The operational impact of this vulnerability is significant as it enables local attackers to bypass fingerprint-based authentication systems entirely. This weakness can be exploited by any user with local access to the system, potentially allowing unauthorized individuals to access sensitive fingerprint data, modify fingerprint configurations, or gain administrative privileges. The vulnerability particularly affects enterprise environments where fingerprint authentication is used for security-sensitive operations and can compromise the integrity of biometric authentication systems that are expected to provide strong security guarantees.
Security professionals should note that this vulnerability aligns with CWE-284 which addresses improper access control issues in software systems. The attack pattern corresponds to privilege escalation techniques documented in the MITRE ATT&CK framework under privilege escalation tactics. Organizations should implement immediate mitigations including updating to patched versions of Lenovo Fingerprint Manager and Touch Fingerprint software, reviewing and strengthening local access controls, and monitoring for unauthorized access attempts to fingerprint-related services and files. The vulnerability also highlights the importance of proper privilege separation in security-critical components and demonstrates the necessity of comprehensive access control validation mechanisms in system services.