CVE-2022-25820 in Fingerprint Matching Algorithm
Summary
by MITRE • 03/10/2022
A vulnerable design in fingerprint matching algorithm prior to SMR Mar-2022 Release 1 allows physical attackers to perform brute force attack on screen lock password.
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Analysis
by VulDB Data Team • 03/13/2022
The vulnerability identified as CVE-2022-25820 represents a critical design flaw in the fingerprint matching algorithm implementation that affected devices prior to the SMR March 2022 security release. This weakness stems from insufficient cryptographic security measures within the biometric authentication system, creating an exploitable condition that significantly undermines the device's security posture. The vulnerability specifically impacts the screen lock protection mechanism, where the fingerprint recognition algorithm fails to properly implement rate limiting or anti-brute force mechanisms during authentication attempts. This design deficiency creates a pathway for physical attackers to systematically test multiple password combinations against the locked device interface, effectively bypassing the intended security controls that should prevent unauthorized access through legitimate authentication methods.
The technical implementation of this vulnerability lies in the insufficient entropy and predictable pattern handling within the fingerprint matching algorithm. The system fails to properly manage authentication attempts through adequate throttling mechanisms or adaptive response behaviors that would normally prevent rapid successive authentication trials. This flaw allows attackers to exploit the lack of proper session management and authentication attempt tracking, enabling them to conduct brute force attacks against the screen lock password without triggering the expected security mitigations. The vulnerability specifically affects devices that implement fingerprint-based authentication as part of their multi-factor authentication framework, where the biometric component becomes a weak link in the overall security architecture. From a cybersecurity perspective, this represents a failure in the principle of least privilege and proper access control implementation, where the system does not adequately enforce authentication rate limiting or behavioral analysis to detect suspicious activity patterns.
The operational impact of CVE-2022-25820 extends beyond simple unauthorized device access, as it fundamentally compromises the integrity of the device's security model. Physical attackers can leverage this vulnerability to gain unauthorized access to sensitive data, applications, and system resources that should remain protected by the screen lock mechanism. The attack vector requires physical proximity to the device but does not necessitate sophisticated technical skills beyond basic device manipulation and password guessing capabilities. This vulnerability particularly affects enterprise environments where mobile device security is paramount, as it allows attackers to compromise employee devices and potentially gain access to corporate networks, sensitive applications, and confidential data. The implications are further amplified when considering that this vulnerability affects devices prior to the SMR March 2022 release, indicating that a significant number of devices in the field may remain vulnerable and potentially expose large user populations to unauthorized access.
Mitigation strategies for this vulnerability require immediate implementation of security patches and firmware updates that address the underlying design flaw in the fingerprint matching algorithm. Organizations should prioritize updating all affected devices to the SMR March 2022 release or later versions that contain the necessary security fixes. Additionally, system administrators should implement enhanced monitoring of authentication attempts and establish automated alerting mechanisms for unusual authentication patterns that may indicate brute force attack attempts. The remediation process should include reviewing and strengthening the overall authentication framework to ensure proper rate limiting, session management, and behavioral analysis capabilities are implemented. From a security architecture standpoint, this vulnerability highlights the importance of implementing proper cryptographic controls and following established security frameworks such as those outlined in the CWE catalog, specifically addressing weaknesses in authentication mechanisms and access control implementations. The ATT&CK framework categorizes this vulnerability under the credential access and privilege escalation domains, emphasizing the need for comprehensive security controls that prevent unauthorized access through multiple attack vectors and maintain proper security boundaries within mobile device environments.