CVE-2023-7017 in Lux Lock
Summary
by MITRE • 03/15/2024
Sciener locks' firmware update mechanism do not authenticate or validate firmware updates if passed to the lock through the Bluetooth Low Energy service. A challenge request can be sent to the lock with a command to prepare for an update, rather than an unlock request, allowing an attacker to compromise the device.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/28/2024
The vulnerability identified as CVE-2023-7017 affects Sciener smart locks that utilize Bluetooth Low Energy for firmware updates. This represents a critical security flaw in the device's update mechanism that fundamentally undermines the integrity and authenticity of the firmware distribution process. The vulnerability stems from the absence of proper authentication and validation procedures within the Bluetooth service interface, creating an attack vector that allows malicious actors to manipulate the lock's firmware update process without proper authorization. The flaw specifically manifests when the lock receives firmware update commands through its Bluetooth Low Energy service, bypassing the normal security controls that should validate the legitimacy of update requests.
The technical implementation of this vulnerability enables attackers to exploit the lock's update preparation mechanism through specially crafted Bluetooth commands. Rather than following the standard unlock protocol, an attacker can send a challenge request that instructs the lock to prepare for a firmware update. This manipulation allows unauthorized firmware to be installed on the device, effectively compromising the lock's operational integrity and security posture. The vulnerability is particularly concerning because it operates at the protocol level, where the lock's firmware update service lacks cryptographic verification or authentication mechanisms. This weakness aligns with CWE-310, which addresses cryptographic weaknesses, and specifically relates to the absence of proper authentication in security-critical operations.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete device compromise and potential security breaches for the protected premises. An attacker who successfully exploits this vulnerability can install malicious firmware that may provide persistent backdoor access, disable security features, or alter the lock's operational behavior in ways that compromise physical security. The implications are severe because smart locks serve as primary physical security mechanisms for residential and commercial properties, making this vulnerability particularly dangerous from a risk management perspective. The attack surface is further expanded by the fact that Bluetooth Low Energy communications are typically less secure than wired connections and may be more easily intercepted or manipulated in close proximity environments.
Mitigation strategies for this vulnerability should focus on implementing proper firmware authentication mechanisms and strengthening the Bluetooth service interface security. Device manufacturers should implement cryptographic verification of firmware updates, requiring digital signatures or hashes that validate the authenticity of update packages before installation. Network segmentation and Bluetooth security enhancements, including proper encryption and authentication protocols, should be implemented to prevent unauthorized access to the update service. The remediation approach should follow security best practices outlined in the NIST Cybersecurity Framework and align with ATT&CK technique T1547.001, which addresses registry run keys and startup folder persistence. Organizations should also consider implementing network monitoring to detect unusual Bluetooth activity patterns that might indicate exploitation attempts, while ensuring that firmware update mechanisms are properly isolated and secured against unauthorized manipulation.