CVE-2021-35951 Explained : Impact and Mitigation
Discover the impact of CVE-2021-35951 on the fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker, allowing remote attackers to send malicious firmware updates.
This article provides insights into CVE-2021-35951, a vulnerability in the fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker that allows an unauthenticated remote attacker to send a malicious firmware update via BLE, potentially bricking the device.
Understanding CVE-2021-35951
This section delves into the details of CVE-2021-35951 and its implications.
What is CVE-2021-35951?
CVE-2021-35951 is a security vulnerability in the fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker that enables an unauthenticated remote attacker to send a malicious firmware update over BLE, leading to potential device bricking.
The Impact of CVE-2021-35951
The impact entails the unauthorized installation of harmful firmware updates, resulting in the device becoming inoperable and potentially compromising user data.
Technical Details of CVE-2021-35951
This section explores the technical aspects of the CVE-2021-35951 vulnerability.
Vulnerability Description
The vulnerability allows remote attackers to exploit BLE connectivity to deliver unauthorized firmware updates, rendering the device unusable.
Affected Systems and Versions
The fastrack Reflex 2.0 W307S_REFLEX_v90.89 Activity Tracker is affected by this vulnerability, with no specific version mentioned.
Exploitation Mechanism
Exploitation involves sending a malicious firmware update through BLE, taking advantage of the lack of authentication mechanisms to brick the device.
Mitigation and Prevention
Here are the strategies to mitigate and prevent exploitation of CVE-2021-35951.
Immediate Steps to Take
Users should immediately cease BLE connectivity and contact the product manufacturer for guidance and remediation steps.
Long-Term Security Practices
Implement robust authentication measures, regularly update firmware, and monitor BLE connections to prevent unauthorized access.
Patching and Updates
Stay informed about security advisories from the vendor and promptly apply patches or firmware updates to address CVE-2021-35951.