CVE-2021-21367 : Vulnerability Insights and Analysis

This article delves into the details of CVE-2021-21367, focusing on an incorrect authorization vulnerability in switchboard-plug-bluetooth for elementary OS versions prior to 2.3.5. Learn about the impact, technical details, and mitigation strategies to secure affected systems.

Understanding CVE-2021-21367

CVE-2021-21367 highlights an incorrect authorization vulnerability in switchboard-plug-bluetooth for elementary OS versions below 2.3.5.

What is CVE-2021-21367?

The vulnerability allows physically proximate attackers to pair with affected devices without user consent, potentially accessing sensitive data or controlling the device.

The Impact of CVE-2021-21367

The vulnerability poses a moderate risk, with a CVSS base severity score of 6.1 (Medium). Attackers could pair with devices and potentially extract data or manipulate the device functions.

Technical Details of CVE-2021-21367

Explore the specific aspects of the vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in switchboard-plug-bluetooth allows automatic acceptance of Bluetooth requests, enabling unauthorized device pairings and potential data extraction.

Affected Systems and Versions

Devices running switchboard-plug-bluetooth versions >= 2.3.0 and < 2.3.5 are vulnerable to this incorrect authorization issue.

Exploitation Mechanism

Physically close attackers can exploit the vulnerability by initiating Bluetooth service or pairing requests.

Mitigation and Prevention

Discover immediate steps and long-term security practices to mitigate the risk of CVE-2021-21367.

Immediate Steps to Take

For mitigation, update affected systems to version 2.3.5 and remove any untrusted/paired devices. Limit Bluetooth plug usage in public areas to reduce exposure.

Long-Term Security Practices

To enhance security, avoid using the Bluetooth plug within switchboard on unpatched systems. Consider using alternative device pairing methods.

Patching and Updates

Ensure prompt installation of version 2.3.5 to address the vulnerability effectively and prevent unauthorized pairings.