CVE-2020-0471 Explained : Impact and Mitigation

Android Bluetooth Vulnerability

Understanding CVE-2020-0471

What is CVE-2020-0471?

CVE-2020-0471 is a vulnerability in Android devices that allows proximal attackers to inject packets into an encrypted Bluetooth connection, potentially leading to the escalation of privilege between two Bluetooth devices.

The Impact of CVE-2020-0471

This vulnerability could result in remote escalation of privilege with no additional execution privileges required, without the need for user interaction.

Technical Details of CVE-2020-0471

Vulnerability Description

The issue lies in the reassemble_and_dispatch function of packet_fragmenter.cc, where improper input validation can be exploited by attackers to inject packets into encrypted Bluetooth connections.

Affected Systems and Versions

Product: Android
Affected Versions: Android-8.0, Android-8.1, Android-9, Android-10, Android-11

Exploitation Mechanism

Attackers can perform packet injection into encrypted Bluetooth connections, allowing them to escalate privileges remotely.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches from the device manufacturer promptly.
Avoid connecting to unknown or untrusted Bluetooth devices.

Long-Term Security Practices

Keep devices updated with the latest security patches.
Regularly review and implement security best practices to protect against Bluetooth vulnerabilities.

Patching and Updates

Stay informed about security bulletins and updates from Android to address CVE-2020-0471 effectively.