CVE-2020-0394 : Exploit Details and Defense Strategies

Android-8.0 Android-8.1 Android-9 Android-10 Android-11

Understanding CVE-2020-0394

A vulnerability in BluetoothPairingDialog.java on Android devices may allow for local privilege escalation and unauthorized access to contact lists.

What is CVE-2020-0394?

The CVE-2020-0394 vulnerability involves a tapjacking vector in the onCreate function of BluetoothPairingDialog.java, potentially enabling untrusted devices to access contact lists on Android devices without requiring additional execution privileges.

The Impact of CVE-2020-0394

This vulnerability could lead to local privilege escalation, allowing malicious actors to access contact lists on affected Android devices via tapjacking, posing a risk of unauthorized data access.

Technical Details of CVE-2020-0394

Vulnerability Description

The issue arises from an insecure default value in the onCreate function of BluetoothPairingDialog.java, facilitating the tapjacking vector that enables unauthorized contact list access.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability requires user interaction for exploitation, potentially through misleading UI elements atop legitimate user interface components.

Mitigation and Prevention

Immediate Steps to Take

Users should exercise caution while granting permissions to Bluetooth-related dialogs and interactions.
Apply security updates and patches from the device manufacturer promptly.

Long-Term Security Practices

Regularly check for security bulletins from Android for vulnerability notifications.
Employ best practices for secure device usage, such as avoiding granting unnecessary permissions.
Consider using security software to monitor and protect against potential threats.

Patching and Updates

Refer to the Google Android Security Bulletin dated September 1, 2020, for relevant patches and mitigation techniques.