CVE-2019-2009 : Exploit Details and Defense Strategies

Android Bluetooth Remote Code Execution Vulnerability

Understanding CVE-2019-2009

What is CVE-2019-2009?

A vulnerability in the l2c_lcc_proc_pdu function in the l2c_fcr.cc file of Android versions 7.0 to 9 could allow remote code execution over Bluetooth without additional privileges.

The Impact of CVE-2019-2009

This vulnerability could be exploited by attackers to execute remote code over Bluetooth without user interaction, potentially leading to a compromise of the affected device.

Technical Details of CVE-2019-2009

Vulnerability Description

The vulnerability arises from a missing bounds check in the l2c_lcc_proc_pdu function, enabling an out-of-bounds write.

Affected Systems and Versions

Product: Android
Versions: 7.0, 7.1.1, 7.1.2, 8.0, 8.1, 9

Exploitation Mechanism

The absence of a bounds check in the vulnerable function allows attackers to trigger remote code execution over Bluetooth without requiring additional execution privileges.

Mitigation and Prevention

Immediate Steps to Take

Apply security patches provided by Android for the affected versions.
Avoid connecting to untrusted or unknown Bluetooth devices.
Regularly update the device's operating system to the latest version.

Long-Term Security Practices

Implement network segmentation to isolate Bluetooth communication.
Use Bluetooth only in trusted environments.

Patching and Updates

It is crucial to promptly install security patches released by Android to address this vulnerability.