CVE-2021-39738 : Security Advisory and Response

This article provides details about CVE-2021-39738, a vulnerability in Android's CarSettings that could lead to privilege escalation.

Understanding CVE-2021-39738

This section delves into the specifics of CVE-2021-39738.

What is CVE-2021-39738?

CVE-2021-39738 is a vulnerability in Android's CarSettings that allows pairing Bluetooth devices without user consent, leading to local privilege escalation without additional execution privileges. The affected versions include Android-10, Android-11, Android-12, and Android-12L.

The Impact of CVE-2021-39738

The exploit could potentially result in a local elevation of privilege without the need for user interaction.

Technical Details of CVE-2021-39738

This section provides technical insights into CVE-2021-39738.

Vulnerability Description

The vulnerability in CarSettings allows Bluetooth device pairing bypassing user consent, enabling local privilege escalation.

Affected Systems and Versions

Product: Android
Versions Affected: Android-10, Android-11, Android-12, Android-12L

Exploitation Mechanism

The vulnerability bypasses permission checks in CarSettings, facilitating Bluetooth device pairing without user consent, leading to privilege escalation.

Mitigation and Prevention

Explore steps to mitigate and prevent CVE-2021-39738.

Immediate Steps to Take

Update the Android OS to the latest patched version.
Regularly review and adjust Bluetooth settings on devices.

Long-Term Security Practices

Regularly check for security updates from Android.
Implement network segmentation to limit potential attack surfaces.

Patching and Updates

Apply security patches released by Android promptly.