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CVE-2021-0433 : Security Advisory and Response

Learn about CVE-2021-0433 affecting Android devices. Understand the impact, technical details, affected systems, and mitigation steps for this Bluetooth pairing vulnerability.

Android devices running versions 8.1 and above are vulnerable to a security issue that allows an attacker to bypass user consent during Bluetooth device pairing. This could result in a local privilege escalation, enabling malicious devices to pair without requiring additional execution privileges.

Understanding CVE-2021-0433

This CVE involves a vulnerability in the DeviceChooserActivity.java file on Android devices, potentially leading to tapjacking/overlay attacks during Bluetooth device pairing.

What is CVE-2021-0433?

The CVE-2021-0433 vulnerability in Android devices allows attackers to pair malicious Bluetooth devices without the user's consent, leading to local privilege escalation.

The Impact of CVE-2021-0433

The impact of this vulnerability is significant as it enables attackers to pair rogue devices with the target Android device without the user's knowledge, potentially leading to further compromise.

Technical Details of CVE-2021-0433

This section provides more in-depth technical details about the vulnerability affecting Android devices.

Vulnerability Description

The vulnerability resides in the onCreate function of DeviceChooserActivity.java, allowing a tapjacking/overlay attack to bypass user consent during Bluetooth device pairing.

Affected Systems and Versions

Android versions 8.1, 9, 10, and 11 are all affected by this security issue, making a wide range of devices susceptible to exploitation.

Exploitation Mechanism

Exploiting this vulnerability requires user interaction during the Bluetooth device pairing process, allowing malicious devices to pair without additional privileges.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-0433, follow the recommended security practices and apply necessary patches and updates.

Immediate Steps to Take

Users should exercise caution when pairing Bluetooth devices and be wary of any unexpected pairing requests to prevent potential attacks.

Long-Term Security Practices

Implement robust security measures, including regular security updates, to maintain the integrity of the Android device and protect against potential vulnerabilities.

Patching and Updates

Ensure that your Android device is up to date with the latest security patches to address CVE-2021-0433 and other known vulnerabilities.

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