CVE-2021-0434 : Exploit Details and Defense Strategies
Discover the CVE-2021-0434 vulnerability in Android that could lead to local privilege escalation by allowing malicious Bluetooth devices to acquire permissions. Learn about impact, affected versions, and mitigation.
A vulnerability with ID CVE-2021-0434 has been identified in the BluetoothPermissionRequest.java file of the Android operating system. This vulnerability could potentially lead to a phishing attack that allows malicious Bluetooth devices to gain permissions by exploiting a flaw in the consent dialog.
Understanding CVE-2021-0434
This section provides insights into the nature of the CVE-2021-0434 vulnerability.
What is CVE-2021-0434?
The CVE-2021-0434 vulnerability in the BluetoothPermissionRequest.java file of Android could lead to a local escalation of privilege without the need for additional execution privileges.
The Impact of CVE-2021-0434
The impact of this vulnerability is significant as it requires user interaction for exploitation, potentially allowing malicious Bluetooth devices to acquire permissions.
Technical Details of CVE-2021-0434
This section delves into the technical aspects of the CVE-2021-0434 vulnerability.
Vulnerability Description
In the onReceive function of BluetoothPermissionRequest.java, a phishing attack is possible, enabling malicious Bluetooth devices to acquire permissions based on inadequate information in the consent dialog.
Affected Systems and Versions
The affected products include Android versions 10, 11, and 9.
Exploitation Mechanism
The vulnerability exploits a lack of information in the consent dialog, leading to a local escalation of privilege without requiring additional execution privileges.
Mitigation and Prevention
Safeguarding measures to mitigate the CVE-2021-0434 vulnerability are crucial for maintaining system security.
Immediate Steps to Take
Users are advised to be cautious when interacting with Bluetooth devices and dialogs requiring permissions to prevent exploitation.
Long-Term Security Practices
Implementing secure coding practices, regularly updating systems, and educating users on potential security risks are essential for long-term security.
Patching and Updates
It is recommended to apply the latest security patches and updates provided by Android to address and mitigate the CVE-2021-0434 vulnerability.