CVE-2021-0688 : Security Advisory and Response
Learn about CVE-2021-0688, a security flaw in Android devices that allows a lock screen bypass, leading to privilege escalation. Understand its impact, affected versions, and mitigation steps.
This article provides detailed insights into CVE-2021-0688, a vulnerability impacting Android devices.
Understanding CVE-2021-0688
CVE-2021-0688 is a security vulnerability in Android that allows a lock screen bypass due to a race condition in the lockNow function of PhoneWindowManager.java. This flaw could potentially result in a local escalation of privilege without requiring user interaction.
What is CVE-2021-0688?
The vulnerability in lockNow of PhoneWindowManager.java can be exploited to bypass the lock screen on Android devices running versions Android-10, Android-11, Android-8.1, and Android-9. An attacker could gain elevated privileges without the need for user interaction, posing a significant security risk.
The Impact of CVE-2021-0688
The impact of CVE-2021-0688 is the potential for a malicious actor to bypass the lock screen on affected Android devices and execute privileged operations without user consent. This could lead to unauthorized access to sensitive information and compromise the device's security.
Technical Details of CVE-2021-0688
The following technical details shed light on the vulnerability:
Vulnerability Description
The vulnerability arises from a race condition in the lockNow function of PhoneWindowManager.java, enabling a lock screen bypass.
Affected Systems and Versions
Android devices running versions Android-10, Android-11, Android-8.1, and Android-9 are susceptible to this security flaw.
Exploitation Mechanism
Exploiting CVE-2021-0688 involves triggering the race condition in lockNow to bypass the lock screen and gain elevated privileges on the affected Android device.
Mitigation and Prevention
To safeguard against CVE-2021-0688, consider the following mitigation strategies:
Immediate Steps to Take
Users should update their Android devices to the latest security patches provided by the device manufacturer or Google to address the vulnerability.
Long-Term Security Practices
Enabling secure lock screen settings, using strong authentication methods, and exercising caution while installing apps can enhance the security posture of Android devices.
Patching and Updates
Regularly installing security updates and patches from trusted sources is crucial to protect devices from known vulnerabilities and emerging threats.