CVE-2021-39741 Explained : Impact and Mitigation
Learn about CVE-2021-39741, an Android Keymaster vulnerability on Android-12L that allows local privilege escalation without user interaction. Find out the impact, technical details, and mitigation steps.
Android Keymaster vulnerability allows local privilege escalation on Android-12L.
Understanding CVE-2021-39741
A vulnerability in the Keymaster component of Android can lead to privilege escalation without user interaction.
What is CVE-2021-39741?
- Type: Elevation of privilege
- Product: Android
- Versions affected: Android-12L
- CVE ID: CVE-2021-39741
The Impact of CVE-2021-39741
The vulnerability could allow an attacker to escalate privileges locally without user interaction.
Technical Details of CVE-2021-39741
Android Keymaster vulnerability technical details.
Vulnerability Description
An out-of-bounds write in Keymaster due to a missing bounds check enables local privilege escalation.
Affected Systems and Versions
- Product: Android
- Affected Version: Android-12L
Exploitation Mechanism
The vulnerability can be exploited locally to escalate privileges without needing user interaction.
Mitigation and Prevention
Steps to mitigate and prevent CVE-2021-39741.
Immediate Steps to Take
- Apply security patches from the vendor promptly
- Monitor for any unusual system behavior indicating exploitation
Long-Term Security Practices
- Regularly update software and firmware on devices
- Implement least privilege access controls to limit potential damage
Patching and Updates
- Regularly check for and apply security updates from the vendor to mitigate the vulnerability.