CVE-2020-27059 : Exploit Details and Defense Strategies
Learn about CVE-2020-27059, a tapjacking vulnerability in Android's AuthenticationClient.java that allows local privilege escalation without additional execution privileges. Find out how to mitigate and prevent this security issue.
Android tapjacking vulnerability allows local privilege escalation without additional execution privileges.
Understanding CVE-2020-27059
What is CVE-2020-27059?
CVE-2020-27059 is a tapjacking vulnerability in Android's AuthenticationClient.java that could lead to local privilege escalation.
The Impact of CVE-2020-27059
This vulnerability could allow an attacker to perform a tapjacking attack when requesting the user's fingerprint, leading to local escalation of privilege without needing additional execution privileges.
Technical Details of CVE-2020-27059
Vulnerability Description
The vulnerability exists in the onAuthenticated function of AuthenticationClient.java, enabling a tapjacking attack due to an overlaid window.
Affected Systems and Versions
- Product: Android
- Affected Versions: Android-8.0, Android-8.1, Android-9, Android-10, Android-11
Exploitation Mechanism
- User interaction is required for exploitation
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by the vendor
- Avoid granting unnecessary permissions to apps
Long-Term Security Practices
- Regularly update the device's operating system
- Be cautious when granting permissions to apps
Patching and Updates
- Stay informed about security bulletins and updates from Android