CVE-2020-0439 : Exploit Details and Defense Strategies
Learn about CVE-2020-0439, a vulnerability in Android's PackageManagerService.java allowing permissions bypass for instant apps. Understand the impact, affected systems, and mitigation steps.
Android vulnerability in PackageManagerService.java allows for a possible permissions bypass, leading to privilege escalation for instant apps.
Understanding CVE-2020-0439
In generatePackageInfo of PackageManagerService.java, a permissions bypass vulnerability exists in Android.
What is CVE-2020-0439?
This CVE involves an incorrect permission check in Android's PackageManagerService.java, potentially enabling local escalation of privilege that allows unauthorized permissions for instant apps without requiring user interaction.
The Impact of CVE-2020-0439
The vulnerability could lead to instant apps gaining access to permissions not allowed for them, posing a risk of privilege escalation.
Technical Details of CVE-2020-0439
Affected Systems and Versions
- Product: Android
- Versions: Android-8.1, Android-9, Android-10, Android-11, Android-8.0
Vulnerability Description
- Type: Elevation of privilege
- ID: A-140256621
Affected Systems and Versions
- Android versions: Android-8.1, Android-9, Android-10, Android-11, Android-8.0
Exploitation Mechanism
The vulnerability allows local apps to access permissions not intended for them, potentially leading to privilege escalation for instant apps.
Mitigation and Prevention
Immediate Steps to Take
- Apply security updates from the vendor promptly.
- Monitor for any unusual app behavior that may indicate exploitation.
Long-Term Security Practices
- Regularly update the Android operating system to the latest version.
- Implement app-level security best practices to limit potential vulnerabilities.
Patching and Updates
- Stay informed about security bulletins and patch releases from Android.