CVE-2021-39663 : Security Advisory and Response
Learn about CVE-2021-39663, a vulnerability in Android-10 allowing local privilege escalation. Find out its impact, affected versions, and mitigation steps.
This CVE-2021-39663 article provides details about a vulnerability in Android-10 that could allow for local privilege escalation.
Understanding CVE-2021-39663
CVE-2021-39663 is a vulnerability in Android-10 that enables a potential bypass of permission checks due to a confused deputy scenario, leading to local privilege escalation.
What is CVE-2021-39663?
- Vulnerability in openFileAndEnforcePathPermissionsHelper of MediaProvider.java
- Allows for a permissions check bypass leading to local escalation of privilege
- User execution privileges required without user interaction
The Impact of CVE-2021-39663
- Possible local escalation of privilege
- No user interaction needed for exploitation
Technical Details of CVE-2021-39663
This section delves into specific technical aspects of the CVE-2021-39663 vulnerability.
Vulnerability Description
The vulnerability lies in the openFileAndEnforcePathPermissionsHelper of MediaProvider.java, allowing for a permissions check bypass.
Affected Systems and Versions
- Product: Android
- Version: Android-10
Exploitation Mechanism
- Confused deputy scenario leading to local privilege escalation
Mitigation and Prevention
Below are steps to mitigate and prevent exploitation of CVE-2021-39663.
Immediate Steps to Take
- Apply relevant security patches promptly
- Monitor for any unusual system behavior
- Restrict unnecessary permissions for apps
Long-Term Security Practices
- Regular security training for developers
- Implement the principle of least privilege
Patching and Updates
- Ensure timely updates and patches for affected systems