CVE-2021-39694 : Exploit Details and Defense Strategies
Critical CVE-2021-39694 in Android-12 allows default apps to bypass denied permissions, leading to privilege elevation. Learn about impact, mitigation, and preventive measures.
A critical vulnerability in Android-12 allowing default apps to obtain permissions denied by the user, leading to privilege escalation without additional execution privileges.
Understanding CVE-2021-39694
This CVE relates to a permissions bypass in Android-12, potentially exploited for privilege escalation.
What is CVE-2021-39694?
An Android-12 vulnerability enables default apps to gain explicitly denied permissions without user interaction, allowing local escalation of privilege.
The Impact of CVE-2021-39694
The vulnerability poses a risk of local privilege escalation, potentially granting unauthorized access without additional execution privileges.
Technical Details of CVE-2021-39694
This section delves into the specific technical aspects of the CVE.
Vulnerability Description
The vulnerability resides in the parsing of RoleParser.java, where default apps can bypass permissions explicitly denied by the user, enabling privilege escalation.
Affected Systems and Versions
- Product: Android
- Versions Affected: Android-12
Exploitation Mechanism
- The bypass occurs due to a flaw in RoleParser.java
- No user interaction required
Mitigation and Prevention
Protecting your system from the CVE.
Immediate Steps to Take
- Apply official patches from Android
- Monitor for any unauthorized privilege escalation
Long-Term Security Practices
- Regularly update your Android OS
- Review app permissions and limit unnecessary access
Patching and Updates
- Check for updates from Android to patch the vulnerability