CVE-2021-39790 : What You Need to Know
Learn about CVE-2021-39790, a vulnerability in Android 12L that allows local escalation of privilege. Understand the impact, technical details, and mitigation steps.
This CVE record pertains to a vulnerability in Android 12L that allows for local escalation of privilege through a manipulation of visual voicemail settings.
Understanding CVE-2021-39790
This vulnerability in Android 12L can be exploited leading to a potential elevation of privilege without requiring additional execution privileges.
What is CVE-2021-39790?
In the Dialer component of Android 12L, a missing permission check allows for manipulation of visual voicemail settings, creating an opportunity for local privilege escalation. User interaction is necessary for exploiting this vulnerability.
The Impact of CVE-2021-39790
Exploitation of this vulnerability could result in a local escalation of privilege on the affected Android device.
Technical Details of CVE-2021-39790
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability exists in the Dialer component of Android 12L, enabling the manipulation of visual voicemail settings without proper permission validation.
Affected Systems and Versions
- Product: Android
- Version: Android-12L
Exploitation Mechanism
The exploitation of this vulnerability requires user interaction to manipulate visual voicemail settings, ultimately leading to local privilege escalation.
Mitigation and Prevention
Taking immediate action and implementing long-term security measures are crucial.
Immediate Steps to Take
- Users should be cautious while interacting with visual voicemail settings on Android 12L devices.
- Implement security best practices to minimize the risk of privilege escalation.
Long-Term Security Practices
- Regularly update the Android operating system to patch known vulnerabilities.
- Conduct security awareness training to educate users on potential risks and safe practices.
- Employ security solutions to monitor and mitigate privilege escalation attempts.
Patching and Updates
Google may release patches or security updates to address this vulnerability in future Android 12L updates.