CVE-2021-39789 : Exploit Details and Defense Strategies
Learn about CVE-2021-39789, a local privilege escalation vulnerability in Android-12L due to a missing permission check in Telecom. Find out the impact, affected systems, exploitation details, and mitigation steps.
Android-12L has a vulnerability that could lead to a local escalation of privilege due to a missing permission check in Telecom, potentially allowing exploitation without user interaction.
Understanding CVE-2021-39789
This CVE involves a security flaw in Android-12L that could be exploited for privilege escalation.
What is CVE-2021-39789?
This CVE identifies a potential leak of TTY mode change in Telecom, leading to a local privilege escalation vulnerability in Android-12L without requiring additional execution privileges.
The Impact of CVE-2021-39789
The vulnerability could allow an attacker to locally escalate privileges on the affected Android-12L devices.
Technical Details of CVE-2021-39789
The technical aspects of the CVE.
Vulnerability Description
Details the missing permission check in Telecom that could result in privilege escalation on Android-12L.
Affected Systems and Versions
- Product: Android
- Versions Affected: Android-12L
Exploitation Mechanism
- Vulnerability in TTY mode change
- No additional execution privileges needed
Mitigation and Prevention
Steps to address and prevent exploitation.
Immediate Steps to Take
- Apply the latest security patches from the vendor
- Monitor device behavior for any signs of privilege escalation
Long-Term Security Practices
- Regularly update the device software
- Implement strict permission controls for system functions
Patching and Updates
Stay informed about security bulletins and promptly apply patches released by the vendor.