CVE-2021-41181 Explained : Impact and Mitigation
Learn about CVE-2021-41181 where Nextcloud Android Talk app exposed chat messages and files due to lockscreen state detection vulnerability. Take immediate actions by updating to version 12.3.0.
Nextcloud Talk app exposes chat messages on lockscreen.
Understanding CVE-2021-41181
Nextcloud talk is a self-hosting messaging service where a vulnerability allowed unauthorized access to chat messages and files when the device was locked.
What is CVE-2021-41181?
The Nextcloud Android Talk app prior to version 12.3.0 did not properly detect the lockscreen state, enabling attackers physical access to view chat messages and files.
The Impact of CVE-2021-41181
The vulnerability scored a CVSS base score of 2.4 (Low severity) with exposure to sensitive information and compromise of confidentiality.
Technical Details of CVE-2021-41181
The following technical aspects outline the CVE-2021-41181 details:
Vulnerability Description
- Lack of proper lockscreen state detection during incoming calls in Nextcloud Android Talk app
Affected Systems and Versions
- Nextcloud Android Talk application versions earlier than 12.3.0
Exploitation Mechanism
- Attacker physical access to a locked phone during an incoming call
Mitigation and Prevention
Immediate Steps to Take
- Update Nextcloud Android Talk app to version 12.3.0
Long-Term Security Practices
- Regularly update applications to stay protected
Patching and Updates
- Apply all security patches and updates promptly