CVE-2019-5451 Explained : Impact and Mitigation

This CVE involves an authentication bypass vulnerability in the Nextcloud Android app before version 3.6.1, allowing unauthorized access to files through a specific manipulation method.

Understanding CVE-2019-5451

This vulnerability enables attackers to bypass the lock protection mechanism in the Nextcloud Android app, potentially leading to unauthorized access to sensitive files.

What is CVE-2019-5451?

The vulnerability in the Nextcloud Android app before version 3.6.1 allows unauthorized access to files by exploiting a flaw in the lock protection mechanism.

The Impact of CVE-2019-5451

The vulnerability could result in unauthorized access to sensitive files stored within the Nextcloud Android app, compromising user data and privacy.

Technical Details of CVE-2019-5451

This section provides technical details about the vulnerability.

Vulnerability Description

The flaw in the Nextcloud Android app prior to version 3.6.1 allows unauthorized access to files by manipulating the app's lock protection mechanism.

Affected Systems and Versions

Product: com.nextcloud.client
Version: 3.6.1

Exploitation Mechanism

Attackers can exploit this vulnerability by repeatedly opening and closing the Nextcloud Android app within a short timeframe to bypass the lock protection.

Mitigation and Prevention

Protecting systems from CVE-2019-5451 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the Nextcloud Android app to version 3.6.1 or later to mitigate the vulnerability.
Avoid opening and closing the app repeatedly within a short period to reduce the risk of exploitation.

Long-Term Security Practices

Regularly update all software and applications to the latest versions to patch known vulnerabilities.
Educate users on secure app usage practices to prevent unauthorized access to sensitive data.
Implement strong authentication mechanisms to enhance security.
Monitor app behavior for unusual activities that may indicate exploitation.

Patching and Updates

Ensure timely installation of security patches and updates provided by Nextcloud to address known vulnerabilities.