CVE-2021-20777 : Vulnerability Insights and Analysis

This article provides details about CVE-2021-20777, which involves an improper authorization vulnerability in GU App for Android versions from 4.8.0 to 5.0.2, allowing a remote attacker to lead users to access arbitrary websites via the vulnerable app.

Understanding CVE-2021-20777

This section delves into the specifics of the CVE-2021-20777 vulnerability.

What is CVE-2021-20777?

The CVE-2021-20777 vulnerability pertains to improper authorization in the handler for a custom URL scheme in GU App for Android versions from 4.8.0 to 5.0.2.

The Impact of CVE-2021-20777

The vulnerability allows a remote attacker to direct users to access arbitrary websites using the vulnerable GU App for Android.

Technical Details of CVE-2021-20777

This section outlines the technical aspects of CVE-2021-20777.

Vulnerability Description

The vulnerability stems from improper authorization handling in the custom URL scheme handler of GU App for Android.

Affected Systems and Versions

GU App for Android versions from 4.8.0 to 5.0.2 are affected by this vulnerability.

Exploitation Mechanism

A remote attacker can exploit this vulnerability to manipulate users into accessing malicious websites through the compromised application.

Mitigation and Prevention

This section provides insights on mitigating the risks associated with CVE-2021-20777.

Immediate Steps to Take

Users and administrators should update GU App for Android to the latest version and avoid clicking on suspicious links shared through the app.

Long-Term Security Practices

Implementing proper authorization mechanisms, regular security audits, and user awareness training can enhance long-term security.

Patching and Updates

Vendors should release patches promptly to address the vulnerability in GU App for Android versions from 4.8.0 to 5.0.2.