CVE-2021-23957 : Vulnerability Insights and Analysis

A security vulnerability, identified as CVE-2021-23957, has been found in Mozilla Firefox that could lead to iframe sandbox bypass on Android devices. Below are the details of this CVE and how it impacts users.

Understanding CVE-2021-23957

This section delves into what CVE-2021-23957 entails and the implications it has for Firefox users.

What is CVE-2021-23957?

The vulnerability in Mozilla Firefox allowed the iframe sandbox on Android to be bypassed using the Android-specific

intent

URL scheme. Notably, this issue exclusively affected Firefox for Android versions below 85.

The Impact of CVE-2021-23957

The exploitation of this vulnerability could have enabled threat actors to escape the iframe sandbox and potentially execute malicious code, posing a risk to user data and system security.

Technical Details of CVE-2021-23957

This section provides technical insights into the vulnerability, including the description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

Through the Android-specific

intent

URL scheme, threat actors could abuse navigations to bypass the iframe sandbox, affecting Firefox for Android versions below 85.

Affected Systems and Versions

The vulnerability impacted Firefox for Android versions preceding 85, while other operating systems remained unaffected by this specific issue.

Exploitation Mechanism

By manipulating the Android

intent

URL scheme, attackers could exploit navigation processes to evade the sandbox restrictions, potentially leading to unauthorized access and code execution.

Mitigation and Prevention

In light of CVE-2021-23957, users and organizations are advised to take immediate preventive actions and adopt long-term security practices to mitigate risks.

Immediate Steps to Take

Users should update their Firefox for Android to version 85 or newer to address this vulnerability and prevent potential exploitation.

Long-Term Security Practices

Implementing robust security measures, such as regular software updates, security awareness training, and utilizing security tools, can enhance the overall protection of devices and data.

Patching and Updates

Mozilla has released patches and updates to address CVE-2021-23957. It is crucial for users to promptly install these updates to safeguard their systems from potential security threats.