CVE-2021-21127 : Vulnerability Insights and Analysis

Google Chrome prior to version 88.0.4324.96 is affected by insufficient policy enforcement in extensions, enabling a remote attacker to bypass content security policy through a specially crafted Chrome Extension.

Understanding CVE-2021-21127

This CVE details a vulnerability in Google Chrome that allows remote attackers to circumvent content security policy using malicious Chrome Extensions.

What is CVE-2021-21127?

CVE-2021-21127 is a security vulnerability in Google Chrome versions earlier than 88.0.4324.96, which results in insufficient policy enforcement within extensions. This flaw can be exploited by remote threat actors via a crafted Chrome Extension.

The Impact of CVE-2021-21127

The impact of this CVE is significant as it allows attackers to bypass content security policy, potentially leading to further exploitation of user systems and data.

Technical Details of CVE-2021-21127

This section outlines the specific technical details of the CVE.

Vulnerability Description

The vulnerability in Google Chrome, specifically before version 88.0.4324.96, arises from insufficient policy enforcement within extensions. Attackers exploit this to bypass content security policy.

Affected Systems and Versions

Systems running Google Chrome versions prior to 88.0.4324.96 are vulnerable to this security issue. Users must update to a secure version to mitigate the risk.

Exploitation Mechanism

Remote attackers can leverage a specially crafted Chrome Extension to exploit this vulnerability and bypass content security policy in affected Chrome versions.

Mitigation and Prevention

Protecting systems from CVE-2021-21127 requires immediate action and ongoing security measures.

Immediate Steps to Take

Users should update their Google Chrome browser to version 88.0.4324.96 or later to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implementing secure browsing habits, avoiding untrusted extensions, and staying updated on security patches are essential for long-term protection.

Patching and Updates

Regularly checking for and applying security updates from Google Chrome is crucial to ensure protection against known vulnerabilities.