CVE-2022-35943 : Security Advisory and Response

A detailed analysis of SameSite vulnerability in Shield for CodeIgniter 4 and how it can lead to cross-site request forgery (CSRF) protection bypass.

Understanding CVE-2022-35943

This article covers the impact, technical details, and mitigation strategies for the CVE-2022-35943 vulnerability.

What is CVE-2022-35943?

Shield, an authentication and authorization framework for CodeIgniter 4, is affected by a SameSite vulnerability that may allow attackers to bypass CSRF protection mechanisms.

The Impact of CVE-2022-35943

The vulnerability poses a medium severity risk with a CVSS base score of 5.9 due to the possibility of high integrity impact.

Technical Details of CVE-2022-35943

An overview of vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability allows SameSite attackers to exploit CSRF protection bypass in CodeIgniter Shield, targeting subdomain sites.

Affected Systems and Versions

CodeIgniter Shield versions greater than 4.3.2 and v1.0.0-beta.2 are impacted.

Exploitation Mechanism

Attack complexity is high as the attacker needs network access and user interaction to exploit the vulnerability.

Mitigation and Prevention

Best practices to mitigate and prevent the CVE-2022-35943 vulnerability in Shield for CodeIgniter 4.

Immediate Steps to Take

Upgrade to CodeIgniter v4.2.3 or later and Shield v1.0.0-beta.2 or later. Implement temporary workarounds to enhance security.

Long-Term Security Practices

Review and enhance CSRF protection mechanisms, restrict subdomain access, and regularly update security configurations.

Patching and Updates

Regularly apply security patches, monitor for updates, and stay informed about security advisories.