CVE-2021-41303 : Security Advisory and Response

Apache Shiro before 1.8.0, when using Apache Shiro with Spring Boot, a specially crafted HTTP request may cause an authentication bypass. Users are advised to update to Apache Shiro 1.8.0.

Understanding CVE-2021-41303

Apache Shiro before version 1.8.0 is susceptible to an authentication bypass when utilized with Spring Boot.

What is CVE-2021-41303?

CVE-2021-41303 is a vulnerability in Apache Shiro that allows for an authentication bypass through a specifically manipulated HTTP request.

The Impact of CVE-2021-41303

This vulnerability can lead to unauthorized access to system resources and potentially compromise user data.

Technical Details of CVE-2021-41303

Apache Shiro version 1.8.0 and below are affected by this vulnerability.

Vulnerability Description

The issue arises when Apache Shiro is integrated with Spring Boot, enabling malicious HTTP requests to bypass authentication mechanisms.

Affected Systems and Versions

Product: Apache Shiro
Vendor: Apache Software Foundation
Versions Affected: Apache Shiro versions less than 1.8.0

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a specific HTTP request to circumvent authentication controls.

Mitigation and Prevention

It is essential to take immediate action to address and prevent potential security breaches.

Immediate Steps to Take

Upgrade to Apache Shiro version 1.8.0 or newer to mitigate the vulnerability.
Disable or restrict access to any publicly exposed Apache Shiro instances.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software components to the latest versions.
Implement strong authentication and authorization policies.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Apache Shiro and apply them promptly.