Brute-Force Authentication Bypass in IRIS Web Application

Executive Summary

The IRIS web application version 2.4.26 and possibly others lacks brute-force protection for user authentication. This allows attackers to repeatedly attempt login credentials without being locked out or rate-limited, potentially gaining unauthorized access.

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Detection Guidance

Check for repeated failed login attempts to the /auth/mfa-verify endpoint without account lockouts or rate-limiting. Monitor HTTP 200 responses for incorrect OTP submissions, which indicate missing brute-force protection.

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Impact Analysis

An attacker could exploit this to guess weak passwords or bypass authentication, leading to unauthorized access to sensitive data or system functions. This undermines account security and could result in data breaches or system compromise.

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Compliance Impact

This vulnerability may violate compliance requirements that mandate strong authentication and protection against unauthorized access, such as GDPR's data security principles or HIPAA's access controls. Non-compliance could lead to legal penalties or reputational damage.

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Mitigation Strategies

Implement rate-limiting on the /auth/mfa-verify endpoint to block excessive requests. Configure HTTP 429 responses for repeated failed OTP attempts to prevent brute-force attacks.

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