Ech0 Admin Password Change via Profile Read Scope

Executive Summary

This vulnerability affects the Ech0 framework before version 4.4.3. The PUT /user endpoint is protected by a profile:read scope, which is meant to be read-only. However, it allows write operations like changing passwords. An attacker with an admin's profile:read access token can exploit this to change the admin's password, log in, and obtain an unrestricted session token that bypasses all scope enforcement.

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Detection Guidance

Check if Ech0 is running a vulnerable version (< 4.4.3) by inspecting the version in use. Monitor for unauthorized password changes or session token generation by reviewing logs for PUT /user endpoint activity with profile:read tokens performing write operations.

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Impact Analysis

An attacker could gain full admin access, including managing users, system settings, tokens, and files. This could lead to unauthorized data access, modification, or deletion. The impact includes high confidentiality and integrity breaches but no availability impact.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection principles and HIPAA's security requirements for protected health information. Non-compliance risks include legal penalties and reputational damage.

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Mitigation Strategies

Upgrade Ech0 to version 4.4.3 or later. Add a profile:write scope and enforce it for the PUT /user endpoint and other write operations currently using profile:read. Review and revoke any potentially compromised admin tokens.

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