Executive Summary

This vulnerability affects Cloud Foundry UUA when SAML 2.0 bearer assertions are enabled for a client. The issue arises because the UAA accepts SAML 2.0 bearer assertions that are neither signed nor encrypted, allowing an attacker to bypass normal authentication controls.

As a result, an attacker can obtain a token for any user, which grants unauthorized access to systems protected by UAA.

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Impact Analysis

The vulnerability allows an attacker to impersonate any user by obtaining their token without proper authentication.

• Unauthorized access to UAA-protected systems.
• Potential exposure of sensitive data due to compromised user tokens.
• Increased risk of privilege escalation and unauthorized actions within the affected environment.

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Compliance Impact

This vulnerability allows an attacker to obtain a token for any user and gain unauthorized access to UAA-protected systems by exploiting the acceptance of unsigned and unencrypted SAML 2.0 bearer assertions.

Such unauthorized access can lead to exposure of sensitive personal or protected health information, potentially violating data protection requirements under standards like GDPR and HIPAA.

Therefore, this vulnerability could negatively impact compliance with these regulations by compromising confidentiality and access controls mandated by them.

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