Improper Authorization Code Reuse in Apache CXF

Executive Summary

This vulnerability involves improper handling of single-use authorization codes in Apache CXF's OAuth2 authorization code grant provider. A remote attacker can exploit a race condition in the token exchange process to obtain multiple valid access tokens from a single authorization code by sending concurrent requests before the system deletes the code.

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Detection Guidance

This vulnerability involves improper handling of OAuth2 authorization codes in Apache CXF. Detection requires checking for multiple access tokens generated from a single authorization code. Monitor logs for concurrent token exchange requests and verify if the system uses vulnerable versions (before 4.2.4, 4.1.9, or 3.6.13). No specific commands are provided in the context.

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Impact Analysis

If you use Apache CXF with OAuth2 authorization code grants, an attacker could gain unauthorized access to your resources by reusing a single authorization code multiple times. This could lead to unauthorized data access, privilege escalation, or other security breaches depending on the application's permissions.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating compliance requirements under GDPR (data protection) and HIPAA (health information privacy). Organizations may face legal penalties, reputational damage, and loss of trust if such breaches occur due to inadequate security controls.

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Mitigation Strategies

Upgrade Apache CXF to versions 4.2.4, 4.1.9, or 3.6.13 or later to address the improper authorization code enforcement issue.

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