Bearer Token Reuse Flaw in Pulp-Ansible Collection Remotes

Executive Summary

This vulnerability is in pulp-ansible's bearer-token refresh system for Ansible collection remotes. An access token is stored in a shared module-level variable and reused across all token downloads in a worker process. A malicious user who can sync an Ansible remote with token refresh and redirect it to their own server can obtain and reuse an access token meant for a different remote. The token remains valid until the worker process ends.

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Detection Guidance

Check pulp-ansible worker processes for improper token reuse by inspecting module-level variables in pulp_ansible/app/downloaders.py. Look for the AUTH_TOKEN global variable being shared across multiple downloaders. Review logs for token refresh events where the same token is used for multiple remotes.

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Impact Analysis

If you manage pulp-ansible environments, an attacker with sync permissions could access tokens for other remotes, potentially gaining unauthorized access to services that issued those tokens. This could lead to data exposure or further attacks, though content stored in Pulp remains unchanged and the service is not stopped.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. If tokens grant access to protected health or personal data, their exposure may result in compliance breaches, requiring investigation and potential reporting under these regulations.

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Mitigation Strategies

Apply available security updates for pulp-ansible immediately. Avoid syncing Ansible remotes with token refresh to untrusted servers. Monitor network traffic for unauthorized token reuse. Restart pulp-ansible workers to clear any compromised tokens.

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