Improper Cryptographic Signature Verification in Network-AI APSAdapter

Executive Summary

Network-AI before version 5.13.4 has a vulnerability where the APSAdapter component incorrectly verifies cryptographic signatures. The default local verifier accepts any non-empty string as valid, allowing unauthenticated attackers to forge delegation payloads with arbitrary scopes and bypass signature checks to obtain signed permission tokens for sensitive resources like SHELL_EXEC.

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Detection Guidance

Check if your Network-AI version is below 5.13.4 by running commands like 'pip show network-ai' or 'apt list --installed | grep network-ai'. Inspect APSAdapter configurations for default 'local' verification mode without custom verifySignature callbacks.

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Impact Analysis

Unauthenticated attackers could exploit this to gain unauthorized access to sensitive operations such as executing shell commands. They could forge permission tokens, bypass authentication, and potentially take control of systems relying on Network-AI for authorization.

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Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data or systems, violating confidentiality and integrity requirements in GDPR and HIPAA. Organizations using affected versions may fail compliance audits due to inadequate access controls and cryptographic verification.

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Mitigation Strategies

Upgrade Network-AI to version 5.13.4 or later immediately. If using APSAdapter, ensure a custom verifySignature callback is implemented to enforce proper cryptographic verification. Disable default 'local' verification mode if not required.

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