ModelScope Remote Code Execution via PyYAML Unsafe Loader

Executive Summary

ModelScope uses PyYAML's unsafe yaml.Loader to parse model configuration files, enabling arbitrary code execution via Python object construction tags. Attackers can create malicious model repositories with poisoned configuration files that execute code when loaded by users.

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Detection Guidance

Check for ModelScope installations using PyYAML with unsafe loader configurations. Inspect Python scripts or model config files for yaml.load() calls without SafeLoader. Search for suspicious model repositories with .yaml or .yml files containing Python object construction tags like !!python/object.

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Impact Analysis

This vulnerability allows attackers to execute arbitrary code on your system when you load a malicious model configuration file. This could lead to data theft, system compromise, or further network infiltration.

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Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face fines or penalties for non-compliance.

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Mitigation Strategies

Update ModelScope to a patched version that uses yaml.SafeLoader. Replace yaml.load() with yaml.safe_load() in all Python scripts. Audit model repositories for malicious YAML files and remove any containing object construction tags.

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