PySpector Plugin System Security Bypass Vulnerability Allowing Arbitrary Code Execution

A security validation bypass vulnerability has been identified in the PySpector static analysis security testing framework for Python, affecting versions through 0.1.6. The issue arises in the plugin system, where the validate_plugin_code() function in plugin_system.py is supposed to perform static AST analysis to block dangerous API calls before a plugin is executed. However, the internal resolve_name() helper only processes ast.Name and ast.Attribute node types, returning None for others. This limitation allows plugins to use indirect function calls via getattr() to bypass the security validation. Once a malicious plugin is trusted and executed, it can run arbitrary system commands on the user's machine.

Impact

Exploitation of this vulnerability allows for arbitrary code execution on the user's local machine. After a malicious plugin is installed and trusted, it can execute system commands with the user's permissions. This access could be used to read or write files, exfiltrate sensitive data such as API keys and credentials, establish persistence mechanisms, or move laterally in CI/CD environments where PySpector has elevated permissions.

Reproduction

To reproduce this vulnerability, create a malicious plugin that uses getattr-based indirect calls to bypass the AST validation. Once the plugin is created, run the PySpector Plugin Validator module to confirm that the validator incorrectly marks the plugin as safe. After that, install and trust the plugin using the PySpector plugin install command, and then execute the plugin during a scan.

Remediation

Users should update to PySpector version 0.1.7 or later, where this vulnerability has been patched.