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HIGH8.8

PYSEC-2018-155

Details

Py-EVM v0.2.0-alpha.33 allows attackers to make a vm.execute_bytecode call that triggers computation._stack.values with '"stack": [100, 100, 0]' where b'\x' was expected, resulting in an execution failure because of an invalid opcode. This is reportedly related to "smart contracts can be executed indefinitely without gas being paid."

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Affected packages

PyPI/evm-py
Introduced in: 0

No fixed version published yet for evm-py (pip). Pin to a known-safe version or switch to an alternative.

References