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EUVD-2018-0118 · Published Nov 21, 2018
Py-EVM is vulnerable to arbitrary bytecode injection
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."
Technologies
Ethereum Py-EvmPy-Evm Py-Evm
Weaknesses
CWE-119
CVSS scores
- v3.08.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
Initial Access
References
- https://github.com/ethereum/py-evm/issues/1448
- https://twitter.com/AlexanderFisher/status/1060923428641878019
- https://twitter.com/NettaLab/status/1060889400102383617
- https://www.reddit.com/r/ethereum/comments/9vkk2g/netta_labs_claim_to_have_found_a_vulnerability_in/e9d3wyx/
- https://nvd.nist.gov/vuln/detail/CVE-2018-18920
- https://github.com/advisories/GHSA-vqgp-4jgj-5j64
Potentially impacted assets
See if this affects your attack surface
