National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-18920 Detail

Description

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."

Source:  MITRE
Description Last Modified:  11/11/2018

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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/

Technical Details

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Quick Info

CVE Dictionary Entry:
CVE-2018-18920
NVD Published Date:
11/11/2018
NVD Last Modified:
11/11/2018