Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXZxZ3AtNGpnai01ajY0

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."

Permalink: https://github.com/advisories/GHSA-vqgp-4jgj-5j64
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXZxZ3AtNGpnai01ajY0
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 5 years ago
Updated: 8 months ago

CVSS Score: 8.8
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Identifiers: GHSA-vqgp-4jgj-5j64, CVE-2018-18920
References:

• https://nvd.nist.gov/vuln/detail/CVE-2018-18920
• https://github.com/ethereum/py-evm/issues/1448
• https://github.com/advisories/GHSA-vqgp-4jgj-5j64
• 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/

Repository: https://github.com/ethereum/py-evm
Blast Radius: 20.1

Affected Packages