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CVE-2018-18920

N/A
Published: November 12, 2018 at 02:00 AM UTC
Updated: June 17, 2026 at 01:48 AM UTC
1 product affected across 1 vendorPy Evm

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Severity
N/A
Exploit prediction
EPSS 3%

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."

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/ethereum/py-evm/issues/1448
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://twitter.com/AlexanderFisher/status/1060923428641878019
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://twitter.com/NettaLab/status/1060889400102383617
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.reddit.com/r/ethereum/comments/9vkk2g/netta_labs_claim_to_have_found_a_vulnerability_in/e9d3wyx/

CVSS

6.8MEDIUM[email protected]
Confidentiality
PARTIAL
Integrity
PARTIAL
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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