CVE-2018-18920
Py-EVM Smart Contract Execution Denial of Service
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."
INFO
Published Date :
Nov. 12, 2018, 2:29 a.m.
Last Modified :
Feb. 4, 2019, 1:31 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2018-18920 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-18920.
| URL | Resource |
|---|---|
| https://github.com/ethereum/py-evm/issues/1448 | Exploit Third Party Advisory |
| https://twitter.com/AlexanderFisher/status/1060923428641878019 | Third Party Advisory |
| https://twitter.com/NettaLab/status/1060889400102383617 | Third Party Advisory |
| https://www.reddit.com/r/ethereum/comments/9vkk2g/netta_labs_claim_to_have_found_a_vulnerability_in/e9d3wyx/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Solidity Forcibly Send Ether Vulnerability to a Smart Contract continuation of the list of general EcoSystem security from attacks
ecosystem eth ethereum ethereum-contract smart-contracts solidity solidity-codes solidity-contracts vulnerabilities vulnerability
JavaScript
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-18920 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-18920 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Feb. 04, 2019
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://twitter.com/NettaLab/status/1060889400102383617 No Types Assigned https://twitter.com/NettaLab/status/1060889400102383617 Third Party Advisory Changed Reference Type https://github.com/ethereum/py-evm/issues/1448 No Types Assigned https://github.com/ethereum/py-evm/issues/1448 Exploit, Third Party Advisory Changed Reference Type https://twitter.com/AlexanderFisher/status/1060923428641878019 No Types Assigned https://twitter.com/AlexanderFisher/status/1060923428641878019 Third Party Advisory Changed Reference Type https://www.reddit.com/r/ethereum/comments/9vkk2g/netta_labs_claim_to_have_found_a_vulnerability_in/e9d3wyx/ No Types Assigned https://www.reddit.com/r/ethereum/comments/9vkk2g/netta_labs_claim_to_have_found_a_vulnerability_in/e9d3wyx/ Third Party Advisory Added CWE CWE-119 Added CPE Configuration OR *cpe:2.3:a:ethereum:py-evm:0.2.0:alpha.33:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-18920 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-18920
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.68 }} -0.01%
score
0.80332
percentile