CVE-2023-32675

Public Exploit
Nonpayable default functions are sometimes payable in vyper

Description

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In contracts with more than one regular nonpayable function, it is possible to send funds to the default function, even if the default function is marked `nonpayable`. This applies to contracts compiled with vyper versions prior to 0.3.8. This issue was fixed by the removal of the global `calldatasize` check in commit `02339dfda`. Users are advised to upgrade to version 0.3.8. Users unable to upgrade should avoid use of nonpayable default functions.

Category

3.7
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.18%
Vendor Advisory github.com
Affected: vyperlang vyper
Published at:
Updated at:

References

Link Tags
https://github.com/vyperlang/vyper/security/advisories/GHSA-vxmm-cwh2-q762 exploit patch vendor advisory
https://github.com/vyperlang/vyper/commit/02339dfda0f3caabad142060d511d10bfe93c520 patch

Frequently Asked Questions

What is the severity of CVE-2023-32675?
CVE-2023-32675 has been scored as a low severity vulnerability.
How to fix CVE-2023-32675?
To fix CVE-2023-32675, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-32675 being actively exploited in the wild?
It is possible that CVE-2023-32675 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-32675?
CVE-2023-32675 affects vyperlang vyper.
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