CVE-2023-32675: Always-Incorrect Control Flow Implementation

May 19, 2023 (updated October 26, 2023)

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.

References

github.com/advisories/GHSA-vxmm-cwh2-q762
github.com/vyperlang/vyper/commit/02339dfda0f3caabad142060d511d10bfe93c520
github.com/vyperlang/vyper/commit/903727006c1e5ebef99fa9fd5d51d62bd33d72a9
github.com/vyperlang/vyper/security/advisories/GHSA-vxmm-cwh2-q762
nvd.nist.gov/vuln/detail/CVE-2023-32675

Detect and mitigate CVE-2023-32675 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →