CVE-2023-42441

Vyper has incorrect re-entrancy lock when key is empty string

State: Published
Severity: 5.3 Medium
Published: Sep 18, 2023
Updated: Sep 24, 2024
Reserved: Sep 8, 2023

Description

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). Starting in version 0.2.9 and prior to version 0.3.10, locks of the type `@nonreentrant("")` or `@nonreentrant('')` do not produce reentrancy checks at runtime. This issue is fixed in version 0.3.10. As a workaround, ensure the lock name is a non-empty string.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-833 Deadlock

Affected Products

Product	Versions
vypervyperlang	>= 0.2.9, < 0.3.10Affected

References

https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69m
https://github.com/vyperlang/vyper/pull/3605
https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.