CVE-2023-42441

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

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

Vyper es un Lenguaje de Contrato Inteligente de Python para la Máquina Virtual Ethereum (EVM). A partir de la versión 0.2.9 y anteriores a la versión 0.3.10, los bloqueos del tipo '@nonreentrant("")' o '@nonreentrant('')' no producen comprobaciones de reentrada en tiempo de ejecución. Este problema se corrigió en la versión 0.3.10. Como workaround, asegúrese de que el nombre del bloqueo sea una cadena no vacía.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-09-08 CVE Reserved
2023-09-18 CVE Published
2024-09-24 CVE Updated
2024-09-24 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-667: Improper Locking
CWE-833: Deadlock

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC
https://github.com/vyperlang/vyper/security/advisories/GHSA-3hg2-r75x-g69m	2024-09-24

URL	Date	SRC
https://github.com/vyperlang/vyper/commit/0b740280c1e3c5528a20d47b29831948ddcc6d83	2023-09-21
https://github.com/vyperlang/vyper/pull/3605	2023-09-21

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Vyperlang Search vendor "Vyperlang"		Vyper Search vendor "Vyperlang" for product "Vyper"				>= 0.2.9 < 0.3.10 Search vendor "Vyperlang" for product "Vyper" and version " >= 0.2.9 < 0.3.10"		python		Affected