vyper default functions don't respect nonreentrancy keys
Summary
Prior to v0.3.0, __default__() functions did not respect the @nonreentrancy decorator and the lock was not emitted. This is a known bug and was already visible in the issue tracker (https://github.com/vyperlang/vyper/issues/2455), but it is being re-issued as an advisory so that tools relying on the advisory publication list can incorporate it into their searches.
A contract search was additionally performed and no vulnerable contracts were found in production.
PoC
@external
@payable
@nonreentrant("default")
def __default__():
passafter codegen:
[seq,
[if, [lt, calldatasize, 4], [goto, fallback]],
[mstore, 28, [calldataload, 0]],
[with, _func_sig, [mload, 0], seq],
[seq_unchecked,
[label, fallback],
[seq,
pass,
# Line 5
pass,
pass,
# Line 4
stop]]],Impact
No vulnerable production contracts were found. Additionally, using a lock on a default function is a very sparsely used pattern. As such, the impact is low.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | vyper | < 0.3.0 | 0.3.0 |
Referencias
- https://github.com/vyperlang/vyper/security/advisories/GHSA-m2v9-w374-5hj9
- https://github.com/vyperlang/vyper/commit/93287e5ac184b53b395c907d40701f721daf8177
- https://github.com/vyperlang/vyper/issues/2455
- https://github.com/advisories/GHSA-m2v9-w374-5hj9
- https://nvd.nist.gov/vuln/detail/CVE-2024-32648
- https://github.com/pypa/advisory-database/tree/main/vulns/vyper/PYSEC-2024-163.yaml
- https://github.com/vyperlang/vyper
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Debilidad (CWE)
CWE-667- Plataforma
- Python (PyPI)
- Paquete
vyper- Publicada
- 25.04.2024
- Actualizado
- 11.10.2026 12:20
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2024-163 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-m2v9-w374-5hj9 - CC BY 4.0
Historial de vulnerabilidades: vyper
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 47
- Primera → última
- 03.2020 10.2026
- Sin corrección
- 5
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 3
- Alta 14
- Media 20
- Baja 10
Divulgaciones por año
- 2020: 1
- 2021: 5
- 2022: 4
- 2023: 14
- 2024: 14
- 2025: 6
- 2026: 3
-
vyper default functions don't respect nonreentrancy keys esta entrada
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