PyCA Cryptography symmetrically encrypting large values can lead to integer overflow
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. When certain sequences of update() calls with large values (multiple GBs) for symetric encryption or decryption occur, it's possible for an integer overflow to happen, leading to mishandling of buffers. This is patched in version 3.3.2 and newer.
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | cryptography | >= 3.1, < 3.3.2 | 3.3.2 |
Referencias
- https://github.com/pyca/cryptography/issues/5615
- https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst
- https://github.com/pyca/cryptography/compare/3.3.1...3.3.2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/
- https://github.com/advisories/GHSA-rhm9-p9w5-fwm7
- https://github.com/pyca/cryptography/security/advisories/GHSA-rhm9-p9w5-fwm7
- https://nvd.nist.gov/vuln/detail/CVE-2020-36242
- https://github.com/pyca/cryptography/commit/82b6ce28389f0a317bc55ba2091a74b346db7cae
- https://github.com/pyca/cryptography
- https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2021-63.yaml
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H- Debilidad (CWE)
CWE-190, CWE-787- Plataforma
- Python (PyPI)
- Paquete
cryptography- Publicada
- 07.02.2021
- Actualizado
- 11.10.2026 12:19
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2021-63 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-rhm9-p9w5-fwm7 - CC BY 4.0
Historial de vulnerabilidades: cryptography
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
- 24
- Primera → última
- 03.2017 08.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 12
- Media 7
- Baja 5
Divulgaciones por año
- 2017: 1
- 2018: 1
- 2019: 0
- 2020: 1
- 2021: 1
- 2022: 1
- 2023: 7
- 2024: 4
- 2025: 1
- 2026: 7
-
PyCA Cryptography symmetrically encrypting large values can lead to integer overflow esta entrada
Identifica las vulnerabilidades de tu aplicación
Con la integración de DockRay y el inventario de software activado, DockRay compara las versiones notificadas de los componentes con las vulnerabilidades conocidas y avisa de las coincidencias confirmadas. La cobertura depende de la tecnología compatible y de los avisos disponibles.