---
cve: "CVE-2020-36242"
severity: "LOW"
cvss: 3.1
epss: "6.7%"
vendor: "n/a"
kev: false
exploited: false
published: "2021-02-07 20:15:12"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T20:09:42+02:00"
---

# CVE-2020-36242

> 3.1 LOW · 🧪 PoC

## Beschreibung

In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.

## Patch verfügbar (OSV)

- 82b6ce28389f0a317bc55ba2091a74b346db7cae (Commit)

## Referenzen

- <https://github.com/pyca/cryptography/issues/5615>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/>
- <https://www.oracle.com/security-alerts/cpuapr2022.html>
- <https://github.com/pyca/cryptography/compare/3.3.1...3.3.2>
- <https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst>
- <https://www.oracle.com/security-alerts/cpujul2022.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2020-36242) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_