CVE-2020-36242 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Reference

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://www.oracle.com/security-alerts/cpuapr2022.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

9.1