CVEvulnerability
CVE-2020-36242
9.1 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2021-02-07
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- CVSS 2.0 ([email protected])
- 6.4 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:P
- Weaknesses
- CWE-190, CWE-787
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.
Affected configurations
• cryptography.io cryptography (< 3.3.2)
• fedoraproject fedora 33
• oracle communications cloud native core network function cloud native environment 1.10.0
Related
References
- https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst Release Notes, Third Party Advisory
- https://github.com/pyca/cryptography/compare/3.3.1...3.3.2 Patch, Third Party Advisory
- https://github.com/pyca/cryptography/issues/5615 Exploit, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ lists.fedoraproject.org
- https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory
- https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst Release Notes, Third Party Advisory
- https://github.com/pyca/cryptography/compare/3.3.1...3.3.2 Patch, Third Party Advisory
- https://github.com/pyca/cryptography/issues/5615 Exploit, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ lists.fedoraproject.org
- https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory