CVE-2020-36242

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2020-36242
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.

9.1 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

6.4 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:P

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References
Link Resource
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/
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/
https://www.oracle.com/security-alerts/cpuapr2022.html Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html Patch Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
History

21 Nov 2024, 05:29

Type Values Removed Values Added
References () https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst - Release Notes, Third Party Advisory () https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst - Release Notes, Third Party Advisory
References () https://github.com/pyca/cryptography/compare/3.3.1...3.3.2 - Patch, Third Party Advisory () https://github.com/pyca/cryptography/compare/3.3.1...3.3.2 - Patch, Third Party Advisory
References () https://github.com/pyca/cryptography/issues/5615 - Exploit, Patch, Third Party Advisory () https://github.com/pyca/cryptography/issues/5615 - Exploit, Patch, Third Party Advisory
References () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ - () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ -
References () https://www.oracle.com/security-alerts/cpuapr2022.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpuapr2022.html - Patch, Third Party Advisory
References () https://www.oracle.com/security-alerts/cpujul2022.html - Patch, Third Party Advisory () https://www.oracle.com/security-alerts/cpujul2022.html - Patch, Third Party Advisory

05 Sep 2024, 16:09

Type Values Removed Values Added
CPE cpe:2.3:a:cryptography_project:cryptography:*:*:*:*:*:python:*:* cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:*
First Time Cryptography.io cryptography
Cryptography.io

25 Jul 2022, 18:15

Type Values Removed Values Added
References
  • (N/A) https://www.oracle.com/security-alerts/cpujul2022.html -

12 May 2022, 14:33

Type Values Removed Values Added
CPE cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
References (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html - (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html - Patch, Third Party Advisory

20 Apr 2022, 00:15

Type Values Removed Values Added
References
  • (MISC) https://www.oracle.com/security-alerts/cpuapr2022.html -
CWE CWE-120 CWE-787
Information

Published : 2021-02-07 20:15

Updated : 2024-11-21 05:29

NVD link : CVE-2020-36242

Mitre link : CVE-2020-36242

CVE.ORG link : CVE-2020-36242

JSON object : View

Products Affected

cryptography.io

  • cryptography

fedoraproject

  • fedora

oracle

  • communications_cloud_native_core_network_function_cloud_native_environment
CWE
CWE-190

Integer Overflow or Wraparound

CWE-787

Out-of-bounds Write