CVE-2020-36242
Python Fernet Cryptography Buffer Overflow Vulnerability
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.
INFO
Published Date :
Feb. 7, 2021, 8:15 p.m.
Last Modified :
Sept. 5, 2024, 4:09 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-36242 has a 5 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-36242
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-36242.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python Dockerfile
None
Dockerfile Python
None
Command line client for quay/clair v4.x.x
clair clair-scanner docker security-tools security docker-security
Makefile Go
Check your Python environments for vulnerable Open Source packages with OSS Index or Sonatype Nexus Lifecycle.
python vulnerabilities vulnerability-scanners ossindex nexus-iq sonatype-iq
Python Dockerfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-36242 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-36242 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CPE Deprecation Remap by [email protected]
Sep. 05, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:cryptography_project:cryptography:*:*:*:*:*:python:*:* versions from (excluding) 3.3.2 OR *cpe:2.3:a:cryptography.io:cryptography:*:*:*:*:*:python:*:* versions from (excluding) 3.3.2 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ [No types assigned] Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ -
Modified Analysis by [email protected]
Dec. 06, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpujul2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujul2022.html Patch, Third Party Advisory -
CVE Modified by [email protected]
Jul. 25, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned] -
Modified Analysis by [email protected]
May. 12, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpuapr2022.html No Types Assigned https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Apr. 20, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpuapr2022.html [No Types Assigned] -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-190 CWE-120 CWE-190 CWE-787 -
Modified Analysis by [email protected]
Feb. 19, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 12, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/ [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 09, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Changed Reference Type https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst No Types Assigned https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst Release Notes, Third Party Advisory Changed Reference Type https://github.com/pyca/cryptography/compare/3.3.1...3.3.2 No Types Assigned https://github.com/pyca/cryptography/compare/3.3.1...3.3.2 Patch, Third Party Advisory Changed Reference Type https://github.com/pyca/cryptography/issues/5615 No Types Assigned https://github.com/pyca/cryptography/issues/5615 Exploit, Patch, Third Party Advisory Added CWE NIST CWE-190 Added CWE NIST CWE-120 Added CPE Configuration OR *cpe:2.3:a:cryptography_project:cryptography:*:*:*:*:*:python:*:* versions up to (excluding) 3.3.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-36242 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-36242
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.85 }} 0.41%
score
0.80209
percentile