CVE-2020-28493
Jinja2 Redos Vulnerability
Description
This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.
INFO
Published Date :
Feb. 1, 2021, 8:15 p.m.
Last Modified :
Nov. 7, 2023, 3:21 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2020-28493 has a 4 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2020-28493.
| URL | Resource |
|---|---|
| https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20 | Broken Link |
| https://github.com/pallets/jinja/pull/1343 | Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/ | |
| https://security.gentoo.org/glsa/202107-19 | Third Party Advisory |
| https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994 | Exploit 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
CMake Shell Perl C++ C Batchfile CSS Makefile M4 Python
Poetry plugin for checking vulnerabilities in dependencies 🚀
packaging poetry python python3 security vulnerability poetry-plugin
Python Shell
List of RegEx DoS (ReDoS) CVEs and resources
security awesome redos regex dos regex-dos pentesting awesome-list regex-security
A list of CVE's with Proof of Concepts
JavaScript HTML Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-28493 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-28493 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.
-
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 Snyk https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/ [No types assigned] Removed Reference Snyk https://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/ -
Modified Analysis by [email protected]
Apr. 08, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202107-19 No Types Assigned https://security.gentoo.org/glsa/202107-19 Third Party Advisory -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE NVD-CWE-noinfo CWE-400 -
CVE Modified by [email protected]
Jul. 08, 2021
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202107-19 [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 22, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 15, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/ [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 10, 2021
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L -
CVE Modified by [email protected]
Feb. 26, 2021
Action Type Old Value New Value Changed Description This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDOS vulnerability of the regex is mainly due to the sub-pattern [a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+ This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory. This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the `_punctuation_re regex` operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory. -
Initial Analysis by [email protected]
Feb. 03, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Changed Reference Type https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20 No Types Assigned https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20 Broken Link Changed Reference Type https://github.com/pallets/jinja/pull/1343 No Types Assigned https://github.com/pallets/jinja/pull/1343 Patch, Third Party Advisory Changed Reference Type https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994 No Types Assigned https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994 Exploit, Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:palletsprojects:jinja:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-28493 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-2020-28493
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.20 }} 0.02%
score
0.57285
percentile