CVE-2021-21236
CairoSVG Regular Expression Denial of Service
Description
CairoSVG is a Python (pypi) package. CairoSVG is an SVG converter based on Cairo. In CairoSVG before version 2.5.1, there is a regular expression denial of service (REDoS) vulnerability. When processing SVG files, the python package CairoSVG uses two regular expressions which are vulnerable to Regular Expression Denial of Service (REDoS). If an attacker provides a malicious SVG, it can make cairosvg get stuck processing the file for a very long time. This is fixed in version 2.5.1. See Referenced GitHub advisory for more information.
INFO
Published Date :
Jan. 6, 2021, 5:15 p.m.
Last Modified :
Jan. 13, 2021, 3:43 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.1
Public PoC/Exploit Available at Github
CVE-2021-21236 has a 2 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-2021-21236.
| URL | Resource |
|---|---|
| https://github.com/Kozea/CairoSVG/commit/cfc9175e590531d90384aa88845052de53d94bf3 | Patch Third Party Advisory |
| https://github.com/Kozea/CairoSVG/releases/tag/2.5.1 | Release Notes Third Party Advisory |
| https://github.com/Kozea/CairoSVG/security/advisories/GHSA-hq37-853p-g5cf | Exploit Third Party Advisory |
| https://pypi.org/project/CairoSVG/ | Product 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 JavaScript C#
Find regular expressions which are vulnerable to ReDoS (Regular Expression Denial of Service)
Python JavaScript C#
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21236 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21236 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 -
Initial Analysis by [email protected]
Jan. 13, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/Kozea/CairoSVG/commit/cfc9175e590531d90384aa88845052de53d94bf3 No Types Assigned https://github.com/Kozea/CairoSVG/commit/cfc9175e590531d90384aa88845052de53d94bf3 Patch, Third Party Advisory Changed Reference Type https://github.com/Kozea/CairoSVG/releases/tag/2.5.1 No Types Assigned https://github.com/Kozea/CairoSVG/releases/tag/2.5.1 Release Notes, Third Party Advisory Changed Reference Type https://github.com/Kozea/CairoSVG/security/advisories/GHSA-hq37-853p-g5cf No Types Assigned https://github.com/Kozea/CairoSVG/security/advisories/GHSA-hq37-853p-g5cf Exploit, Third Party Advisory Changed Reference Type https://pypi.org/project/CairoSVG/ No Types Assigned https://pypi.org/project/CairoSVG/ Product, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:courtbouillon:cairosvg:*:*:*:*:*:*:*:* versions up to (excluding) 2.5.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21236 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-2021-21236
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.13 }} 0.01%
score
0.48041
percentile