Vulnerability CVE-2021-21236


Published: 2021-01-06

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.

Type:

CWE-400

(Uncontrolled Resource Consumption ('Resource Exhaustion'))

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Courtbouillon -> Cairosvg 

 References:
https://github.com/Kozea/CairoSVG/commit/cfc9175e590531d90384aa88845052de53d94bf3
https://github.com/Kozea/CairoSVG/releases/tag/2.5.1
https://github.com/Kozea/CairoSVG/security/advisories/GHSA-hq37-853p-g5cf
https://pypi.org/project/CairoSVG/

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