CVE-2021-21236 Regular Expression Denial of Service in CairoSVG

2021-01-0617:00:19

CWE-400

GitHub_M

www.cve.org

cairosvg

python package

svg converter

regular expression denial of service

cve-2021-21236

CVSS3

5.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

AI Score

5.9

Confidence

High

EPSS

0.001

Percentile

48.7%

JSON

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.

CNA Affected

[
  {
    "product": "CairoSVG",
    "vendor": "Kozea",
    "versions": [
      {
        "status": "affected",
        "version": "< 2.5.1"
      }
    ]
  }
]