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MathJax Regular expression Denial of Service (ReDoS)

High severity GitHub Reviewed Published Aug 29, 2023 to the GitHub Advisory Database • Updated Jan 31, 2024

Package

npm mathjax (npm)

Affected versions

<= 2.7.9

Patched versions

None

Description

Mathjax up to v2.7.9 was discovered to contain two Regular expression Denial of Service (ReDoS) vulnerabilities in MathJax.js via the components pattern and markdownPattern. NOTE: the vendor disputes this because the regular expressions are not applied to user input; thus, there is no risk.

References

Published by the National Vulnerability Database Aug 29, 2023
Published to the GitHub Advisory Database Aug 29, 2023
Reviewed Jan 31, 2024
Last updated Jan 31, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.063%
(29th percentile)

Weaknesses

CVE ID

CVE-2023-39663

GHSA ID

GHSA-v638-q856-grg8

Source code

No known source code
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