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Regular Expression Denial of Service (REDoS) in Marked

Moderate severity GitHub Reviewed Published Feb 8, 2021 in markedjs/marked • Updated Feb 1, 2023

Package

npm marked (npm)

Affected versions

>= 1.1.1, < 2.0.0

Patched versions

2.0.0

Description

Impact

What kind of vulnerability is it? Who is impacted?

Regular expression Denial of Service

A Denial of Service attack can affect anyone who runs user generated code through marked.

Patches

Has the problem been patched? What versions should users upgrade to?

patched in v2.0.0

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

None.

References

Are there any links users can visit to find out more?

markedjs/marked#1927
https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS

For more information

If you have any questions or comments about this advisory:

References

@UziTech UziTech published to markedjs/marked Feb 8, 2021
Reviewed Feb 8, 2021
Published to the GitHub Advisory Database Feb 8, 2021
Published by the National Vulnerability Database Feb 8, 2021
Last updated Feb 1, 2023

Severity

Moderate

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
Low

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:L

EPSS score

0.186%
(56th percentile)

Weaknesses

CVE ID

CVE-2021-21306

GHSA ID

GHSA-4r62-v4vq-hr96

Source code

No known source code

Credits

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