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Regular expression Denial of Service in @progfay/scrapbox-parser

Moderate severity GitHub Reviewed Published Feb 19, 2021 in progfay/scrapbox-parser • Updated Feb 1, 2023

Package

npm @progfay/scrapbox-parser (npm)

Affected versions

< 6.0.3
>= 7.0.0, < 7.0.2

Patched versions

6.0.3
7.0.2

Description

Impact

A Regular expression Denial of Service flaw was found in the @progfay/scrapbox-parser package before 6.0.3, 7.0.2 for Node.js.
The attacker that is able to be parsed a specially crafted text may cause the application to consume an excessive amount of CPU.

Patches

Upgrade to version 6.0.3, 7.0.2 or later.

Workarounds

Avoid to parse text with a lot of [ chars.

References

For more information

If you have any questions or comments about this advisory:

References

Published by the National Vulnerability Database Feb 19, 2021
@progfay progfay published to progfay/scrapbox-parser Feb 19, 2021
Reviewed Feb 26, 2021
Published to the GitHub Advisory Database Mar 1, 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
Low
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:L/UI:N/S:U/C:N/I:N/A:L

EPSS score

0.180%
(56th percentile)

Weaknesses

CVE ID

CVE-2021-27405

GHSA ID

GHSA-9fhw-r42p-5c7r

Source code

No known source code

Credits

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