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

Moderate
progfay published GHSA-9fhw-r42p-5c7r Feb 19, 2021

Package

npm @progfay/scrapbox-parser (npm)

Affected versions

< 6.0.3, < 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:

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

CVE ID

CVE-2021-27405

Weaknesses

Credits