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fast-xml-parser vulnerable to ReDOS at currency parsing

High severity GitHub Reviewed Published Jul 28, 2024 in NaturalIntelligence/fast-xml-parser • Updated Aug 8, 2024

Package

npm fast-xml-parser (npm)

Affected versions

< 4.4.1

Patched versions

4.4.1

Description

Summary

A ReDOS exists on currency.js was discovered by Gauss Security Labs R&D team.

Details

https://github.com/NaturalIntelligence/fast-xml-parser/blob/master/src/v5/valueParsers/currency.js#L10
contains a vulnerable regex

PoC

pass the following string '\t'.repeat(13337) + '.'

Impact

Denial of service during currency parsing in experimental version 5 of fast-xml-parser-library

https://gauss-security.com

References

@amitguptagwl amitguptagwl published to NaturalIntelligence/fast-xml-parser Jul 28, 2024
Published by the National Vulnerability Database Jul 29, 2024
Published to the GitHub Advisory Database Jul 29, 2024
Reviewed Jul 29, 2024
Last updated Aug 8, 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

0.045%
(16th percentile)

Weaknesses

CVE ID

CVE-2024-41818

GHSA ID

GHSA-mpg4-rc92-vx8v

Source code

Credits

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