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Luxon Inefficient Regular Expression Complexity vulnerability

High severity GitHub Reviewed Published Jan 4, 2023 in moment/luxon • Updated Feb 12, 2024

Package

npm luxon (npm)

Affected versions

>= 2.0.0, < 2.5.2
>= 3.0.0, < 3.2.1
>= 1.0.0, < 1.28.1

Patched versions

2.5.2
3.2.1
1.28.1

Description

Impact

Luxon's `DateTime.fromRFC2822() has quadratic (N^2) complexity on some specific inputs. This causes a noticeable slowdown for inputs with lengths above 10k characters. Users providing untrusted data to this method are therefore vulnerable to (Re)DoS attacks.

This is the same bug as Moment's GHSA-wc69-rhjr-hc9g

Workarounds

Limit the length of the input.

References

There is an excellent writeup of the same issue in Moment: moment/moment#6015 (comment)

Details

DateTime.fromRFC2822("(".repeat(500000)) takes a couple minutes to complete.

References

@icambron icambron published to moment/luxon Jan 4, 2023
Published by the National Vulnerability Database Jan 4, 2023
Published to the GitHub Advisory Database Jan 9, 2023
Reviewed Jan 9, 2023
Last updated Feb 12, 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

0.286%
(68th percentile)

Weaknesses

CVE ID

CVE-2023-22467

GHSA ID

GHSA-3xq5-wjfh-ppjc

Source code

Credits

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