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v8n vulnerable to Inefficient Regular Expression Complexity

High severity GitHub Reviewed Published Jul 26, 2022 in imbrn/v8n • Updated Jul 31, 2023

Package

npm v8n (npm)

Affected versions

< 1.5.1

Patched versions

1.5.1

Description

Impact

Inefficient regular expression complexity of lowercase() and uppercase() regex could lead to a denial of service attack. With a formed payload 'a' + 'a'.repeat(i) + 'A', only 32 characters payload could take 29443 ms time execution when testing lowercase(). The same issue happens with uppercase().

Patches

v1.5.1

References

huntr.dev report
Regular Expression Denial of Service (ReDoS) and Catastrophic Backtracking

For more information

If you have any questions or comments about this advisory:

References

@imbrn imbrn published to imbrn/v8n Jul 26, 2022
Published by the National Vulnerability Database Aug 2, 2022
Published to the GitHub Advisory Database Oct 7, 2022
Reviewed Oct 7, 2022
Last updated Jul 31, 2023

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

0.182%
(57th percentile)

Weaknesses

CVE ID

CVE-2022-35923

GHSA ID

GHSA-xrx9-gj26-5wx9

Source code

Credits

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