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Nokogiri Inefficient Regular Expression Complexity

High severity GitHub Reviewed Published Apr 11, 2022 in sparklemotion/nokogiri • Updated Jul 6, 2023

Package

bundler nokogiri (RubyGems)

Affected versions

< 1.13.4

Patched versions

1.13.4

Description

Summary

Nokogiri < v1.13.4 contains an inefficient regular expression that is susceptible to excessive backtracking when attempting to detect encoding in HTML documents.

Mitigation

Upgrade to Nokogiri >= 1.13.4.

Severity

The Nokogiri maintainers have evaluated this as High Severity 7.5 (CVSS3.1).

References

CWE-1333 Inefficient Regular Expression Complexity

Credit

This vulnerability was reported by HackerOne user ooooooo_q (ななおく).

References

@flavorjones flavorjones published to sparklemotion/nokogiri Apr 11, 2022
Published to the GitHub Advisory Database Apr 11, 2022
Reviewed Apr 11, 2022
Published by the National Vulnerability Database Apr 11, 2022
Last updated Jul 6, 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

1.689%
(87th percentile)

Weaknesses

CVE ID

CVE-2022-24836

GHSA ID

GHSA-crjr-9rc5-ghw8

Source code

Credits

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