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Nokogiri Implements libxml2 version vulnerable to use-after-free

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jul 19, 2023

Package

bundler nokogiri (RubyGems)

Affected versions

< 1.11.4

Patched versions

1.11.4

Description

There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

References

Published by the National Vulnerability Database May 18, 2021
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jul 5, 2023
Last updated Jul 19, 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
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
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:R/S:U/C:H/I:H/A:H

EPSS score

0.641%
(79th percentile)

Weaknesses

CVE ID

CVE-2021-3518

GHSA ID

GHSA-v4f8-2847-rwm7

Source code

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