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Nokogiri vulnerable to libxslt protection mechanism bypass

Critical severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Mar 14, 2023

Package

bundler nokogiri (RubyGems)

Affected versions

< 1.10.3

Patched versions

1.10.3

Description

A dependency of Nokogiri, libxslt through 1.1.33 allows bypass of a protection mechanism because callers of xsltCheckRead and xsltCheckWrite permit access even upon receiving a -1 error code. xsltCheckRead can return -1 for a crafted URL that is not actually invalid and is subsequently loaded.

References

Published by the National Vulnerability Database Apr 10, 2019
Published to the GitHub Advisory Database May 13, 2022
Reviewed Mar 9, 2023
Last updated Mar 14, 2023

Severity

Critical

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
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.275%
(69th percentile)

Weaknesses

No CWEs

CVE ID

CVE-2019-11068

GHSA ID

GHSA-qxcg-xjjg-66mj

Source code

No known source code
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