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Nokogiri does not forbid namespace nodes in XPointer ranges

Critical severity GitHub Reviewed Published Aug 21, 2018 to the GitHub Advisory Database • Updated Nov 6, 2023

Package

bundler nokogiri (RubyGems)

Affected versions

< 1.7.1

Patched versions

1.7.1

Description

xpointer.c in libxml2 before 2.9.5 (as used in nokogiri before 1.7.1 amongst other products) does not forbid namespace nodes in XPointer ranges, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and memory corruption) via a crafted XML document.

References

Published by the National Vulnerability Database Sep 25, 2016
Published to the GitHub Advisory Database Aug 21, 2018
Reviewed Jun 16, 2020
Last updated Nov 6, 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

1.965%
(89th percentile)

Weaknesses

CVE ID

CVE-2016-4658

GHSA ID

GHSA-fr52-4hqw-p27f

Source code

No known source code
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