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Uncontrolled resource consumption in nokogiri

Moderate severity GitHub Reviewed Published Apr 13, 2018 to the GitHub Advisory Database • Updated May 4, 2023

Package

bundler nokogiri (RubyGems)

Affected versions

< 1.8.2

Patched versions

1.8.2

Description

The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.

References

Published by the National Vulnerability Database Apr 8, 2018
Published to the GitHub Advisory Database Apr 13, 2018
Reviewed Jun 16, 2020
Last updated May 4, 2023

Severity

Moderate

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

EPSS score

1.726%
(88th percentile)

Weaknesses

CVE ID

CVE-2017-18258

GHSA ID

GHSA-882p-jqgm-f45g

Source code

No known source code
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