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RubyGems Link Following vulnerability

High severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Mar 9, 2023

Package

maven org.jruby:jruby-stdlib (Maven)

Affected versions

< 9.1.16.0

Patched versions

9.1.16.0
bundler rubygems-update (RubyGems)
< 2.7.6
2.7.6

Description

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Directory Traversal vulnerability in install_location function of package.rb that can result in path traversal when writing to a symlinked basedir outside of the root. This vulnerability appears to have been fixed in 2.7.6.

References

Published by the National Vulnerability Database Mar 13, 2018
Published to the GitHub Advisory Database May 13, 2022
Reviewed Mar 8, 2023
Last updated Mar 9, 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
High
Integrity
None
Availability
None

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:N/A:N

EPSS score

0.553%
(78th percentile)

Weaknesses

CVE ID

CVE-2018-1000073

GHSA ID

GHSA-gx69-6cp4-hxrj

Source code

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