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RubyGems vulnerable to Deserialization of Untrusted Data

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

Package

bundler rubygems-update (RubyGems)

Affected versions

>= 2.0.0, < 2.6.14

Patched versions

2.6.14

Description

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution. The issue has been patched in 2.6.14.

References

Published by the National Vulnerability Database Oct 11, 2017
Published to the GitHub Advisory Database May 13, 2022
Reviewed Mar 9, 2023
Last updated Mar 9, 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

13.505%
(96th percentile)

Weaknesses

CVE ID

CVE-2017-0903

GHSA ID

GHSA-mqwr-4qf2-2hcv

Source code

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