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Improper Certificate Validation in oauth ruby gem

High severity GitHub Reviewed Published Apr 22, 2021 to the GitHub Advisory Database • Updated Jan 24, 2023

Package

bundler oauth (RubyGems)

Affected versions

< 0.5.5

Patched versions

0.5.5

Description

lib/oauth/consumer.rb in the oauth-ruby gem through 0.5.4 for Ruby does not verify server X.509 certificates if a certificate bundle cannot be found, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information.

References

Published by the National Vulnerability Database Sep 24, 2020
Reviewed Apr 20, 2021
Published to the GitHub Advisory Database Apr 22, 2021
Last updated Jan 24, 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
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS score

0.140%
(50th percentile)

Weaknesses

CVE ID

CVE-2016-11086

GHSA ID

GHSA-7359-3c6r-hfc2

Source code

This advisory has been edited. See History.
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