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PgHero gem allows CSRF

High severity GitHub Reviewed Published Aug 5, 2020 to the GitHub Advisory Database • Updated Aug 25, 2023

Package

bundler pghero (RubyGems)

Affected versions

< 2.7.0

Patched versions

2.7.0

Description

The PgHero gem through 2.6.0 for Ruby allows CSRF. PgHero normally uses the protect_from_forgery method from Rails to prevent CSRF. However, this defaults to :null_session, which has no effect on non-session based authentication methods. Thus the ruby gem is vulnerable with non-session based authentication methods like basic authentication.

References

Reviewed Aug 5, 2020
Published to the GitHub Advisory Database Aug 5, 2020
Last updated Aug 25, 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
Required
Scope
Unchanged
Confidentiality
None
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

EPSS score

0.069%
(31st percentile)

Weaknesses

CVE ID

CVE-2020-16253

GHSA ID

GHSA-v6fx-752r-ccp2

Source code

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