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Improper Authorization in Jenkins

Moderate severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

maven org.jenkins-ci.main:jenkins-core (Maven)

Affected versions

<= 2.138.1
>= 2.140, <= 2.145

Patched versions

2.138.2
2.146

Description

A denial of service vulnerability exists in Jenkins 2.145 and earlier, LTS 2.138.1 and earlier in core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java that allows attackers without Overall/Read permission to access a specific URL on instances using the built-in Jenkins user database security realm that results in the creation of an ephemeral user record in memory.

References

Published by the National Vulnerability Database Jan 9, 2019
Published to the GitHub Advisory Database May 13, 2022
Reviewed Jun 30, 2022
Last updated Jan 27, 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
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

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:N/I:L/A:L

EPSS score

0.085%
(38th percentile)

Weaknesses

CVE ID

CVE-2018-1000408

GHSA ID

GHSA-4h47-h3cr-23wh

Source code

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