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RCE vulnerability in Jenkins Yaml Axis Plugin

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Dec 22, 2023

Package

maven org.jenkins-ci.plugins:yaml-axis (Maven)

Affected versions

<= 0.2.0

Patched versions

0.2.1

Description

Yaml Axis Plugin 0.2.0 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types. This results in a remote code execution (RCE) vulnerability exploitable by users able to configure a multi-configuration (Matrix) job, or control the contents of a previously configured job’s SCM repository.

Yaml Axis Plugin 0.2.1 configures its YAML parser to only instantiate safe types.

References

Published by the National Vulnerability Database Apr 16, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Dec 16, 2022
Last updated Dec 22, 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
Low
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:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.793%
(82nd percentile)

Weaknesses

CVE ID

CVE-2020-2179

GHSA ID

GHSA-324h-2v7h-q3xx

Source code

Credits

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