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XXE vulnerability on agents in Jenkins OSF Builder Suite : : XML Linter Plugin

Moderate severity GitHub Reviewed Published Nov 16, 2022 to the GitHub Advisory Database • Updated Jan 31, 2023

Package

maven org.jenkins-ci:update-center2 (Maven)

Affected versions

<= 1.0.2

Patched versions

None

Description

OSF Builder Suite : : XML Linter 1.0.2 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

This allows attackers able to control XML files that get processed by the 'OSF Builder Suite : : XML Linter' build step to have agent processes parse a crafted file that uses external entities for extraction of secrets from the Jenkins agent or server-side request forgery.

Because Jenkins agent processes usually execute build tools whose input (source code, build scripts, etc.) is controlled externally, this vulnerability only has a real impact in very narrow circumstances: when attackers can control XML files, but are unable to change build steps, Jenkinsfiles, test code that gets executed on the agents, or similar.

References

Published by the National Vulnerability Database Nov 15, 2022
Published to the GitHub Advisory Database Nov 16, 2022
Reviewed Nov 21, 2022
Last updated Jan 31, 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
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:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS score

0.221%
(61st percentile)

Weaknesses

CVE ID

CVE-2022-45397

GHSA ID

GHSA-8847-xvjw-9g43

Source code

https://github.com/jenkinsci/osf-builder-suite-xml-linter-plugin

Credits

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