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Authentication cache in Active Directory Jenkins Plugin allows logging in with any password

Critical severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Dec 14, 2023

Package

maven org.jenkins-ci.plugins:active-directory (Maven)

Affected versions

>= 2.17, < 2.20
< 2.16.1

Patched versions

2.20
2.16.1

Description

Jenkins Active Directory Plugin implements two separate modes: Integration with ADSI on Windows, and an OS agnostic LDAP-based mode. Optionally, to reduce lookup time, a cache can be configured to remember user lookups and user authentications.

In Active Directory Plugin prior to 2.20 and 2.16.1, when run in Windows/ADSI mode, the provided password was not used when looking up an applicable cache entry. This allows attackers to log in as any user using any password while a successful authentication of that user is still in the cache.

As a workaround for this issue, the cache can be disabled.

Active Directory Plugin 2.20 and 2.16.1 includes the provided password in cache entry lookup.

Additionally, the Java system property hudson.plugins.active_directory.CacheUtil.noCacheAuth can be set to true to no longer cache user authentications.

References

Published by the National Vulnerability Database Nov 4, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Sep 8, 2022
Last updated Dec 14, 2023

Severity

Critical

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
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.222%
(61st percentile)

Weaknesses

CVE ID

CVE-2020-2301

GHSA ID

GHSA-954f-xw44-56r2

Source code

Credits

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