Improper Authentication (empty password) in Jenkins Active Directory Plugin

CVE-2020-2300 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Jenkins Active Directory Plugin implements two separate modes: Integration with ADSI on Windows, and an OS agnostic LDAP-based mode.

The Windows/ADSI mode does not specifically prohibit use of empty passwords in Active Directory Plugin prior to 2.20 and 2.16.1. If the Active Directory server allows the unauthenticated bind operation, this allows attackers to log in to Jenkins as any user by providing an empty password.

Jenkins Active Directory Plugin 2.20 and 2.16.1 prohibits the use of an empty password to log in.

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
—
Source code
Browse source ↗
Published (advisory)
2022-05-24 17:33:07 UTC
Updated
2023-12-20 14:32:31 UTC
GitHub reviewed
2022-09-08 00:45:01 UTC
NVD published
2020-11-04

EPSS Score

Score Percentile
0.19% 41.28%

CVSS Scores

Base score Version Severity Vector
9.8 3.1 —
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type Value
GHSA GHSA-8wcw-cw2f-h4g2 ↗
CVE CVE-2020-2300 ↗

CWEs

CWE id Name
CWE-287 Improper Authentication

Credits

  • westonsteimel (analyst)
  • NotMyFault (analyst)

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven org.jenkins-ci.plugins:active-directory >= 2.17, < 2.20 2.20 —
maven org.jenkins-ci.plugins:active-directory < 2.16.1 2.16.1 —

References

cvelogic Threat Intelligence