CVE-2021-21639
MEDIUM4.3EPSS 0.70%Lack of type validation in agent related REST API in Jenkins
Published: 5/24/2022Modified: 4/3/2025
Description
Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not validate the type of object created after loading the data submitted to the `config.xml` REST API endpoint of a node, allowing attackers with Computer/Configure permission to replace a node with one of a different type.
Affected packages (2)
- Bitnami/jenkinsfrom 0, < 2.286.1
- Maven/org.jenkins-ci.main:jenkins-corefrom 0, < 2.277.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-21639
- PATCHhttps://github.com/jenkinsci/jenkins
- WEBhttps://github.com/jenkinsci/jenkins/commit/84210baed0c866bdee3e59271f98a767a14a5509
- WEBhttps://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1721
- WEBhttp://www.openwall.com/lists/oss-security/2021/04/07/2