GHSA-4wr9-2xc6-jmg5
Session fixation vulnerability in Jenkins
At a glance
- Published
- Updated
- CVE
- CVE-2021-21671
- Aliases
- BIT-jenkins-2021-21671
- CVSS_V3
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Description
Jenkins 2.299 and earlier, LTS 2.289.1 and earlier does not invalidate the previous session on login. This allows attackers to use social engineering techniques to gain administrator access to Jenkins. This vulnerability was introduced in Jenkins 2.266 and LTS 2.277.1. Jenkins 2.300, LTS 2.289.2 invalidates the previous session on login. In case of problems, administrators can choose a different implementation by setting the [Java system property `hudson.security.SecurityRealm.sessionFixationProtectionMode`](https://www.jenkins.io/doc/book/managing/system-properties/#hudson-security-securityrealm-sessionfixationprotectionmode) to `2`, or disable the fix entirely by setting that system property to `0`.
Affected packages
| Package | Versions |
|---|---|
| Maven · org.jenkins-ci.main:jenkins-core | introduced 2.292, fixed 2.300 |
| Maven · org.jenkins-ci.main:jenkins-core | introduced 0, fixed 2.289.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-21671 ADVISORY
- https://github.com/jenkinsci/jenkins/commit/25a42f3942fd9f8bd768c887c679dbc796b4fcd5 WEB
- https://github.com/jenkinsci/jenkins PACKAGE
- https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2371 WEB
- http://www.openwall.com/lists/oss-security/2021/06/30/1 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |