CVE-2021-21670
First published: Wed Jun 30 2021(Updated: )
Incorrect Authorization vulnerability was found in Jenkins. Users with Item/Cancel permission are able to cancel queue items and abort builds of jobs even when they do not have Item/Read permission.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/jenkins | <0:2.289.2.1629437819-1.el8 | 0:2.289.2.1629437819-1.el8 |
| redhat/jenkins | <0:2.289.2.1628252553-1.el8 | 0:2.289.2.1628252553-1.el8 |
| redhat/jenkins | <0:2.289.3.1633554819-1.el8 | 0:2.289.3.1633554819-1.el8 |
| Jenkins Jenkins | <2.289.2 | |
| Jenkins Jenkins | <2.300 | |
| maven/org.jenkins-ci.main:jenkins-core | >=2.292<=2.299 | 2.300 |
| maven/org.jenkins-ci.main:jenkins-core | <=2.289.1 | 2.289.2 |
Remedy
As a workaround on earlier versions of Jenkins, do not grant Item/Cancel permission to users who do not have Item/Read permission.
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2021-21670
- https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2278
- http://www.openwall.com/lists/oss-security/2021/06/30/1
- https://github.com/jenkinsci/jenkins/commit/86b7d7e789586575522650c60d591605facb1d70
- https://github.com/advisories/GHSA-q4wp-8c99-69pw (Advisory)
- https://access.redhat.com/errata/RHSA-2021:3820
- https://access.redhat.com/security/cve/cve-2021-21670
- https://bugzilla.redhat.com/show_bug.cgi?id=2007749
- https://www.cve.org/CVERecord?id=CVE-2021-21670 https://nvd.nist.gov/vuln/detail/CVE-2021-21670 https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2278
- https://access.redhat.com/errata/RHBA-2021:3396
- https://access.redhat.com/errata/RHBA-2021:3033
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID for this Jenkins vulnerability?
The vulnerability ID for this Jenkins vulnerability is CVE-2021-21670.
What is the severity of CVE-2021-21670?
The severity of CVE-2021-21670 is medium.
How does CVE-2021-21670 affect Jenkins?
CVE-2021-21670 allows users to cancel queue items and abort builds of jobs for which they have Item/Cancel permission, even without Item/Read permission.
How can I fix CVE-2021-21670 in Jenkins?
To fix CVE-2021-21670 in Jenkins, update to version 2.289.2 or later for Jenkins LTS or version 2.300 or later for Jenkins.
Where can I find more information about CVE-2021-21670?
More information about CVE-2021-21670 can be found at the following references: [Jenkins Security Advisory](https://www.jenkins.io/security/advisory/2021-06-30/#SECURITY-2278), [Openwall Mailing List](http://www.openwall.com/lists/oss-security/2021/06/30/1), [Red Hat Advisory](https://access.redhat.com/errata/RHSA-2021:3820).
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