CVE-2021-21640: Input Validation
First published: Wed Apr 07 2021(Updated: )
A flaw was found in Jenkins. Due to lack of validation of the newly created view name, an attackers with View/Create permission are allowed to create views with invalid or already-used names.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/jenkins | <0:2.277.3.1620393611-1.el8 | 0:2.277.3.1620393611-1.el8 |
| redhat/jenkins | <0:2.289.1.1624020353-1.el8 | 0:2.289.1.1624020353-1.el8 |
| Jenkins Jenkins | <=2.277.1 | |
| Jenkins Jenkins | <=2.286 | |
| maven/org.jenkins-ci.main:jenkins-core | <2.277.2 | 2.277.2 |
| maven/org.jenkins-ci.main:jenkins-core | >=2.278<=2.286 | 2.287 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2021-21640
- https://www.jenkins.io/security/advisory/2021-04-07/#SECURITY-1871
- http://www.openwall.com/lists/oss-security/2021/04/07/2
- https://github.com/jenkinsci/jenkins/commit/42e2c74049ddf5e0aca1fe6aadc7b24fdabb5494
- https://github.com/advisories/GHSA-w2hv-rcqr-2h7r (Advisory)
- https://access.redhat.com/errata/RHSA-2021:2437
- https://access.redhat.com/security/cve/cve-2021-21640
- https://bugzilla.redhat.com/show_bug.cgi?id=1947105
- https://www.cve.org/CVERecord?id=CVE-2021-21640 https://nvd.nist.gov/vuln/detail/CVE-2021-21640
- https://access.redhat.com/errata/RHSA-2021:1551
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-21640.
What is the severity of CVE-2021-21640?
The severity of CVE-2021-21640 is medium (severity value: 4).
What is the description of CVE-2021-21640?
CVE-2021-21640 is a vulnerability in Jenkins that allows attackers with View/Create permission to create views with invalid or already-used names due to lack of validation of the newly created view name.
How does CVE-2021-21640 affect Jenkins?
CVE-2021-21640 affects Jenkins versions 2.286 and earlier, LTS 2.277.1 and earlier.
How can I fix CVE-2021-21640?
To fix CVE-2021-21640, update Jenkins to version 2.287 or LTS 2.277.2 or newer.
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