CVE-2021-21623
First published: Thu Mar 18 2021(Updated: )
A flaw was found in Jenkins Matrix Authorization Strategy Plugin. The jenkins plugin does not correctly perform permission checks, as consequences this allows attackers with Item/Read permission on nested items to access them, even if they lack Item/Read permission for parent folders. The highest threat from this vulnerability is to data confidentiality.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/matrix-auth | <2.6.6 | 2.6.6 |
| redhat/jenkins | <0:2.289.1.1624020353-1.el8 | 0:2.289.1.1624020353-1.el8 |
| Jenkins Matrix Authorization Strategy | <=2.6.5 | |
| maven/org.jenkins-ci.plugins:matrix-auth | <=2.6.5 | 2.6.6 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2021-21623
- https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-2180
- http://www.openwall.com/lists/oss-security/2021/03/18/5
- https://github.com/jenkinsci/matrix-auth-plugin/commit/bbe358575155912b818ab3c6e8b9623f21ad3418
- https://github.com/advisories/GHSA-96jw-3xw4-mq9p (Advisory)
- https://www.jenkins.io/security/advisory/2021-03-18/
- https://access.redhat.com/errata/RHSA-2021:2437
- https://access.redhat.com/security/cve/cve-2021-21623
- https://bugzilla.redhat.com/show_bug.cgi?id=1940489
- https://www.cve.org/CVERecord?id=CVE-2021-21623 https://nvd.nist.gov/vuln/detail/CVE-2021-21623 https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-2180
Frequently Asked Questions
What is the severity of CVE-2021-21623?
CVE-2021-21623 has been classified as a medium severity vulnerability due to improper permission checks in the Jenkins Matrix Authorization Strategy Plugin.
How do I fix CVE-2021-21623?
To fix CVE-2021-21623, upgrade the Jenkins Matrix Authorization Strategy Plugin to version 2.6.6 or higher.
What are the potential impacts of CVE-2021-21623?
The impact of CVE-2021-21623 allows attackers with Item/Read permission on nested items to access them without having Item/Read permission for parent folders.
Which versions are affected by CVE-2021-21623?
CVE-2021-21623 affects versions of Jenkins Matrix Authorization Strategy Plugin up to and including 2.6.5.
Is CVE-2021-21623 related to any specific Jenkins installation?
Yes, CVE-2021-21623 specifically impacts installations of Jenkins that use the Matrix Authorization Strategy Plugin.
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