CVE-2021-21690: Path Traversal
First published: Thu Nov 04 2021(Updated: )
Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
Credit: jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com jenkinsci-cert@googlegroups.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Jenkins Jenkins | <2.303.3 | |
| Jenkins Jenkins | <2.319 | |
| redhat/jenkins | <2.319 | 2.319 |
| redhat/jenkins LTS | <2.303.3 | 2.303.3 |
| maven/org.jenkins-ci.main:jenkins-core | <=2.303.2 | 2.303.3 |
| maven/org.jenkins-ci.main:jenkins-core | >=2.304<=2.318 | 2.319 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2021-21690
- https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455
- https://github.com/jenkinsci/jenkins/commit/104c751d907919dd53f5090f84d53c671a66457b
- https://github.com/jenkinsci/jenkins/commit/5a245e42979abe4a26d41727c839521e36cedd74
- https://github.com/jenkinsci/jenkins/commit/63cde2daadc705edf086f2213b48c8c547f98358
- https://github.com/advisories/GHSA-97c3-w9cr-6qc2 (Advisory)
- https://access.redhat.com/errata/RHSA-2021:4833
- https://access.redhat.com/errata/RHSA-2021:4829
- https://access.redhat.com/errata/RHSA-2021:4801
- https://access.redhat.com/errata/RHSA-2021:4799
- https://access.redhat.com/errata/RHSA-2021:4827
- https://access.redhat.com/security/cve/cve-2021-21690
- https://bugzilla.redhat.com/show_bug.cgi?id=2020336
Frequently Asked Questions
What is CVE-2021-21690?
CVE-2021-21690 is a vulnerability that allows agent processes to bypass file path filtering in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
What is the severity of CVE-2021-21690?
CVE-2021-21690 has a severity level of 9.8 (Critical).
How can the CVE-2021-21690 vulnerability be fixed?
The CVE-2021-21690 vulnerability can be fixed by updating Jenkins to version 2.319 or Jenkins LTS to version 2.303.3.
Where can I find more information about CVE-2021-21690?
You can find more information about CVE-2021-21690 on the Jenkins security advisory page (https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455) and the Red Hat errata pages (https://access.redhat.com/errata/RHSA-2021:4833, https://access.redhat.com/errata/RHSA-2021:4829).
What is the CWE for CVE-2021-21690?
The CWE for CVE-2021-21690 is CWE-693.
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