CVE-2021-20218
Last modified
CVE-2021-20218 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A flaw was found in the fabric8 kubernetes-client in version 4.2.0 and after. This flaw allows a malicious pod/container to cause applications using the fabric8 kubernetes-client `copy` command to extract files outside the working path. EPSS estimates a 1.31% chance of exploitation in the next 30 days.
Description
A flaw was found in the fabric8 kubernetes-client in version 4.2.0 and after. This flaw allows a malicious pod/container to cause applications using the fabric8 kubernetes-client `copy` command to extract files outside the working path. The highest threat from this vulnerability is to integrity and system availability. This has been fixed in kubernetes-client-4.13.2 kubernetes-client-5.0.2 kubernetes-client-4.11.2 kubernetes-client-4.7.2
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Kubernetes-Client | >= 4.2.0, < 4.7.2 |
| Redhat | Kubernetes-Client | >= 4.8.0, < 4.11.2 |
| Redhat | Kubernetes-Client | >= 4.12.0, < 4.13.2 |
| Redhat | Kubernetes-Client | >= 5.0.0, < 5.0.2 |
| Redhat | A-Mq Online | All versions |
| Redhat | Build Of Quarkus | All versions |
| Redhat | Codeready Studio | 12.0 |
| Redhat | Descision Manager | 7.0 |
| Redhat | Integration Camel K | All versions |
| Redhat | Jboss Fuse | 7.0.0 |
| Redhat | Openshift Container Platform | 3.11 |
| Redhat | Process Automation | 7.0 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1923405Issue Tracking, Vendor Advisory
- https://github.com/fabric8io/kubernetes-client/issues/2715Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1923405Issue Tracking, Vendor Advisory
- https://github.com/fabric8io/kubernetes-client/issues/2715Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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