CVE-2021-4178
MEDIUMCVSS 6.7/10EPSS 0.31%
Last modified
CVE-2021-4178 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. A arbitrary code execution flaw was found in the Fabric 8 Kubernetes client affecting versions 5.0.0-beta-1 and above. Due to an improperly configured YAML parsing, this will allow a local and privileged attacker to supply malicious YAML.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
Description
A arbitrary code execution flaw was found in the Fabric 8 Kubernetes client affecting versions 5.0.0-beta-1 and above. Due to an improperly configured YAML parsing, this will allow a local and privileged attacker to supply malicious YAML.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Redhat | Fabric8-Kubernetes | >= 5.0.1, < 5.0.3 | — |
| Redhat | Fabric8-Kubernetes | >= 5.1.0, < 5.1.2 | — |
| Redhat | Fabric8-Kubernetes | >= 5.2.0, < 5.3.2 | — |
| Redhat | Fabric8-Kubernetes | >= 5.5.0, < 5.7.4 | — |
| Redhat | Fabric8-Kubernetes | >= 5.9.0, < 5.10.2 | — |
| Redhat | Fabric8-Kubernetes | >= 5.11.0, < 5.11.2 | — |
| Redhat | Fabric8-Kubernetes | 5.0.0 | Beta1 |
| Redhat | Fabric8-Kubernetes | 5.8.0 | — |
| Redhat | A-Mq Streams | 2.0.1 | — |
| Redhat | Build Of Quarkus | 2.2.5 | — |
| Redhat | Descision Manager | 7.0 | — |
| Redhat | Fuse | 7.11 | — |
| Redhat | Integration Camel K | All versions | — |
| Redhat | Integration Camel Quarkus | 2.2.1 | — |
| Redhat | Openshift Application Runtimes | All versions | — |
| Redhat | Process Automation | 7.0 | — |
References
- https://access.redhat.com/security/cve/CVE-2021-4178Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034388Issue Tracking, Vendor Advisory
- https://github.com/advisories/GHSA-98g7-rxmf-rrxmThird Party Advisory
- https://github.com/fabric8io/kubernetes-client/issues/3653Issue Tracking, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-4178Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2034388Issue Tracking, Vendor Advisory
- https://github.com/advisories/GHSA-98g7-rxmf-rrxmThird Party Advisory
- https://github.com/fabric8io/kubernetes-client/issues/3653Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-4178?
A arbitrary code execution flaw was found in the Fabric 8 Kubernetes client affecting versions 5.0.0-beta-1 and above. Due to an improperly configured YAML parsing, this will allow a local and privileged attacker to supply malicious YAML.
How severe is CVE-2021-4178?
CVE-2021-4178 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.
How do I fix CVE-2021-4178?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-4178?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST