CVE-2018-1002102

Kubernetes API server follows unvalidated redirects from streaming Kubelet endpoints

Description

Improper validation of URL redirection in the Kubernetes API server in versions prior to v1.14.0 allows an attacker-controlled Kubelet to redirect API server requests from streaming endpoints to arbitrary hosts. Impacted API servers will follow the redirect as a GET request with client-certificate credentials for authenticating to the Kubelet.

Remediation

Workaround:

  • For Kubernetes versions >= v1.10.0, the ValidateProxyRedirects feature can be manually enabled with the kube-apiserver flag --feature-gates=ValidateProxyRedirects=true

Category

2.6
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.28%
Vendor Advisory fedoraproject.org
Affected: Kubernetes Kubernetes
Published at:
Updated at:

References

Link Tags
https://github.com/kubernetes/kubernetes/issues/85867 issue tracking third party advisory mitigation
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q56CULSH7F7BC4NPS67ZS23ZCLL5TIVK/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-1002102?
CVE-2018-1002102 has been scored as a low severity vulnerability.
How to fix CVE-2018-1002102?
As a workaround for remediating CVE-2018-1002102: For Kubernetes versions >= v1.10.0, the ValidateProxyRedirects feature can be manually enabled with the kube-apiserver flag --feature-gates=ValidateProxyRedirects=true
Is CVE-2018-1002102 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-1002102 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-1002102?
CVE-2018-1002102 affects Kubernetes Kubernetes.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.