CVE-2018-1002102: Kubernetes API server follows unvalidated redirects from streaming Kubelet endpoints
First published: Wed Sep 26 2018(Updated: )
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.
Credit: jordan@liggitt.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Kubernetes Kubernetes | >=1.10.0<=1.13.13 | |
| Kubernetes Kubernetes | =1.14.0-alpha0 | |
| Kubernetes Kubernetes | =1.14.0-alpha1 | |
| Fedoraproject Fedora | =31 | |
| redhat/atomic-openshift | <0:3.11.346-1.git.0.ea10721.el7 | 0:3.11.346-1.git.0.ea10721.el7 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2018-1002102 https://nvd.nist.gov/vuln/detail/CVE-2018-1002102
- https://bugzilla.redhat.com/show_bug.cgi?id=1784602
- https://access.redhat.com/errata/RHSA-2020:5363
- https://access.redhat.com/security/cve/cve-2018-1002102
- https://github.com/kubernetes/kubernetes/issues/85867
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Q56CULSH7F7BC4NPS67ZS23ZCLL5TIVK/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1784603
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1784604
- https://github.com/openshift/origin/commit/efc7e25e7d1475b7c0c6caa74093cdad64d467e9
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Q56CULSH7F7BC4NPS67ZS23ZCLL5TIVK/
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2018-1002102.
What is the severity of CVE-2018-1002102?
The severity of CVE-2018-1002102 is low with a severity value of 2.6.
What is affected by CVE-2018-1002102?
Kubernetes API server versions prior to v1.14.0 are affected by CVE-2018-1002102.
How can an attacker exploit CVE-2018-1002102?
An attacker-controlled Kubelet can redirect API server requests from streaming endpoints to arbitrary hosts.
How can CVE-2018-1002102 be fixed?
To fix CVE-2018-1002102, update the Kubernetes API server to version 1.14.0 or higher.
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