Bug 1914714 (CVE-2020-35514)
| Summary: | CVE-2020-35514 openshift/machine-config-operator: /etc/kubernetes/kubeconfig is given incorrect privileges | ||
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| Product: | [Other] Security Response | Reporter: | Mark Cooper <mcooper> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | amurdaca, bmontgom, eparis, jburrell, jokerman, nstielau, sponnaga |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
An insecure modification flaw in the /etc/kubernetes/kubeconfig file was found in OpenShift. This flaw allows an attacker with access to a running container which mounts /etc/kubernetes or has local access to the node, to copy this kubeconfig file and attempt to add their own node to the OpenShift cluster. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-10-28 01:45:08 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1895030 | ||
| Bug Blocks: | 1895465 | ||
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Description
Mark Cooper
2021-01-11 01:24:23 UTC
Acknowledgments: Name: Juan Osorio Robles (Red Hat) Upstream fix/work in progress: https://github.com/openshift/machine-config-operator/pull/2202 Statement: The kubeconfig file on the node is that of the bootstrap certificate. This means that to successfully exploit this vulnerability, the kubeconfig file must be taken and used within the first 24 hours of creation as it is created with a short expiration time. Otherwise, attempting to use the credentials after this time will result in the following: `Failed while requesting a signed certificate from the master: cannot create certificate signing request: Unauthorized` Further, if taken, the certificate signing request (CSR) of the joining rogue OpenShift node is not automatically approved by default. The node still needs to be approved through the use of the commands `oc get csr` and `oc adm certificate approve`. closing old flaw bug |