CVE-2023-3893: Kubernetes - csi-proxy - Insufficient input sanitization leads to privilege escalation
First published: Wed Aug 23 2023(Updated: )
A security issue was discovered in Kubernetes where a user that can create pods on Windows nodes running kubernetes-csi-proxy may be able to escalate to admin privileges on those nodes. Kubernetes clusters are only affected if they include Windows nodes running kubernetes-csi-proxy.
Credit: jordan@liggitt.net jordan@liggitt.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Kubernetes Csi Proxy | <=1.1.2 | |
| Kubernetes Csi Proxy | =2.0.0-alpha0 | |
| go/github.com/kubernetes-csi/csi-proxy | <=1.1.2 | 1.1.3 |
| go/github.com/kubernetes-csi/csi-proxy | =2.0.0-alpha.0 | 2.0.0-alpha.1 |
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Reference Links
- https://github.com/kubernetes/kubernetes/issues/119594
- https://groups.google.com/g/kubernetes-security-announce/c/lWksE2BoCyQ
- https://security.netapp.com/advisory/ntap-20231221-0004/
- https://nvd.nist.gov/vuln/detail/CVE-2023-3893
- https://github.com/kubernetes-csi/csi-proxy/commit/0e83a68159111e4ee510f5aa56d47ba97bda60c7
- https://github.com/kubernetes-csi/csi-proxy/commit/2523e6674dedf3de27f84235efec28555da24664
- https://github.com/advisories/GHSA-r6cc-7wj7-gfx2 (Advisory)
Frequently Asked Questions
What is CVE-2023-3893?
CVE-2023-3893 is a vulnerability in Kubernetes where a user can escalate to admin privileges on Windows nodes running kubernetes-csi-proxy.
How does CVE-2023-3893 affect Kubernetes clusters?
Kubernetes clusters are affected if they include Windows nodes running kubernetes-csi-proxy.
What is the severity of CVE-2023-3893?
The severity of CVE-2023-3893 is high, with a severity value of 8.8.
How can I fix CVE-2023-3893?
To fix CVE-2023-3893, upgrade to kubernetes-csi-proxy version 1.1.3 or 2.0.0-alpha.1, depending on the affected version.
Where can I find more information about CVE-2023-3893?
You can find more information about CVE-2023-3893 at the following references: - [GitHub Issue](https://github.com/kubernetes/kubernetes/issues/119594) - [Google Groups Announcement](https://groups.google.com/g/kubernetes-security-announce/c/lWksE2BoCyQ) - [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-3893)
- collector/oss-sec
- alias/CVE-2023-3893
- collector/nvd-api
- collector/github-advisory-latest
- alias/GHSA-r6cc-7wj7-gfx2
- collector/nvd-cve
- collector/github-advisory
- agent/author
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- agent/first-publish-date
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- agent/weakness
- agent/title
- agent/last-modified-date
- agent/severity
- agent/references
- agent/event
- agent/description
- agent/tags
- agent/trending
- vendor/kubernetes
- canonical/kubernetes csi proxy
- version/kubernetes csi proxy/1.1.2
- version/kubernetes csi proxy/2.0.0-alpha0
- package-manager/go