Vulnerability Description
capsule-proxy is a reverse proxy for the capsule operator project. Affected versions are subject to a privilege escalation vulnerability which is based on a missing check if the user is authenticated based on the `TokenReview` result. All the clusters running with the `anonymous-auth` Kubernetes API Server setting disable (set to `false`) are affected since it would be possible to bypass the token review mechanism, interacting with the upper Kubernetes API Server. This privilege escalation cannot be exploited if you're relying only on client certificates (SSL/TLS). This vulnerability has been addressed in version 0.4.6. Users are advised to upgrade.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Clastix | Capsule-Proxy | <= 0.4.5 |
Related Weaknesses (CWE)
References
- https://github.com/projectcapsule/capsule-proxy/commit/472404f7006a4152e4eec76dePatch
- https://github.com/projectcapsule/capsule-proxy/security/advisories/GHSA-fpvw-6mExploitVendor Advisory
- https://github.com/projectcapsule/capsule-proxy/commit/472404f7006a4152e4eec76dePatch
- https://github.com/projectcapsule/capsule-proxy/security/advisories/GHSA-fpvw-6mExploitVendor Advisory
FAQ
What is CVE-2023-48312?
CVE-2023-48312 is a vulnerability with a CVSS score of 9.8 (CRITICAL). capsule-proxy is a reverse proxy for the capsule operator project. Affected versions are subject to a privilege escalation vulnerability which is based on a missing check if the user is authenticated ...
How severe is CVE-2023-48312?
CVE-2023-48312 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2023-48312?
Check the references section above for vendor advisories and patch information. Affected products include: Clastix Capsule-Proxy.