Auth bypass in Clastix Capsule
CVE-2022-46167
Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to version 0.1.3, a ServiceAccount deployed in a Tenant Namespace, when granted with `PATCH` capabilities on its own Namespace, is able to edit it and remove the Owner Reference, breaking the reconciliation of the Capsule Operator and removing all the enforcement like Pod Security annotations, Network Policies, Limit Range and Resource Quota items. An attacker could detach the Namespace from a Tenant that is forbidding starting privileged Pods using the Pod Security labels by removing the OwnerReference, removing the enforcement labels, and being able to start privileged containers that would be able to start a generic Kubernetes privilege escalation. Patches have been released for version 0.1.3. No known workarounds are available.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000
Affected products
- Clastix Capsule — versions < 0.1.3
Weakness classification (CWE)
References
- github.com/clastix/capsule/security/advisories/GHSA-x45c-cvp8-q4fm (Third Party Advisory)
- github.com/clastix/capsule/commit/1df430e71be8c4778c82eca3459978ad7d0b4b7b (Patch, Third Party Advisory)
- github.com/clastix/capsule/commit/75525ac19254b0c5111e34d7985e2be7bc8b1ac1 (Patch, Third Party Advisory)
- github.com/clastix/capsule/releases/tag/v0.1.3 (Patch, Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-46167?
- CVE-2022-46167 is a high-severity vulnerability in Clastix Capsule, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2022-12-02.
- How severe is CVE-2022-46167?
- High severity. CVSS v3 base score is 8.8 out of 10.