Vulnerability · Published Dec 2, 2022 · Assigned by GitHub_M
CVE-2022-46167Capsule vulnerable to privilege escalation by ServiceAccount deployed in a Tenant Namespace
High 8.8
In plain English
A high-severity incorrect authorization in capsule from clastix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/clastix/capsule | 0.1.3 | GHSA-x45c-cvp8-q4fm |
| Go | github.com/clastix/capsule | 0.1.3 | GO-2022-1135 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/clastix/capsule/security/advisories/GHSA-x45c-cvp8-q4fm x_refsource_CONFIRM
- https://github.com/clastix/capsule/commit/1df430e71be8c4778c82eca3459978ad7d0b4b7b x_refsource_MISC
- https://github.com/clastix/capsule/commit/75525ac19254b0c5111e34d7985e2be7bc8b1ac1 x_refsource_MISC
- https://github.com/clastix/capsule/releases/tag/v0.1.3 x_refsource_MISC