PT-2022-27782 · Capsule · Capsule
Maxfedotov
+1
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Published
2022-12-02
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Updated
2024-08-21
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CVE-2022-46167
CVSS v3.1
8.8
High
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Capsule versions prior to 0.1.3
Description
Capsule is a multi-tenancy and policy-based framework for Kubernetes. 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.Recommendations
For versions prior to 0.1.3, upgrade to version 0.1.3 to resolve the issue. As a temporary workaround, consider restricting the
PATCH capabilities on the Namespace for the ServiceAccount deployed in the Tenant Namespace until the upgrade is applied. Additionally, restrict access to the vulnerable OwnerReference and enforcement labels, such as Pod Security annotations, Network Policies, Limit Range, and Resource Quota items, to minimize the risk of exploitation.Exploit
Fix
Incorrect Authorization
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Weakness Enumeration
Related Identifiers
Affected Products
Capsule