CVE-2023-46254
Summary
| CVE | CVE-2023-46254 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2023-11-06 19:15:00 UTC |
| Updated | 2023-11-14 19:35:00 UTC |
| Description | capsule-proxy is a reverse proxy for Capsule kubernetes multi-tenancy framework. A bug in the RoleBinding reflector used by `capsule-proxy` gives ServiceAccount tenant owners the right to list Namespaces of other tenants backed by the same owner kind and name. For example consider two tenants `solar` and `wind`. Tenant `solar`, owned by a ServiceAccount named `tenant-owner` in the Namespace `solar`. Tenant `wind`, owned by a ServiceAccount named `tenant-owner` in the Namespace `wind`. The Tenant owner `solar` would be able to list the namespaces of the Tenant `wind` and vice-versa, although this is not correct. The bug introduces an exfiltration vulnerability since allows the listing of Namespace resources of other Tenants, although just in some specific conditions: 1. `capsule-proxy` runs with the `--disable-caching=false` (default value: `false`) and 2. Tenant owners are ServiceAccount, with the same resource name, but in different Namespaces. This vulnerability doesn't allow any privilege escalation on the outer tenant Namespace-scoped resources, since the Kubernetes RBAC is enforcing this. This issue has been addressed in version 0.4.5. Users are advised to upgrade. There are no known workarounds for this vulnerability. |
Risk And Classification
Problem Types: NVD-CWE-noinfo
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Clastix | Capsule | All | All | All | All |
| Application | Clastix | Capsule-proxy | All | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| fix(rolebinding-reflector): namespaced name for serviceaccount users · projectcapsule/capsule-proxy@615202f · GitHub | MISC | github.com | |
| Owners of different tenants but with the same ServiceAccount name can see Namespaces of colliding tenants · Advisory · projectcapsule/capsule-proxy · GitHub | MISC | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 995842 GO (Go) Security Update for github.com/projectcapsule/capsule (GHSA-6758-979h-249x)