A Improper Privilege Management vulnerability in SUSE Rancher allows write access to the Catalog for any user when restricted-admin role is enabled. This issue affects: SUSE Rancher Rancher versions prior to 2.5.13; Rancher versions prior to 2.6.4.

Affected: Go: github.com/rancher/rancher

### Impact

This vulnerability only affects customers using the [`restricted-admin`](https://rancher.com/docs/rancher/v2.6/en/admin-settings/rbac/global-permissions/#restricted-admin) role in Rancher. For this role to be active, Rancher must be bootstrapped with the environment variable `CATTLE_RESTRICTED_DEFAULT_ADMIN=true` or the configuration flag `restrictedAdmin=true`.

A flaw was discovered in Rancher versions from 2.5.0 up to and including 2.5.12 and from 2.6.0 up to and including 2.6.3 where the `global-data` role in `cattle-global-data` namespace grants write access to the Catalogs. Since each user with any level of catalog access was bound to the `global-data` role, this grants write access to templates (`CatalogTemplates`) and template versions (`CatalogTemplateVersions`) for any user with any level of catalog access. New users created in Rancher are by default assigned to the `user` role (standard user), which is not designed to grant write catalog access. This vulnerability effectively elevates the privilege of any user to write access for the catalog template and catalog template version resources.

A malicious user could abuse this vulnerability to:

1. Make applications or individual versions of applications visible or hidden on the UI, by modifying `version` and `rancherMaxVersion` fields. 2. Change the logo (field `icon`) of an application or template to an arbitrary image. 3. Make a chart appear as a trusted or partner chart. This can be abused to make les…