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bdu:2023-02885

EUVD-2026-212588

fkie_cve-2023-22651

Improper Privilege Management vulnerability in SUSE Rancher allows Privilege Escalation. A failure in the update logic of Rancher's admission Webhook may lead to the misconfiguration of the Webhook. This component enforces validation rules and security checks before resources are admitted into the Kubernetes cluster. The issue only affects users that upgrade from 2.6.x or 2.7.x to 2.7.2. Users that did a fresh install of 2.7.2 (and did not follow an upgrade path) are not affected.

GHSA-6m9f-pj6w-w87g — Rancher Webhook is misconfigured during upgrade process

Affected: Go: github.com/rancher/rancher

### Impact

A failure in the update logic of Rancher's admission Webhook may lead to the misconfiguration of the Webhook. This component enforces validation rules and security checks before resources are admitted into the Kubernetes cluster.

When the Webhook is operating in a degraded state, it no longer validates any resources, which may result in severe privilege escalations and data corruption.

The issue only affects users that upgrade from `2.6.x` or `2.7.x` to `2.7.2`. Users that did a fresh install of 2.7.2 (and did not follow an upgrade path) are not affected.

The command below can be executed on the `local` cluster to determine whether the cluster is affected by this issue:

```sh $ kubectl get validatingwebhookconfigurations.admissionregistration.k8s.io rancher.cattle.io

NAME WEBHOOKS AGE rancher.cattle.io 0 19h ```

If the resulting webhook quantity is `0`, the Rancher instance is affected.

### Patches

Patched versions include release `2.7.3` and later versions.

### Workarounds

If you are affected and cannot update to a patched Rancher version, the recommended workaround is to manually reconfigure the Webhook with the script below. Please note that the script must be run from inside the `local` cluster or with a kubeconfig pointing to the `local` cluster which has admin permissions.

```yaml #!/bin/bash

set -euo pipefail

function prereqs() { if ! [ -x "$(command -v kubectl)" ]; then echo "error: kubectl is not installe…

gsd-2023-22651

WID-SEC-W-2023-1069 — Rancher: Schwachstelle ermöglicht Privilegieneskalation

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Rancher ausnutzen, um seine Privilegien zu erhöhen.