| Titel | Azure 2026-03-17 Incorrect Privilege Assignment |
|---|
| Beschreibung | Azure Backup for AKS incorrectly enables cluster-admin Trusted Access for any principal with Backup Contributor—a role with no Kubernetes access—allowing full cluster compromise without kubectl or RBAC permissions.
CERT/CC independently validated this vulnerability as VU#284781 on 2026-04-16.
Attack chain: (1) Attacker has Backup Contributor on backup vault, (2) enables backup on target AKS cluster, (3) Azure auto-grants Trusted Access with cluster-admin equivalent, (4) attacker extracts secrets via backup or restores malicious workloads.
Microsoft silently patched this vulnerability without assigning a CVE, publishing a security advisory, or notifying customers. Evidence of patch: new error messages and permission requirements that did not exist during original testing.
CVSS 3.1: 9.9 Critical (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) |
|---|
| Quelle | ⚠️ https://olearysec.com/research/azure-backup-aks-silent-patch |
|---|
| Benutzer | olearysec (UID 98242) |
|---|
| Einreichung | 13.05.2026 17:49 (vor 23 Tagen) |
|---|
| Moderieren | 01.06.2026 15:51 (19 days later) |
|---|
| Status | Akzeptiert |
|---|
| VulDB Eintrag | 367647 [Microsoft Azure Backup for AKS 2026-03-17 erweiterte Rechte] |
|---|
| Punkte | 20 |
|---|