| タイトル | Azure 2026-03-17 Incorrect Privilege Assignment |
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| 説明 | 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) |
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| ソース | ⚠️ https://olearysec.com/research/azure-backup-aks-silent-patch |
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| ユーザー | olearysec (UID 98242) |
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| 送信 | 2026年05月13日 17:49 (28 日 ago) |
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| モデレーション | 2026年06月01日 15:51 (19 days later) |
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| ステータス | 承諾済み |
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| VulDBエントリ | 367647 [Microsoft Azure Backup for AKS 2026-03-17 特権昇格] |
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| ポイント | 20 |
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