{"id":49553,"date":"2022-03-23T09:00:33","date_gmt":"2022-03-23T00:00:33","guid":{"rendered":"https:\/\/www.creationline.com\/?p=49553"},"modified":"2022-03-16T20:34:06","modified_gmt":"2022-03-16T11:34:06","slug":"kubernetes-rbac%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bnode-proxy%e6%a8%a9%e9%99%90%e3%81%8b%e3%82%89%e3%81%ae%e6%a8%a9%e9%99%90%e6%98%87%e6%a0%bc-aqua-%e3%82%b3%e3%83%b3%e3%83%86%e3%83%8a-%e3%82%bb","status":"publish","type":"post","link":"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/49553","title":{"rendered":"Kubernetes RBAC\u306b\u304a\u3051\u308bNode\/Proxy\u6a29\u9650\u304b\u3089\u306e\u6a29\u9650\u6607\u683c #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #k8s"},"content":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672022\u5e743\u67083\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c<a href=\"https:\/\/blog.aquasec.com\/privilege-escalation-kubernetes-rbac\" rel=\"nofollow noopener noreferrer\" target=\"_blank\"> Privilege Escalation from Node\/Proxy Rights in Kubernetes RBAC <\/a>\u300d\u306e\u65e5\u672c\u8a9e\u7ffb\u8a33\u3067\u3059\u3002<\/p>\n<p><center><img loading=\"lazy\" decoding=\"async\" src=\"\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2022\/03\/35edb1ddc95db67e93d9e7fba633a886.png\" alt=\"\" width=\"867\" height=\"418\" class=\"alignnone size-full wp-image-49554\" srcset=\"https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2022\/03\/35edb1ddc95db67e93d9e7fba633a886.png 867w, https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2022\/03\/35edb1ddc95db67e93d9e7fba633a886-360x174.png 360w, https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2022\/03\/35edb1ddc95db67e93d9e7fba633a886-768x370.png 768w\" sizes=\"auto, (max-width: 867px) 100vw, 867px\" \/><\/center><\/p>\n<h2>Kubernetes RBAC\u306b\u304a\u3051\u308bNode\/Proxy\u6a29\u9650\u304b\u3089\u306e\u6a29\u9650\u6607\u683c<\/h2>\n<hr \/>\n<p>Kubernetes \u306e\u8c4a\u5bcc\u306a API \u3068\u5e83\u7bc4\u306a\u6a5f\u80fd\u306e\u526f\u4f5c\u7528\u3068\u3057\u3066\u3001\u30e6\u30fc\u30b6\u306b\u6a29\u9650\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3068\u3044\u3046\u70b9\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30fc\u30ad\u30c6\u30af\u30c8\u306f\u3001Kubernetes \u3092\u4f7f\u7528\u3059\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u8a2d\u8a08\u3059\u308b\u969b\u306b\u3001\u3053\u308c\u3089\u306e\u526f\u4f5c\u7528\u3092\u8a8d\u8b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002NCC Group \u306e <a href=\"https:\/\/twitter.com\/smarticu5\" rel=\"noopener\" target=\"_blank\">Iain Smart<\/a> \u6c0f\u3068\u306e\u6700\u8fd1\u306e\u8abf\u67fb\u3067\u306f\u3001Kubernetes \u306e Node\/Proxy \u30ea\u30bd\u30fc\u30b9\u306b\u6a29\u9650\u3092\u4ed8\u4e0e\u3059\u308b\u3068\u3001\u76e3\u67fb\u30ed\u30b0\u3084\u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5236\u5fa1\u3092\u30d0\u30a4\u30d1\u30b9\u3067\u304d\u308b\u3088\u3046\u306a\u65b9\u6cd5\u304c\u767a\u898b\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h3>Kubernetes API\u30b5\u30fc\u30d0\u30d7\u30ed\u30ad\u30b7\u3068\u306f<\/h3>\n<p>\u6700\u521d\u306b\u8003\u3048\u308b\u3079\u304d\u306f\u3001\u300cNode Proxy\u3068\u306f\u4f55\u304b\u3001\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u306e\u304b\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002Kubernetes API \u306e\u3042\u307e\u308a\u77e5\u3089\u308c\u3066\u3044\u306a\u3044\u6a5f\u80fd\u306b\u306f\u3001\u30e6\u30fc\u30b6\u304c API \u30b5\u30fc\u30d0\u3092\u4ecb\u3057\u3066\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u5185\u3067\u52d5\u4f5c\u3057\u3066\u3044\u308b\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3078\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u30d7\u30ed\u30ad\u30b7\u3067\u304d\u308b\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u6a5f\u80fd\u306f\u3001\u30e6\u30fc\u30b6\u304c\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u76f4\u63a5\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u305f\u3081\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3084\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306b\u4fbf\u5229\u3067\u3059\u3002\u3057\u304b\u3057\u3053\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u306f API \u30b5\u30fc\u30d0\u3092\u4ecb\u3057\u3066\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u306b\u3001\u3053\u306e\u30a2\u30af\u30bb\u30b9\u306f Pod \u3068 Service \u306e IP \u30a2\u30c9\u30ec\u30b9\u306b\u5236\u9650\u3055\u308c\u3066\u304a\u308a\u3001API \u30b5\u30fc\u30d0\u3092\u4e00\u822c\u7684\u306a\u30d7\u30ed\u30ad\u30b7\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u306a\u3044\u306f\u305a\u3067\u3059\u3002\u3057\u304b\u3057\u3001<a href=\"https:\/\/kinvolk.io\/blog\/2019\/02\/abusing-kubernetes-api-server-proxying\/\" rel=\"noopener\" target=\"_blank\">2019 \u5e74\u306b Kinvolk \u793e\u304c\u6307\u6458\u3057\u305f<\/a>\u3088\u3046\u306b\u3001API \u30b5\u30fc\u30d0\u3092\u4e0d\u6b63\u306b\u5229\u7528\u3057\u3066\u3001\u3042\u308b\u4efb\u610f\u306e\u5916\u90e8 IP \u30a2\u30c9\u30ec\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u8a31\u53ef\u3055\u305b\u308b\u3053\u3068\u306f\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001Kubernetes \u306b\u306f API \u30b5\u30fc\u30d0\u3092\u7d4c\u7531\u3057\u3066\u30af\u30e9\u30b9\u30bf\u30fc\u30ce\u30fc\u30c9\u4e0a\u3067\u52d5\u4f5c\u3059\u308b Service \u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u822c\u306b\u3001\u3053\u308c\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u8a8d\u8a3c\u306a\u3057\u3067\u884c\u308f\u308c\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30c6\u30b9\u30c8\u6642\u306b\u6c17\u3065\u3044\u305f\u306e\u306f\u3001Kubelet API \u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f\u8a8d\u8a3c\u60c5\u5831\u4ed8\u304d\u3067\u884c\u308f\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3057\u305f\u3002\u3064\u307e\u308a Node\/Proxy\u6a29\u9650\u3092\u6301\u3064\u30e6\u30fc\u30b6\u306f\u3001\u30ce\u30fc\u30c9\u4e0a\u306e\u3059\u3079\u3066\u306e Pod \u3067\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u306a\u3069\u3001\u57fa\u672c\u7684\u306b Kubelet API \u304c\u8a31\u53ef\u3059\u308b\u3042\u3089\u3086\u308b\u3053\u3068\u304c\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>Kubelet API \u3068\u76f4\u63a5\u901a\u4fe1\u3059\u308b<\/h3>\n<p>\u3055\u3089\u306b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8aad\u3093\u3060\u308a\u3001\u5354\u529b\u7684\u306a Kubernetes \u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306e\u30e1\u30f3\u30d0\u30fc\u306b\u5c0b\u306d\u305f\u308a\u3057\u305f\u7d50\u679c\u3001\u3053\u306e(\u8aa4\u3063\u305f)\u4f7f\u3044\u65b9\u304c\u4ed6\u306b\u3082\u3042\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u3002\u305d\u308c\u306f\u3001Node\/Proxy \u306e<a href=\"\/lab\/28291\" rel=\"noopener\" target=\"_blank\">\u30ed\u30fc\u30eb\u30d9\u30fc\u30b9\u30a2\u30af\u30bb\u30b9\u5236\u5fa1(RBAC)<\/a>\u6a29\u9650\u306f\u3001Kubelet API \u3067\u3082\u76f4\u63a5\u4f7f\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u3053\u308c\u3089\u306e\u6a29\u9650\u3092\u6301\u3064\u30e6\u30fc\u30b6\u306f Kubelet \u306b\u76f4\u63a5\u901a\u4fe1\u3057\u3001API \u30b5\u30fc\u30d0\u3092\u30d0\u30a4\u30d1\u30b9\u3067\u304d\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u89b3\u70b9\u304b\u3089\u3001\u3053\u308c\u306f\u3044\u304f\u3064\u304b\u306e\u6df1\u523b\u306a\u7d50\u679c\u3092\u3082\u305f\u3089\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>Kubelet API \u306f Kubernetes \u306e\u76e3\u67fb\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u3053\u306e API \u3092\u4f7f\u7528\u3057\u3066\u884c\u308f\u308c\u305f\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u9069\u5207\u306b\u76e3\u67fb\u3067\u304d\u306a\u3044\u3067\u3057\u3087\u3046\u3002\n<li>Kubelet API \u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f Kubernetes \u306e Admission Controller \u3092\u30d0\u30a4\u30d1\u30b9\u3059\u308b\u305f\u3081\u3001\u305d\u306e\u6a29\u9650\u3092\u6301\u3064\u30e6\u30fc\u30b6\u306f\u3001\u4ed6\u306e\u65b9\u6cd5\u3067\u306f\u963b\u6b62\u3055\u308c\u308b\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u3059\u308a\u629c\u3051\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/ul>\n<p>\u3053\u3053\u3067\u306f\u3001\u5b9f\u969b\u306e\u30c7\u30e2\u3067\u305d\u306e\u69d8\u5b50\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u307e\u305a\u3001Node\/Proxy\u6a29\u9650\u306e\u307f\u3092\u6301\u3064 ClusterRole \u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<div data-hs-responsive-table=\"true\" style=\"overflow-x: auto; max-width: 100%; width: 100%; margin-left: auto; margin-right: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; table-layout: fixed; border: 1px solid #99acc2; border-width: 0px; border-style: none;\">\n<tbody>\n<tr>\n<td style=\"width: 100%; padding: 4px; background-color: #ebf3fa; border-width: 0px; border-style: none;\">\n<p style=\"font-size: 18px;\"><span style=\"font-family: 'Courier New', Courier, monospace;\">apiVersion: rbac.authorization.k8s.io\/v1<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">kind: ClusterRole<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace; background-color: transparent;\">metadata:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; creationTimestamp: \"2022-01-07T11:48:17Z\"<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; name: nodeproxy<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; uid: 01b56e4a-6109-43d9-92e8-14013c0054ed<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">rules:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; - apiGroups:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; - \"\"<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; resources:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; - nodes\/proxy<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; verbs:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; - get<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; - create<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u6b21\u306b\u3001ServiceAccount \u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<div data-hs-responsive-table=\"true\" style=\"overflow-x: auto; max-width: 100%; width: 100%; margin-left: auto; margin-right: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; table-layout: fixed; border: 1px solid #99acc2; border-width: 0px; border-style: none;\">\n<tbody>\n<tr>\n<td style=\"width: 100%; padding: 4px; background-color: #ebf3fa;\">\n<p style=\"font-size: 18px;\"><span style=\"font-family: 'Courier New', Courier, monospace;\">apiVersion: v1<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">kind: ServiceAccount<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">metadata:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; creationTimestamp: \"2022-01-07T11:51:27Z\"<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; name: nodeproxy<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; namespace: default<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; uid: a67ae864-a3da-402a-bdff-c181c86dd9b1<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u6b21\u306b\u3001\u305d\u306e ServiceAccount \u3068 ClusterRole \u3092\u5bfe\u8c61\u3068\u3057\u305f ClusterRoleBinding \u30ea\u30bd\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<div data-hs-responsive-table=\"true\" style=\"overflow-x: auto; max-width: 100%; width: 100%; margin-left: auto; margin-right: auto;\">\n<table style=\"width: 100%; border-collapse: collapse; table-layout: fixed; border: 1px solid #99acc2; border-width: 0px; border-style: none;\">\n<tbody>\n<tr>\n<td style=\"width: 100%; padding: 4px; background-color: #ebf3fa;\">\n<p style=\"font-size: 18px;\"><span style=\"font-family: 'Courier New', Courier, monospace;\">apiVersion: rbac.authorization.k8s.io\/v1<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">kind: ClusterRoleBinding<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">metadata:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; creationTimestamp: \"2022-01-07T11:50:58Z\"<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; name: nodeproxybinding<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; uid: e368c3ac-945f-41d2-a6b1-7caa2eaf8038<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">roleRef:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; apiGroup: rbac.authorization.k8s.io<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; kind: ClusterRole<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; name: nodeproxy<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">subjects:<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; - kind: ServiceAccount<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; name: nodeproxy<br \/><\/span><span style=\"font-family: 'Courier New', Courier, monospace;\">&nbsp; namespace: default<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u3053\u308c\u3089\u306e\u6761\u4ef6\u304c\u63c3\u3048\u3070\u3001ServiceAccount Token \u3092\u53d6\u5f97\u3057\u3001\u305d\u308c\u3092\u4f7f\u3063\u3066 Kubelet API \u3068\u76f4\u63a5\u901a\u4fe1\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u52d5\u753b\u3067\u306f\u3001Secret \u306e\u53d6\u5f97\u3001Kubelet API\/Pods \u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3078\u30a2\u30af\u30bb\u30b9\u3001\u3059\u3079\u3066\u306e Pod \u30c7\u30fc\u30bf\u304c\u8868\u793a\u3067\u304d\u308b\u3053\u3068\u306e\u78ba\u8a8d\u3001Node \u4e0a\u306e Pod \u306e 1 \u3064\u306b\u5bfe\u3057\u3066 whoami \u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3001root \u3068\u3057\u3066\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3067\u304d\u308b\u3053\u3068\u3092\u3001\u9806\u306b\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"hs-embed-wrapper\" data-service=\"youtube\" data-responsive=\"true\" style=\"position: relative; overflow: hidden; width: 100%; height: auto; padding: 0px; max-width: 650px; max-height: 367.25px; min-width: 256px; display: block; margin: auto;\">\n<div class=\"hs-embed-content-wrapper\">\n<div style=\"position: relative; overflow: hidden; max-width: 100%; padding-bottom: 56.5%; margin: 0px;\" data-mce-style=\"position: relative; overflow: hidden; max-width: 100%; padding-bottom: 56.5%; margin: 0px;\"><iframe loading=\"lazy\" width=\"200\" height=\"113\" src=\"https:\/\/www.youtube.com\/embed\/hjeFW6Us49o?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen style=\"position: absolute; top: 0px; left: 0px; width: 100%; height: 100%; border: none;\" xml=\"lang\" data-mce-src=\"https:\/\/www.youtube.com\/embed\/hjeFW6Us49o?feature=oembed\" data-mce-style=\"position: absolute; top: 0px; left: 0px; width: 100%; height: 100%; border: none;\"><\/iframe><\/div>\n<\/div>\n<\/div>\n<h2>\u307e\u3068\u3081<\/h2>\n<hr \/>\n<p>\u3053\u306e\u3088\u3046\u306a\u6a29\u9650\u6607\u683c\u304c\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u77e5\u3063\u305f\u4e0a\u3067\u3001\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3059\u308b\u305f\u3081\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u30b0\u30c3\u30c9\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u306f\u3069\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\u660e\u793a\u7684\u306b\u3001\u307e\u305f\u306f\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9 RBAC \u6a29\u9650\u306e\u4e00\u90e8\u3068\u3057\u3066\u3001Node\/Proxy \u306e\u6a29\u9650\u3092\u8ab0\u306b\u4e0e\u3048\u308b\u304b\u306b\u3064\u3044\u3066\u3001\u5341\u5206\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\n<li>\u3053\u308c\u304c\u30af\u30e9\u30b9\u30bf\u30fc\u306b\u3068\u3063\u3066\u30ea\u30b9\u30af\u3068\u306a\u308b\u5834\u5408\u3001Kubelet \u30b5\u30fc\u30d3\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3067\u4fdd\u8b77\u3059\u308b\u3053\u3068\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30e6\u30fc\u30b6\u306f Node\/Proxy \u3092\u7d4c\u7531\u3057\u3066\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3067\u3059\u304c\u3001\u305d\u306e\u30a2\u30af\u30bb\u30b9\u306f Kubernetes \u76e3\u67fb\u30ed\u30b0\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002\n<li>Kubelet API \u3078\u306e\u6b63\u78ba\u306a\u30a2\u30af\u30bb\u30b9\u306f\u76e3\u67fb\u30ed\u30b0\u306b\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u304c\u3001Kubelet \u304c\u30e6\u30fc\u30b6\u306e\u8a31\u53ef\u3092\u78ba\u8a8d\u3059\u308b subjectaccessrequest \u306e\u30a8\u30f3\u30c8\u30ea\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<a href=\"https:\/\/hackmd.io\/mAw7YdYXQ06VOkMu7WGplw\" rel=\"noopener\" target=\"_blank\">Kubelet \u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3092\u691c\u51fa\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089<\/a> \u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002\n<\/ul>\n<p>\u3053\u306e\u6295\u7a3f\u3067\u306f\u3001<a href=\"\/lab\/28291\" rel=\"noopener\" target=\"_blank\">Kubernetes \u306e RBAC<\/a> \u306b\u95a2\u9023\u3059\u308b\u8907\u96d1\u3055\u306e\u4e00\u90e8\u3092\u7d39\u4ecb\u3057\u3001\u30e6\u30fc\u30b6\u3084\u30b5\u30fc\u30d3\u30b9\u306b\u4f7f\u7528\u6a29\u3092\u4ed8\u4e0e\u3059\u308b\u969b\u306b\u6700\u5c0f\u7279\u6a29\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u3068\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308b\u7406\u7531\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002Kubernetes \u306f\u975e\u5e38\u306b\u67d4\u8edf\u3067\u30ea\u30c3\u30c1\u306a\u30b7\u30b9\u30c6\u30e0\u3067\u3059\u304c\u3001\u3053\u3046\u3057\u305f\u7279\u6027\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u89b3\u70b9\u304b\u3089\u3082\u5f71\u97ff\u3092\u53ca\u307c\u3057\u307e\u3059\u3002<\/p>\n<p><center>\n\t\t<!--HubSpot Call-to-Action Code -->\n\t\t<span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-fecc193b-bbc5-40d2-9588-ed7b022af3aa\">\n\t\t<span class=\"hs-cta-node hs-cta-fecc193b-bbc5-40d2-9588-ed7b022af3aa\" id=\"fecc193b-bbc5-40d2-9588-ed7b022af3aa\">\n\t\t<!--[if lte IE 8]>\n\t\t<div id=\"hs-cta-ie-element\"><\/div>\n\t\t<![endif]-->\n\t\t<a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/6168413\/fecc193b-bbc5-40d2-9588-ed7b022af3aa\" >\n\t\t<img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-fecc193b-bbc5-40d2-9588-ed7b022af3aa\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/6168413\/fecc193b-bbc5-40d2-9588-ed7b022af3aa.png\"  alt=\"New call-to-action\"\/>\n\t\t<\/a>\n\t\t<\/span>\n\t\t<script charset=\"utf-8\" src=\"\/\/js.hubspot.com\/cta\/current.js\"><\/script>\n\t\t<script>\n\t\thbspt.cta.load(6168413, 'fecc193b-bbc5-40d2-9588-ed7b022af3aa', {});\n\t\t<\/script>\n\t\t<\/span>\n\t\t<!-- end HubSpot Call-to-Action Code -->\n\t\t<\/center><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672022\u5e743\u67083\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c Privilege Escalation from Node\/Proxy Rights in Kubernetes RBAC \u300d\u306e [&#8230;]<\/p>\n","protected":false},"author":56,"featured_media":49554,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[176,122],"tags":[174,152,123,112,286,358],"class_list":["post-49553","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aquasecurity","category-kubernetes","tag-aqua","tag-aquasecurity","tag-k8s","tag-kubernetes","tag-286","tag-358"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kubernetes RBAC\u306b\u304a\u3051\u308bNode\/Proxy\u6a29\u9650\u304b\u3089\u306e\u6a29\u9650\u6607\u683c #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #k8s - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3<\/title>\n<meta name=\"description\" content=\"AquaSecurity, Kubernetes |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672022\u5e743\u67083\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c Privilege Escalation from\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/49553\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kubernetes RBAC\u306b\u304a\u3051\u308bNode\/Proxy\u6a29\u9650\u304b\u3089\u306e\u6a29\u9650\u6607\u683c #aqua #\u30b3\u30f3\u30c6\u30ca #\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 #k8s - Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"og:description\" content=\"AquaSecurity, Kubernetes |\u672c\u30d6\u30ed\u30b0\u306f\u300cAqua Security\u300d\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\u30672022\u5e743\u67083\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u300c Privilege Escalation from\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.creationline.com\/tech-blog\/cloudnative\/aquasecurity\/49553\" \/>\n<meta property=\"og:site_name\" content=\"Tech Blog\uff5c\u30af\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u30e9\u30a4\u30f3\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/creationline\" \/>\n<meta property=\"article:published_time\" content=\"2022-03-23T00:00:33+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.creationline.com\/tech-blog\/cms_x3GWkuX\/wp-content\/uploads\/2022\/03\/35edb1ddc95db67e93d9e7fba633a886.png\" \/>\n\t<meta property=\"og:image:width\" content=\"867\" \/>\n\t<meta property=\"og:image:height\" content=\"418\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Kent Magruder\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@creationline\" \/>\n<meta name=\"twitter:site\" content=\"@creationline\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kent Magruder\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.creationline.com\\\/tech-blog\\\/cloudnative\\\/aquasecurity\\\/49553#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.creationline.com\\\/tech-blog\\\/cloudnative\\\/aquasecurity\\\/49553\"},\"author\":{\"name\":\"Kent 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