{"id":110431,"date":"2020-12-21T19:30:16","date_gmt":"2020-12-22T03:30:16","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=110431"},"modified":"2020-12-27T16:33:45","modified_gmt":"2020-12-28T00:33:45","slug":"cve-2020-8554","status":"publish","type":"post","link":"https:\/\/origin-unit42.paloaltonetworks.com\/ja\/cve-2020-8554\/","title":{"rendered":"\u672a\u4fee\u6b63\u306eKubernetes\u4e2d\u9593\u8005\u653b\u6483\u8106\u5f31\u6027\u304b\u3089\u306e\u4fdd\u8b77 (CVE-2020-8554)"},"content":{"rendered":"<h2><strong>\u6982\u8981<\/strong><\/h2>\n<p>2020\u5e7412\u67084\u65e5\u3001Kubernetes Product Security Committee\u306f\u65b0\u305f\u306aKubernetes\u306e\u8106\u5f31\u6027\u3092<a href=\"https:\/\/github.com\/kubernetes\/kubernetes\/issues\/97076\">\u516c\u958b<\/a>\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u8106\u5f31\u6027\u306b\u306f\u8b58\u5225\u756a\u53f7 CVE-2020-8554 \u304c\u4ed8\u4e0e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u306f\u3059\u3079\u3066\u306eKubernetes\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u5f71\u97ff\u3059\u308b\u6df1\u523b\u5ea6\u304c\u4e2d\u7a0b\u5ea6\u306e\u554f\u984c\u3067<strong>\u672c\u7a3f\u306e\u516c\u958b\u6642\u70b9 (\u65e5\u672c\u6642\u9593 2020\u5e7412\u670822\u65e5\u5348\u524d09:30) \u3067\u306f\u30d1\u30c3\u30c1\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u305b\u3093<\/strong>\u3002<span style=\"font-weight: 400;\">CVE-2020-8554\u306f\u8a2d\u8a08\u4e0a\u306e\u6b20\u9665\u3067\u3001\u3053\u308c\u306b\u3088\u308aKubernetes\u30b5\u30fc\u30d3\u30b9\u306f\u3001\u4efb\u610f\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u3001\u30af\u30e9\u30b9\u30bf\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3055\u305b\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/span>\u30b5\u30fc\u30d3\u30b9\u3092\u7ba1\u7406\u3067\u304d\u308b\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30af\u30e9\u30b9\u30bf\u5185\u306e\u30dd\u30c3\u30c9\u3068\u30ce\u30fc\u30c9\u306b\u5bfe\u3057\u3066\u4e2d\u9593\u8005 (man-in-the-middle\u3001MITM\uff09\u653b\u6483\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u653b\u6483\u8005\u306fMITM\u653b\u6483\u3092\u5229\u7528\u3057\u3001\u5185\u5916\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u306a\u308a\u3059\u307e\u3057\u305f\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304b\u3089\u8cc7\u683c\u60c5\u5831\u3092\u53ce\u96c6\u3057\u305f\u308a\u3001\u88ab\u5bb3\u8005\u306e\u30c7\u30fc\u30bf\u3092\u610f\u56f3\u3057\u305f\u9001\u4fe1\u5148\u3078\u306e\u9001\u4fe1\u524d\u306b\u6539\u3056\u3093\u3057\u305f\u308a\u3001\u7279\u5b9aIP\u30a2\u30c9\u30ec\u30b9\u3068\u306e\u901a\u4fe1\u3092\u5b8c\u5168\u306b\u30d6\u30ed\u30c3\u30af\u3057\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff08TLS\uff09\u306a\u3069\u306e\u6697\u53f7\u5316\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3059\u308c\u3070\u653b\u6483\u8005\u306f\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u7c21\u5358\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u304f\u306a\u308b\u306e\u3067\u3001\u3053\u308c\u306f\u5bfe\u7b56\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u30af\u30e9\u30b9\u30bf\u306f\u6700\u3082\u30ea\u30b9\u30af\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u30af\u30e9\u30b9\u30bf\u306b\u306f\u30b5\u30fc\u30d3\u30b9\u3092\u7ba1\u7406\u3067\u304d\u308b\u7ba1\u7406\u8005\u4ee5\u5916\u306e\u30e6\u30fc\u30b6\u30fc\u306e\u3044\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u305f\u3081\u3067\u3059\u3002\u4e00\u30f6\u6240\u3067\u30c6\u30ca\u30f3\u30c8\u3092\u4fb5\u5bb3\u3057\u305f\u653b\u6483\u8005\u306f\u3001\u672c\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3066\u3001\u30af\u30e9\u30b9\u30bf\u5185\u306e\u3079\u3064\u306e\u30c6\u30ca\u30f3\u30c8\u306b\u5bfe\u3059\u308bMITM\u653b\u6483\u3092\u5b9f\u884c\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Kubernetes Product Security Committee\u306f\u3001CVE-2020-8554\u306b\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3059\u308b\u3068Kubernetes\u6a5f\u80fd\u306e\u4e00\u90e8\u306b\u5909\u66f4\u304c\u751f\u3058\u308b\u3068\u5224\u65ad\u3057\u305f\u3053\u3068\u304b\u3089\u3001\u77ed\u671f\u7684\u306b\u306f\u3053\u306e\u8106\u5f31\u6027\u3092\u89e3\u6c7a\u3059\u308b\u4e88\u5b9a\u306f\u7acb\u3063\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u3001\u8106\u5f31\u306a\u6a5f\u80fd\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3059\u308b\u7de9\u548c\u7b56\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/github.com\/kubernetes-sigs\/externalip-webhook\">\u30ab\u30b9\u30bf\u30e0\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9<\/a>\u306a\u3044\u3057<a href=\"https:\/\/kubernetes.io\/blog\/2019\/08\/06\/opa-gatekeeper-policy-and-governance-for-kubernetes\/\">Open Policy Agent (OPA) Gatekeeper<\/a><a href=\"https:\/\/github.com\/open-policy-agent\/gatekeeper-library\/tree\/master\/library\/general\/externalip\">\u306e\u30eb\u30fc\u30eb<\/a>\u3092\u4f7f\u3046\u65b9\u6cd5\u3067\u3059\u3002\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e<a href=\"https:\/\/www.paloaltonetworks.jp\/resources\/datasheets\/prisma-cloud-compute-edition-aag\">Prisma Cloud<\/a>\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u3054\u5229\u7528\u306e\u304a\u5ba2\u69d8\u306f\u3001OPA\u30eb\u30fc\u30eb\u7528\u306e\u7d44\u307f\u8fbc\u307f\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30b5\u30dd\u30fc\u30c8\u3092\u901a\u3058\u3001\u3053\u308c\u3089\u306e\u7de9\u548c\u7b56\u3092\u6709\u52b9\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u624b\u9806\u306b\u3064\u3044\u3066\u306f\u672c\u7a3f\u5dfb\u672b\u306e\u300cPrisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u3088\u308b\u7de9\u548c\u7b56\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><strong>\u8106\u5f31\u6027<\/strong><\/h2>\n<p>CVE-2020-8554\u306f\u3001Kubernetes Service\u306e\u5185\u306e2\u3064\u306e\u6a5f\u80fd\u3001External IPs\u3068Load Balancer IPs\u306e\u8a2d\u8a08\u4e0a\u306e\u6b20\u9665\u306b\u8d77\u56e0\u3057\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/kubernetes.io\/docs\/concepts\/services-networking\/service\/\">Kubernetes Services<\/a>\u3068\u306f\u3001\u4e00\u9023\u306e\u30dd\u30c3\u30c9\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066\u516c\u958b\u3059\u308b\u305f\u3081\u306e\u62bd\u8c61\u7684\u306a\u65b9\u6cd5\u3067\u3001\u30b5\u30fc\u30d3\u30b9\u306f1\u3064\u4ee5\u4e0a\u306eIP\u3067\u516c\u958b\u3055\u308c\u307e\u3059\u3002\u30c7\u30d7\u30ed\u30a4\u3055\u308c\u308b\u3068\u3001\u30af\u30e9\u30b9\u30bf\u5185\u306e\u30ce\u30fc\u30c9\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u69cb\u6210\u3059\u308b\u30d0\u30c3\u30ad\u30f3\u30b0\u30dd\u30c3\u30c9\uff08\u30b5\u30fc\u30d3\u30b9\u63d0\u4f9b\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u30dd\u30c3\u30c9\uff09\u306e\u3044\u305a\u308c\u304b1\u3064\u306b\u30b5\u30fc\u30d3\u30b9IP\u5b9b\u3066\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3057\u307e\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30b9\u30bf\u306b\u3088\u3063\u3066\u30b5\u30fc\u30d3\u30b9IP\u3092\u7ba1\u7406\u30fb\u5272\u308a\u5f53\u3066\u3066\u3044\u308b\u5834\u5408\u306f\u3068\u304f\u306b\u554f\u984c\u306f\u8d77\u3053\u308a\u307e\u305b\u3093\u304c\u3001Kubernetes\u30e6\u30fc\u30b6\u30fc\u304c\u30b5\u30fc\u30d3\u30b9\u306b\u4efb\u610f\u306eIP\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5834\u5408\u306b\u306f\u554f\u984c\u304c\u8d77\u3053\u308a\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u3001\u4ed6\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\uff08\u5185\u90e8\u30fb\u5916\u90e8\uff09\u3067\u3059\u3067\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u308bIP\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u305d\u308c\u3089\u306eIP\u3067\u30af\u30e9\u30b9\u30bf\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3059\u3079\u3066\u3092\u508d\u53d7\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30b5\u30fc\u30d3\u30b9\u306eIP\u3092\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306f2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u5916\u90e8IP\u3092\u5272\u308a\u5f53\u3066\u308b\u65b9\u6cd5<\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">status.loadBalancer.ingress.ip<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3057\u3066Load Balancer IP\u3092\u5272\u308a\u5f53\u3066\u308b\u65b9\u6cd5\u3002\u3053\u306e\u65b9\u6cd5\u306e\u5834\u5408\u3001<span style=\"font-family: 'courier new', courier, monospace;\">patch service\/status <\/span>\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u30af\u30e9\u30b9\u30bf\u306b\u30c7\u30d7\u30ed\u30a4\u3055\u308c\u305f\u5834\u5408\u3001IP\u30a2\u30c9\u30ec\u30b98.8.8.8 (Google\u306eDNS\u30b5\u30fc\u30d0\u30fc) \u5b9b\u306e\u3059\u3079\u3066\u306e\u30af\u30e9\u30b9\u30bfDNS\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3057\u3066<span style=\"font-family: 'courier new', courier, monospace;\">evil-dns-server<\/span>\u30dd\u30c3\u30c9\u306b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_110407\" aria-describedby=\"caption-attachment-110407\" style=\"width: 535px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-110408 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/word-image-217.png\" alt=\"\u3053\u306e\u30b5\u30fc\u30d3\u30b9\u306f\u3001\u30af\u30e9\u30b9\u30bf\u306b\u30c7\u30d7\u30ed\u30a4\u3055\u308c\u305f\u5834\u5408\u3001IP\u30a2\u30c9\u30ec\u30b98.8.8.8 (Google\u306eDNS\u30b5\u30fc\u30d0\u30fc) \u5b9b\u306e\u3059\u3079\u3066\u306e\u30af\u30e9\u30b9\u30bfDNS\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30c8\u3057\u3066evil-dns-server\u30dd\u30c3\u30c9\u306b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3057\u307e\u3059\u3002 \" width=\"535\" height=\"482\" \/><figcaption id=\"caption-attachment-110407\" class=\"wp-caption-text\">\u56f31 8.8.8.8\u3078\u306eDNS\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3059\u308b\u76ee\u7684\u3067\u5916\u90e8IP\u3092\u60aa\u7528\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d3\u30b9<\/figcaption><\/figure>\n<p>\u508d\u53d7\u3057\u305f\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u53d7\u4fe1\u3059\u308b\u306b\u306f\u3001<strong>\u653b\u6483\u8005\u306f\u60aa\u610f\u306e\u3042\u308b\u30b5\u30fc\u30d3\u30b9\u3092\u30d0\u30c3\u30ad\u30f3\u30b0\u3057\u3066\u3044\u308b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u81ea\u8eab\u306e\u5236\u5fa1\u4e0b\u306b\u7f6e\u3044\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/strong>\u3002\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u3053\u308c\u306f\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u306b\u793a\u3057\u305f<span style=\"font-family: 'courier new', courier, monospace;\">evil-dns-server<\/span>\u306e\u3088\u3046\u306a\u30dd\u30c3\u30c9\u306b\u306a\u308a\u307e\u3059\u3002\u30af\u30e9\u30b9\u30bf\u30fc\u30dd\u30c3\u30c9\u3067\u306f\u306a\u304f\u3001\u5916\u90e8\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3067\u30b5\u30fc\u30d3\u30b9\u3092\u30d0\u30c3\u30ad\u30f3\u30b0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u653b\u6483\u8005\u306f\u3001\u30af\u30e9\u30b9\u30bf\u5916\u306e\u5916\u90e8\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u508d\u53d7\u3057\u305f\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u653b\u6483\u8005\u306f<span style=\"font-family: 'courier new', courier, monospace;\">create endpoint<\/span>\u306e\u7279\u6a29\u3092\u6301\u3061\u3001\u305d\u308c\u306b\u3088\u3063\u3066\u5916\u90e8\u30a2\u30c9\u30ec\u30b9\u3092\u6307\u3059Kubernetes\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u4f5c\u6210\u3067\u304d\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4><strong>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f <\/strong><\/h4>\n<p>\u3053\u306e\u8106\u5f31\u6027\u306f\u3059\u3079\u3066\u306eKubernetes\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002\u307e\u305f\u73fe\u6642\u70b9\u3067\u306f\u30d1\u30c3\u30c1\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u6b21\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5834\u5408\u3001\u305d\u306e\u30af\u30e9\u30b9\u30bf\u306f\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u7ba1\u7406\u8005\u4ee5\u5916\u306eKubernetes\u30e6\u30fc\u30b6\u30fc\u304c\u30b5\u30fc\u30d3\u30b9\u3092\u4f5c\u6210\u30fb\u66f4\u65b0\u3057\u305f\u308a\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u306b\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3057\u305f\u308a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068 <strong>AND<\/strong>\n<ul>\n<li>\u305d\u308c\u3089\u7279\u6a29\u3092\u6301\u305f\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u306b\u30dd\u30c3\u30c9\u306e\u5236\u5fa1\u3092\u8a31\u53ef\u3057\u3066\u3044\u308b\u3053\u3068\uff08\u30dd\u30c3\u30c9\u4f5c\u6210\u30fb\u66f4\u65b0\u30fb\u5b9f\u884c) <strong>OR<\/strong><\/li>\n<li>\u305d\u308c\u3089\u7279\u6a29\u3092\u6301\u305f\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u306b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306e\u4f5c\u6210\u30fb\u66f4\u65b0\u3092\u8a31\u53ef\u3057\u3066\u3044\u308b\u3053\u3068<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u30af\u30e9\u30b9\u30bf\u306f\u6700\u3082\u30ea\u30b9\u30af\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u4e0a\u8a18\u306e\u3088\u3046\u306a\u8106\u5f31\u306a\u69cb\u6210\u306b\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u6700\u3082\u9ad8\u3044\u305f\u3081\u3067\u3059\u3002\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u30af\u30e9\u30b9\u30bf\u306f\u305d\u306e\u591a\u304f\u304cKubernetes\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u3063\u3066\u30c6\u30ca\u30f3\u30c8\u3092\u5206\u96e2\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u5404\u30c6\u30ca\u30f3\u30c8\u306e\u30a2\u30af\u30bb\u30b9\u8a31\u53ef\u3092\u305d\u306e\u540d\u524d\u7a7a\u9593\u5185\u306b\u5236\u9650\u3057\u3066\u3044\u307e\u3059\u3002\u6b8b\u5ff5\u306a\u304c\u3089\u3001\u30c6\u30ca\u30f3\u30c8\u304c\u7ba1\u7406\u53ef\u80fd\u306a\u306e\u306f\u81ea\u8eab\u306e\u540d\u524d\u7a7a\u9593\u5185\u306e\u30b5\u30fc\u30d3\u30b9\u3068\u30dd\u30c3\u30c9\u306e\u307f\u3067\u3042\u3063\u3066\u3082\u3001CVE-2020-8554\u3092\u60aa\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30af\u30e9\u30b9\u30bf\u5168\u4f53\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u76d7\u8074\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002\u4e00\u30f6\u6240\u3067\u30c6\u30ca\u30f3\u30c8\u3092\u4fb5\u5bb3\u3057\u305f\u653b\u6483\u8005\u306f\u3001\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3066\u4ed6\u306e\u30c6\u30ca\u30f3\u30c8\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3057\u3001\u4fb5\u5bb3\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u3001<a href=\"https:\/\/cilium.io\/\">Cilium<\/a>\u3067kube-proxy\u3092\u7f6e\u304d\u63db\u3048\u3066\u3044\u308b\u30af\u30e9\u30b9\u30bf\u306f\u307e\u3063\u305f\u304f<a href=\"https:\/\/cilium.io\/blog\/2020\/12\/11\/kube-proxy-free-cve-mitigation\">\u5f71\u97ff\u3092\u53d7\u3051\u307e\u305b\u3093<\/a>\u3002<\/p>\n<h4><strong>CVE-2020-8554\u306eIoC (\u4fb5\u5bb3\u306e\u75d5\u8de1)<\/strong><\/h4>\n<p>\u6b21\u306e\u3044\u305a\u308c\u304b\u306b\u8a72\u5f53\u3059\u308b\u5834\u5408\u3001\u653b\u6483\u3092\u53d7\u3051\u3066\u3044\u305f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>external IPs\u3084Load Balancer IPs\u3092\u516c\u958b\u3059\u3079\u304d\u3067\u306f\u306a\u3044\u30b5\u30fc\u30d3\u30b9\u3067\u3053\u308c\u3089\u304c\u516c\u958b\u3055\u308c\u3066\u3057\u307e\u3063\u3066\u3044\u308b\u3002<\/li>\n<li>\u30b5\u30fc\u30d3\u30b9\u306eexternal IPs\u307e\u305f\u306fLoad Balancer IPs\u304c\u3001\u305d\u306e\u30af\u30e9\u30b9\u30bf\u5185\u306e\u5185\u90e8IP\uff08\u30dd\u30c3\u30c9IP\u307e\u305f\u306f\u5225\u30b5\u30fc\u30d3\u30b9\u306eclusterIP\uff09\u3068\u5408\u81f4\u3057\u3066\u3044\u308b\u3002<\/li>\n<li>\u30b5\u30fc\u30d3\u30b9\u306eexternal IPs\u307e\u305f\u306fLoad Balancer IPs\u304c\u3001\u65e2\u77e5\u306e\u5916\u90e8\u30c9\u30e1\u30a4\u30f3\uff088.8.8.8\u306a\u3069\uff09\u3092\u6307\u3057\u3066\u3044\u308b\u3002<span style=\"font-family: 'courier new', courier, monospace;\">nslookup <\/span>\u3092\u5b9f\u884c\u3057\u3001\u65e2\u77e5\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u6307\u3057\u3066\u3044\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u6709\u7121\u3092\u8b58\u5225\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u30b5\u30fc\u30d3\u30b9\u306eLoad Balancer IPs\u304c\u300c127.0.0.1\u300d\u306b\u306a\u3063\u3066\u3044\u308b (\u30ce\u30fc\u30c9\u306elocalhost\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u3059\u308b\u8a66\u307f\u3092\u793a\u3059\u3082\u306e)\u3002<\/li>\n<\/ul>\n<p>external IPs\u3092\u516c\u958b\u3057\u3066\u3044\u308b\u30af\u30e9\u30b9\u30bf\u5185\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u8b58\u5225\u3059\u308b\u306b\u306f\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">kubectl get services \u2013all-namespaces -o=jsonpath='{\u201cNAMESPACE\\tNAME\\tEXTERNAL IPS\\n\u201d}{range .items[?(.spec.externalIPs)]}{.metadata.namespace}{\u201c\\t\u201d}{.metadata.name}{\u201c\\t\u201d}{.spec.externalIPs}{\u201c\\n\u201d}{end}\u2019 | column -t -s \u201c$(printf \u2018\\t\u2019)\u201d<\/pre>\n<p>Load Balancer IP\u3092\u516c\u958b\u3057\u3066\u3044\u308b\u30af\u30e9\u30b9\u30bf\u5185\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u8b58\u5225\u3059\u308b\u306b\u306f\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">kubectl get services \u2013all-namespaces -o=jsonpath='{\u201cNAMESPACE\\tNAME\\tLOAD BALANCER IPs\\n\u201d}{range .items[?(.status.loadBalancer.ingress[*].ip)]}{.metadata.namespace}{\u201c\\t\u201d}{.metadata.name}{\u201c\\t[\u201c}{range .status.loadBalancer.ingress[*]}{\u201c\\\u201d\u201d}{.ip}{\u201c\\\u201d,\u201d}{end}{\u201c]\\n\u201d}{end}\u2019 | sed \u2018s\/\\(.*\\),\/\\1\/\u2019 |column -t -s \u201c$(printf \u2018\\t\u2019)\u201d<\/pre>\n<h2><strong>\u56de\u907f\u30fb\u7de9\u548c\u7b56<\/strong><\/h2>\n<p>Kubernetes Product Security Committee \u306f\u3001\u3053\u306e\u8106\u5f31\u6027\u306b\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3059\u308b\u3068\u3001Kubernetes\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u4f9d\u5b58\u3059\u308b\u6a5f\u80fd\u3078\u306e\u5909\u66f4\u304c\u907f\u3051\u3089\u308c\u306a\u3044\u3068\u7d50\u8ad6\u4ed8\u3051\u307e\u3057\u305f\u3002\u305d\u3053\u3067\u3001\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3059\u308b\u4ee3\u308f\u308a\u306b\u8106\u5f31\u306a\u6a5f\u80fd\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3059\u308b\u7de9\u548c\u7b56\u3092\u5b9f\u65bd\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002external IPs\u306e\u4f7f\u7528\u3092\u9632\u3050\u305f\u3081\u3001Kubernetes Product Security Committee \u306f2\u3064\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u304c\u30ab\u30b9\u30bf\u30e0<a href=\"https:\/\/github.com\/kubernetes-sigs\/externalip-webhook\">\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9<\/a>\u3068<a href=\"https:\/\/kubernetes.io\/blog\/2019\/08\/06\/opa-gatekeeper-policy-and-governance-for-kubernetes\/\">OPA Gatekeeper<\/a>\u306e<a href=\"https:\/\/github.com\/open-policy-agent\/gatekeeper-library\/tree\/master\/library\/general\/externalip\">\u5236\u7d04<\/a>\u3067\u3059\u3002<\/p>\n<p>Load Balancer IP\u306e\u7de9\u548c\u7b56\u306f\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u305f\u3060\u3057\u3001Load Balancer IP\u3092\u4f7f\u3063\u3066\u672c\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u306b\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">patch service\/status<\/span>\u306e\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c\u5fc5\u8981\u3067\u3001\u3053\u308c\u306f\u7279\u6a29\u3068\u307f\u306a\u3055\u308c\u308b\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u7279\u6a29\u3092\u6301\u305f\u306a\u3044\u30af\u30e9\u30b9\u30bf \u30e6\u30fc\u30b6\u30fc\u306b\u3053\u306e\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3092\u4e0e\u3048\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u901a\u5e38\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u66f4\u65b0\u3059\u308b\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u30b7\u30b9\u30c6\u30e0\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306a\u306e\u3067\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u66f4\u65b0\u3057\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u30a2\u30ab\u30a6\u30f3\u30c8\u304c\u3042\u308c\u3070\u7591\u308f\u3057\u3044\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><strong>\u7d50\u8ad6<\/strong><\/h2>\n<p>CVE-2020-8554\u306fKubernetes\u30b5\u30fc\u30d3\u30b9\u306e\u8a2d\u8a08\u306b\u6839\u3056\u3057\u305f\u7279\u7570\u306a\u8106\u5f31\u6027\u3067\u3059\u3002\u30af\u30e9\u30b9\u30bf\u304c\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u306e\u5834\u5408\u3001\u307e\u305f\u306f\u7279\u6a29\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u306b\u30b5\u30fc\u30d3\u30b9\u306e\u4f5c\u6210\u30fb\u66f4\u65b0\u3092\u8a31\u53ef\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u672c\u8106\u5f31\u6027\u306e\u5f71\u97ff\u3092\u53d7\u3051\u307e\u3059\u3002\u30af\u30e9\u30b9\u30bf\u5185\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304cTLS\u306b\u3088\u308b\u6697\u53f7\u5316\u901a\u4fe1\u3092\u5f37\u5236\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u30ea\u30b9\u30af\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u306b\u30d1\u30c3\u30c1\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3067\u3082\u3001Kubernetes Product Security Committee\u306e\u63d0\u6848\u3059\u308b\u7de9\u548c\u7b56\u306b\u5f93\u3048\u3070\u3001\u60aa\u7528\u3092\u52b9\u679c\u7684\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u3054\u5229\u7528\u306e\u304a\u5ba2\u69d8\u306f\u3001\u4ed8\u9332\u306e\u300cPrisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u3088\u308b\u7de9\u548c\u7b56\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u306e\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u3066\u3001\u30af\u30e9\u30b9\u30bf\u30fc\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<h2><strong>\u4ed8\u9332: Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u3088\u308b\u7de9\u548c\u7b56<\/strong><\/h2>\n<p>Prisma Cloud \u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u7d44\u307f\u8fbc\u307f\u306eRego\u30eb\u30fc\u30eb\u306e\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30b5\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001Kubernetes Product Security Committee\u306e\u63d0\u6848\u3059\u308b\u7de9\u548c\u7b56\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4><strong>\u5916\u90e8IP\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3059\u308b\u306b\u306f<\/strong><\/h4>\n<p>\u672c\u88fd\u54c1\u3092\u3054\u5229\u7528\u306e\u304a\u5ba2\u69d8\u306f\u3001\u6b21\u306e\u624b\u9806\u3067\u30b5\u30fc\u30d3\u30b9\u304c\u5916\u90e8IP\u3092\u516c\u958b\u3059\u308b\u306e\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u3001\u8a31\u53ef\u3055\u308c\u305fIP\u306e\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>1. Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e<a href=\"https:\/\/docs.paloaltonetworks.com\/prisma\/prisma-cloud\/prisma-cloud-admin-compute\/access_control\/open_policy_agent.html\">\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u3057\u305f\u304c\u3044\u3001\u30af\u30e9\u30b9\u30bf\u3067\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>2. \u300c<a href=\"https:\/\/github.com\/twistlock\/k8s-cve-2020-8554-mitigations\/blob\/main\/PrismaExternalIPs.json\">Mitigation for Kubernetes CVE-2020-8554 \u2013 External IPs<\/a>\u300d\u30eb\u30fc\u30eb\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u30eb\u30fc\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">wget https:\/\/raw.githubusercontent.com\/twistlock\/k8s-cve-2020-8554-mitigations\/main\/PrismaExternalIPs.json<\/pre>\n<p>3. [Defend\/Access\/Admission]\u306b\u79fb\u52d5\u3057\u3001[Import]\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u30eb\u30fc\u30eb\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30c0\u30a4\u30a2\u30ed\u30b0\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002[Add] \u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<p><figure id=\"attachment_110409\" aria-describedby=\"caption-attachment-110409\" style=\"width: 908px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-110410 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/word-image-218.png\" alt=\"[Defend\/Access\/Admission]\u306b\u79fb\u52d5\u3057\u3001[Import]\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u30eb\u30fc\u30eb\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u3053\u306e\u30c0\u30a4\u30a2\u30ed\u30b0\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002[Add] \u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\" width=\"908\" height=\"685\" \/><figcaption id=\"caption-attachment-110409\" class=\"wp-caption-text\">\u56f32 Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u306b\u3088\u308b\u5916\u90e8IP\u306e\u9632\u6b62<\/figcaption><\/figure>4. \u5916\u90e8IP\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u7279\u5b9a\u306eIP\u3092\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3059\u308b\u306b\u306f\u3001\u56f33\u306e\u6982\u8aac\u306b\u3057\u305f\u304c\u3044\u30eb\u30fc\u30eb\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002\u6b21\u306e\u30eb\u30fc\u30eb\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u300c203.54.74.83\u300d\u3092\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_110411\" aria-describedby=\"caption-attachment-110411\" style=\"width: 908px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-110412 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/word-image-219.png\" alt=\"\u5916\u90e8IP\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u7279\u5b9a\u306eIP\u3092\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3059\u308b\u306b\u306f\u3001\u3053\u3053\u306b\u6982\u8aac\u3055\u308c\u3066\u3044\u308b\u3068\u304a\u308a\u306b\u30eb\u30fc\u30eb\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002\u6b21\u306e\u30eb\u30fc\u30eb\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u300c203.54.74.83\u300d\u3092\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3057\u3066\u3044\u307e\u3059\u3002\" width=\"908\" height=\"685\" \/><figcaption id=\"caption-attachment-110411\" class=\"wp-caption-text\">\u56f33 \u7279\u5b9a\u306eIP\u3092\u8a31\u53ef\u3055\u308c\u305f\u5916\u90e8IP\u3068\u3057\u3066\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306b\u767b\u9332<\/figcaption><\/figure>\n<p>\u30eb\u30fc\u30eb\u304c\u9069\u7528\u3055\u308c\u308b\u3068\u3001\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u5916\u90e8IP\u3092\u516c\u958b\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u3092\u8a2d\u5b9a\u3057\u3088\u3046\u3068\u3057\u305f\u3055\u3044\u306b\u305d\u308c\u304c\u5931\u6557\u3057\u3001[Monitor\/Event\/Admission audits]\u3067\u30a2\u30e9\u30fc\u30c8\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><figure id=\"attachment_110413\" aria-describedby=\"caption-attachment-110413\" style=\"width: 1168px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-110414 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/word-image-220.png\" alt=\"\u30eb\u30fc\u30eb\u304c\u9069\u7528\u3055\u308c\u308b\u3068\u3001\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u5916\u90e8IP\u3092\u516c\u958b\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u3092\u8a2d\u5b9a\u3057\u3088\u3046\u3068\u3057\u305f\u3055\u3044\u306b\u305d\u308c\u304c\u5931\u6557\u3057\u3001[Monitor\/Event\/Admission audits]\u3067\u30a2\u30e9\u30fc\u30c8\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u307e\u3059\u3002\" width=\"1168\" height=\"212\" \/><figcaption id=\"caption-attachment-110413\" class=\"wp-caption-text\">\u56f34 \u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u304c\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u5916\u90e8IP\u3092\u516c\u958b\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u3092\u8a2d\u5b9a\u3057\u3088\u3046\u3068\u3057\u305f\u30b5\u30fc\u30d3\u30b9\u3092\u30d6\u30ed\u30c3\u30af<\/figcaption><\/figure><figure id=\"attachment_110415\" aria-describedby=\"caption-attachment-110415\" style=\"width: 1629px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-110416 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/word-image-221.png\" alt=\"\u30eb\u30fc\u30eb\u304c\u9069\u7528\u3055\u308c\u308b\u3068\u3001CVE-2020-8554\u3092\u60aa\u7528\u3057\u3066\u7981\u6b62\u3055\u308c\u3066\u3044\u308b\u5916\u90e8IP\u3092\u516c\u958b\u3059\u308b\u30b5\u30fc\u30d3\u30b9\u3092\u8a2d\u5b9a\u3057\u3088\u3046\u3068\u3057\u305f\u3055\u3044\u306b\u305d\u308c\u304c\u5931\u6557\u3057\u3001[Monitor\/Event\/Admission audits]\u3067\u30a2\u30e9\u30fc\u30c8\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u307e\u3059\u3002\" width=\"1629\" height=\"154\" \/><figcaption id=\"caption-attachment-110415\" class=\"wp-caption-text\">\u56f35 \u60aa\u610f\u304c\u3042\u308b\u53ef\u80fd\u6027\u306e\u3042\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u3088\u3046\u3068\u3059\u308b\u3068\u30a2\u30e9\u30fc\u30c8\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u308b<\/figcaption><\/figure>\u5404\u30a2\u30e9\u30fc\u30c8\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u8a73\u7d30\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4><strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fcIP\u306e\u7591\u308f\u3057\u3044\u66f4\u65b0\u306b\u95a2\u3059\u308b\u30a2\u30e9\u30fc\u30c8<\/strong><\/h4>\n<p>\u901a\u5e38\u3001\u30b7\u30b9\u30c6\u30e0\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u307f\u304c\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fcIP\u3092\u30b5\u30fc\u30d3\u30b9\u306b\u5272\u308a\u5f53\u3066\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u884c\u304a\u3046\u3068\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u30a2\u30ab\u30a6\u30f3\u30c8\u304c\u3042\u308c\u3070\u3001\u305d\u308c\u306f\u30e6\u30fc\u30b6\u30fc\u306b\u3088\u308bCVE-2020-8554\u60aa\u7528\u306e\u8a66\u307f\u3092\u793a\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3054\u81ea\u8eab\u306e\u30af\u30e9\u30b9\u30bf\u306b\u3064\u3044\u3066\u3053\u3046\u3057\u305f\u524d\u63d0\u304c\u5f53\u3066\u306f\u307e\u3089\u306a\u3044\u306e\u3067\u306a\u3044\u304b\u304e\u308a\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u306b\u5f93\u3063\u3066\u30a2\u30e9\u30fc\u30c8\u306b\u9069\u5207\u306a\u30eb\u30fc\u30eb\u30bb\u30c3\u30c8\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<p>1. Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e<a href=\"https:\/\/docs.paloaltonetworks.com\/prisma\/prisma-cloud\/prisma-cloud-admin-compute\/access_control\/open_policy_agent.html\">\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u3057\u305f\u304c\u3044\u3001\u30af\u30e9\u30b9\u30bf\u3067\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>2. <span style=\"font-family: 'courier new', courier, monospace;\">services\/status<\/span>\u3092Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3web\u30d5\u30c3\u30af\u3067\u76e3\u8996\u3059\u308b\u30ea\u30bd\u30fc\u30b9\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3001Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306eWeb\u30d5\u30c3\u30af\u69cb\u6210\u3092\u66f4\u65b0\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">kubectl get ValidatingWebhookConfiguration tw-validating-webhook -o json | jq \u2013arg new \u201cservices\/status\u201d \u2018.webhooks[0].rules[0].resources? += [$new]\u2019 | jq \u2018. | del(.metadata.resourceVersion) | .webhooks[0].rules[0].resources = (.webhooks[0].rules[0].resources | unique)\u2019 | kubectl apply -f \u2013<\/pre>\n<p><strong>\u6ce8\u610f: <\/strong>\u30b5\u30fc\u30d3\u30b9\u66f4\u65b0\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u884c\u3046Prisma Cloud \u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30ab\u30b9\u30bf\u30e0\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u3092\u5c0e\u5165\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u4e0a\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u5f8c\u3001\u305d\u308c\u3089\u306e\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u306b\u3082<span style=\"font-family: 'courier new', courier, monospace;\">services\/status<\/span>\u66f4\u65b0\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u5c4a\u304d\u306f\u3058\u3081\u307e\u3059\u3002\u305d\u308c\u3089\u306e\u30eb\u30fc\u30eb\u306b\u6b21\u306e\u884c\u3092\u8ffd\u52a0\u3059\u308c\u3070<span style=\"font-family: 'courier new', courier, monospace;\">services\/status<\/span>\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u7834\u68c4\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">not input.request[\u201csubResource\u201d]<\/pre>\n<p>3. \u300c<a href=\"https:\/\/github.com\/twistlock\/k8s-cve-2020-8554-mitigations\/blob\/main\/PrismaLoadBalancerIPs.json\">Mitigation for Kubernetes CVE-2020-8554 \u2013 Load Balancer IPs<\/a>\u300d\u30eb\u30fc\u30eb\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u30eb\u30fc\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:default decode:true \">wget https:\/\/raw.githubusercontent.com\/twistlock\/k8s-cve-2020-8554-mitigations\/main\/PrismaLoadBalancerIPs.json<\/pre>\n<p>4. [Defend\/Access\/Admission]\u306b\u79fb\u52d5\u3057\u3001[Import]\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u30eb\u30fc\u30eb\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30c0\u30a4\u30a2\u30ed\u30b0\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002[Add] \u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n<p><figure id=\"attachment_110417\" aria-describedby=\"caption-attachment-110417\" style=\"width: 908px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-110418 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/word-image-222.png\" alt=\"[Defend\/Access\/Admission]\u306b\u79fb\u52d5\u3057\u3001[Import]\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u30eb\u30fc\u30eb\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u3053\u306e\u30c0\u30a4\u30a2\u30ed\u30b0\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002[Add] \u3092\u30af\u30ea\u30c3\u30af\u3057\u307e\u3059\u3002\" width=\"908\" height=\"685\" \/><figcaption id=\"caption-attachment-110417\" class=\"wp-caption-text\">\u56f36 Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u30a2\u30c9\u30df\u30c3\u30b7\u30e7\u30f3\u30eb\u30fc\u30eb\u306b\u3088\u308bLoad Balancer IP\u306e\u9632\u6b62<\/figcaption><\/figure>5. \u7279\u5b9a\u30a2\u30ab\u30a6\u30f3\u30c8\u3067Load Balancer IP\u3092\u69cb\u6210\u3059\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u5916\u90e8IP\u30eb\u30fc\u30eb\u3067\u5b9f\u88c5\u3057\u305fIP\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306e\u3084\u308a\u65b9\u3092\u8e0f\u8972\u3057\u307e\u3059\u3002<\/p>\n<p>\u30eb\u30fc\u30eb\u304c\u9069\u7528\u3055\u308c\u308b\u3068\u3001Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306f\u3001Load Balancer\u30b5\u30fc\u30d3\u30b9\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u306b\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u30a2\u30ab\u30a6\u30f3\u30c8\u304b\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5bfe\u3057\u3001\u30a2\u30e9\u30fc\u30c8\u3092\u767a\u51fa\u3057\u307e\u3059\u3002\u30a2\u30e9\u30fc\u30c8\u306f[Monitor\/Event\/Admission audits]\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u5404\u30a2\u30e9\u30fc\u30c8\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u8a73\u7d30\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_110428\" aria-describedby=\"caption-attachment-110428\" style=\"width: 1629px\" class=\"wp-caption aligncenter\"><img  class=\"size-full wp-image-110429 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2020\/12\/Updated-Image.png\" alt=\"\u30a2\u30e9\u30fc\u30c8\u306f[Monitor\/Event\/Admission audits]\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u5404\u30a2\u30e9\u30fc\u30c8\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u8a73\u7d30\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002 \" width=\"1629\" height=\"154\" \/><figcaption id=\"caption-attachment-110428\" class=\"wp-caption-text\">\u56f37 Prisma Cloud\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u304cLoad Balancer IP\u3092\u30b5\u30fc\u30d3\u30b9\u306b\u8ffd\u52a0\u3057\u3088\u3046\u3068\u3059\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u30a2\u30e9\u30fc\u30c8\u3092\u767a\u51fa<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 2020\u5e7412\u67084\u65e5\u3001Kubernetes Product Security Committee\u306f\u65b0\u305f\u306aKubernetes\u306e\u8106\u5f31\u6027\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u8106\u5f31\u6027\u306b\u306f\u8b58\u5225\u756a\u53f7 CVE-2020-8554 \u304c\u4ed8\u4e0e\u3055\u308c\u3066\u3044<\/p>\n","protected":false},"author":323,"featured_media":134416,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4469,4436,4428,4470],"tags":[6174,4789],"product_categories":[4345,4458,4459],"coauthors":[1484],"class_list":["post-110431","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vulnerabilities","category-cloud-cybersecurity-research-ja","category-threat-research-ja","category-vulnerabilities-ja","tag-cve-2020-8554","tag-kubernetes-ja","product_categories-prisma-cloud","product_categories-prisma-cloud-ja","product_categories-prisma-cloud-compute-ja"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u672a\u4fee\u6b63\u306eKubernetes\u4e2d\u9593\u8005\u653b\u6483\u8106\u5f31\u6027\u304b\u3089\u306e\u4fdd\u8b77 (CVE-2020-8554)<\/title>\n<meta name=\"description\" content=\"\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u306f\u30d1\u30c3\u30c1\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u306a\u3044\u3001\u4e2d\u7a0b\u5ea6\u306e\u6df1\u523b\u5ea6\u306e\u8106\u5f31\u6027\u304cKubernetes\u306e\u5168\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3064\u3044\u3066\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u672c\u8106\u5f31\u6027\u306b\u306f CVE-2020-8554\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u3001\u8907\u6570\u306e\u7de9\u548c\u7b56\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unit42.paloaltonetworks.com\/ja\/cve-2020-8554\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u672a\u4fee\u6b63\u306eKubernetes\u4e2d\u9593\u8005\u653b\u6483\u8106\u5f31\u6027\u304b\u3089\u306e\u4fdd\u8b77 (CVE-2020-8554)\" \/>\n<meta property=\"og:description\" content=\"\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u306f\u30d1\u30c3\u30c1\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u306a\u3044\u3001\u4e2d\u7a0b\u5ea6\u306e\u6df1\u523b\u5ea6\u306e\u8106\u5f31\u6027\u304cKubernetes\u306e\u5168\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3064\u3044\u3066\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u672c\u8106\u5f31\u6027\u306b\u306f CVE-2020-8554\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u3001\u8907\u6570\u306e\u7de9\u548c\u7b56\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/unit42.paloaltonetworks.com\/ja\/cve-2020-8554\/\" \/>\n<meta property=\"og:site_name\" content=\"Unit 42\" \/>\n<meta property=\"article:published_time\" content=\"2020-12-22T03:30:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-12-28T00:33:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2024\/06\/05_Vulnerabilities_1920x900.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Yuval Avrahami\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\u672a\u4fee\u6b63\u306eKubernetes\u4e2d\u9593\u8005\u653b\u6483\u8106\u5f31\u6027\u304b\u3089\u306e\u4fdd\u8b77 (CVE-2020-8554)","description":"\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u306f\u30d1\u30c3\u30c1\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u306a\u3044\u3001\u4e2d\u7a0b\u5ea6\u306e\u6df1\u523b\u5ea6\u306e\u8106\u5f31\u6027\u304cKubernetes\u306e\u5168\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u3064\u3044\u3066\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u672c\u8106\u5f31\u6027\u306b\u306f CVE-2020-8554\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u3001\u8907\u6570\u306e\u7de9\u548c\u7b56\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/unit42.paloaltonetworks.com\/ja\/cve-2020-8554\/","og_locale":"ja_JP","og_type":"article","og_title":"\u672a\u4fee\u6b63\u306eKubernetes\u4e2d\u9593\u8005\u653b\u6483\u8106\u5f31\u6027\u304b\u3089\u306e\u4fdd\u8b77 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