{"id":101554,"date":"2019-08-28T12:00:22","date_gmt":"2019-08-28T19:00:22","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=101554\/"},"modified":"2019-11-28T17:31:21","modified_gmt":"2019-11-29T01:31:21","slug":"non-root-containers-kubernetes-cve-2019-11245-care","status":"publish","type":"post","link":"https:\/\/origin-unit42.paloaltonetworks.com\/ja\/non-root-containers-kubernetes-cve-2019-11245-care\/","title":{"rendered":"\u30b3\u30f3\u30c6\u30ca\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092root\u3068\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u306a\u305c\u554f\u984c\u306a\u306e\u304b Kubernets\u306eCVE-2019-11245\u3092\u4f8b\u306b\u8003\u3048\u308b"},"content":{"rendered":"

\u6982\u8981<\/h2>\n

5\u670831\u65e5\u3001Kubernetes Product Security Committee\u306f\u3001Kubernetes\u306e\u30bb\u30ad\u30e5<\/a>\u30ea<\/a>\u30c6\u30a3<\/a> \u30ea\u30b0\u30ec\u30c3\u30b7\u30e7\u30f3<\/a>(CVE-2019-11245\u3092\u5272\u308a\u5f53\u3066\u6e08\u307f)\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u554f\u984c\u306f\u300c\u975eroot\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u306e\u52d5\u4f5c\u304c\u60f3\u5b9a\u3055\u308c\u3066\u3044\u308b\u30a4\u30e1\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u30b3\u30f3\u30c6\u30ca\u304c\u3001\u5f53\u8a72\u30a4\u30e1\u30fc\u30b8\u306e2\u5ea6\u76ee\u306e\u4f7f\u7528\u306a\u3044\u3057\u30b3\u30f3\u30c6\u30ca\u306e\u518d\u8d77\u52d5\u306b\u3088\u308aroot\u3068\u3057\u3066\u52d5\u4f5c\u3057\u3066\u3057\u307e\u3046\u300d\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n

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<\/a>\u975eroot\u30b3\u30f3\u30c6\u30ca<\/h2>\n

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\u305d\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u6a29\u9650\u3092root\u30e6\u30fc\u30b6\u30fc\u306b\u6607\u683c\u3055\u305b\u306a\u304f\u3066\u3082\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u4e00\u90e8\u306e\u30b3\u30f3\u30c6\u30ca \u30a8\u30b9\u30b1\u30fc\u30d7\u306e\u8106\u5f31\u6027\u306f\u3001root\u6a29\u9650\u3055\u3048\u3042\u308c\u3070\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002<\/p>\n

\u3053\u3053\u6570\u5e74\u3067\u3001Kubernetes\u3068Docker\u3092\u542b\u3080\u30b3\u30f3\u30c6\u30ca \u30a8\u30f3\u30b8\u30f3\u3067\u3001\u8907\u6570\u306e\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8\u8106\u5f31\u6027\u304c\u660e\u3089\u304b\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002CVE-2016-9962\u306f\u305d\u306e1\u3064\u306e\u4f8b\u3067\u3059\u3002\u3053\u308c\u306frunc 2<\/sup>\u306e\u8106\u5f31\u6027\u3067\u3042\u308a\u3001\u30b3\u30f3\u30c6\u30ca \u30d7\u30ed\u30bb\u30b9\u306e\u30b1\u30fc\u30d1\u30d3\u30ea\u30c6\u30a3\u304c\u524a\u9664\u3055\u308c\u308b\u524d\u306b\u305d\u308c\u3089\u306e\u30d5\u30a1\u30a4\u30eb\u8a18\u8ff0\u5b50\u3092\u30db\u30b9\u30c8\u304b\u3089\u30b0\u30e9\u30d6\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u30b3\u30f3\u30c6\u30ca \u30d7\u30ed\u30bb\u30b9\u304c\u30db\u30b9\u30c8\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u6b20\u9665\u3092\u5229\u7528\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u306e\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u3092root\u3068\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3057\u305f\u3002\u4eca\u5e74\u524d\u534a\u306b\u898b\u3064\u304b\u3063\u305f\u540c\u69d8\u306erunc\u8106\u5f31\u6027\u3067\u3042\u308bCVE-2019-5736\u3082\u3001\u60aa\u610f\u306e\u3042\u308b\u30b3\u30f3\u30c6\u30ca \u30d7\u30ed\u30bb\u30b9\u304croot\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u8a73\u7d30\u306f\u3001Yuval Avrahami\u306e\u5229\u7528\u65b9\u6cd5\u306b\u95a2\u3059\u308b\u8a18\u4e8b<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

<\/a>\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u3068rootless\u30b3\u30f3\u30c6\u30ca<\/h3>\n

\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593<\/a>\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u306eroot\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u8a2d\u8a08\u3055\u308c\u305f\u6700\u65b0\u306eLinux\u30ab\u30fc\u30cd\u30eb\u6a5f\u80fd\u3067\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30e6\u30fc\u30b6\u30fcID\u3068\u30b0\u30eb\u30fc\u30d7ID<\/strong>\u3092\u5206\u96e2\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30ab\u30fc\u30cd\u30eb\u6a5f\u80fd\u306f\u3001UID\u3068GID\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u3001\u30db\u30b9\u30c8\u306e\u30e6\u30fc\u30b6\u30fc\u3068\u30b0\u30eb\u30fc\u30d7\u3092\u30b3\u30f3\u30c6\u30ca\u5185\u306e\u30e6\u30fc\u30b6\u30fc\u3068\u30b0\u30eb\u30fc\u30d7\u3068\u533a\u5225\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u306fUID 0 (root)\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u3068\u540c\u6642\u306b\u3001\u30db\u30b9\u30c8\u4e0a\u3067\u306fUID 100000 (\u307e\u305f\u306f\u4ed6\u306e\u4efb\u610f\u306eUID)\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u30d6\u30ec\u30a4\u30af\u30a2\u30a6\u30c8\u3057\u3066\u3082\u3001\u30ab\u30fc\u30cd\u30eb\u306f\u305d\u306e\u6709\u52b9\u30e6\u30fc\u30b6\u30fc\u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u975eroot\u30e6\u30fc\u30b6\u30fcID\u3068\u3057\u3066\u6271\u3046\u306e\u3067\u3001\u305d\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u30db\u30b9\u30c8\u4e0a\u3067root\u6a29\u9650\u3092\u6301\u3064\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u512a\u308c\u305f\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n

\u3057\u304b\u3057\u3001\u73fe\u5728\u306e\u4e3b\u8981\u306a\u30b3\u30f3\u30c6\u30ca \u30e9\u30f3\u30bf\u30a4\u30e0\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u614e\u91cd\u3067\u3059\u3002\u3053\u306e\u6a5f\u80fd\u304cLinux 3.8\u3067\u30ab\u30fc\u30cd\u30eb\u306b\u8ffd\u52a0\u3055\u308c\u305f\u306e\u306f2013\u5e74\u306e\u3053\u3068\u3067\u3042\u308a\u3001Docker\u304c\u521d\u3081\u3066\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u3092\u7d44\u307f\u8fbc<\/a>\u3093<\/a>\u3060<\/a>\u306e\u306f2015\u5e74\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u5f8cDocker\u3067\u3053\u308c\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u6a5f\u80fd\u3068\u3057\u3066\u6709\u52b9\u306b\u3055\u308c\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u304a\u305d\u3089\u304f\u3001\u3053\u306e\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u5236\u9650<\/a>\u304c\u751f\u3058\u308b\u305f\u3081\u3060\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5916\u90e8\u306e\u30dc\u30ea\u30e5\u30fc\u30e0\u307e\u305f\u306f\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u30c9\u30e9\u30a4\u30d0\u306f\u3001\u30e6\u30fc\u30b6\u30fc \u30de\u30c3\u30d4\u30f3\u30b0\u3092\u8a8d\u8b58\u3057\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u30db\u30b9\u30c8\u304b\u3089\u30d5\u30a1\u30a4\u30eb\u3092\u30de\u30a6\u30f3\u30c8\u3059\u308b\u51e6\u7406\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u6a29\u9650\u306e\u305f\u3081\u306b\u8907\u96d1\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u305d\u306e\u4e00\u65b9\u3067\u3001\u73fe\u5728\u306erootless\u30b3\u30f3\u30c6\u30ca<\/strong>\u306e\u5b9f\u88c5\u306f\u3059\u3079\u3066\u3001\u305d\u306e\u4e2d\u6838\u90e8\u5206\u3067\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002rootless\u30b3\u30f3\u30c6\u30ca\u3092\u3001\u3053\u306e\u8a18\u4e8b\u3067\u975eroot\u30b3\u30f3\u30c6\u30ca\u3068\u547c\u3093\u3067\u3044\u308b\u30b3\u30f3\u30c6\u30ca\u3068\u6df7\u540c\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002rootless\u30b3\u30f3\u30c6\u30ca\u306f\u3001\u30db\u30b9\u30c8\u4e0a\u306e\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u304c\u5b9f\u884c\u3057\u3001\u7ba1\u7406\u3067\u304d\u308b\u30b3\u30f3\u30c6\u30ca\u3067\u3059\u3002Docker\u3084\u4ed6\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3067\u306f\u30c7\u30fc\u30e2\u30f3\u306froot\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001rootless\u30b3\u30f3\u30c6\u30ca\u306f\u4efb\u610f\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u30b1\u30fc\u30d1\u30d3\u30ea\u30c6\u30a3\u3092\u8ffd\u52a0\u3057\u306a\u304f\u3066\u3082\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n

rootless\u30b3\u30f3\u30c6\u30ca\u306f\u3001\u5f93\u6765\u306e\u30b3\u30f3\u30c6\u30ca\u306b\u6bd4\u3079\u3066\u591a\u5c11\u6709\u5229\u306a\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u5171\u6709\u30de\u30b7\u30f3\u4e0a\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u7ba1\u7406\u8005\u6a29\u9650\u304c\u306a\u304f\u3066\u3082\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059(\u5927\u5b66\u306e\u7814\u7a76\u5ba4\u306a\u3069)\u3002\u307e\u305f\u3001(\u975e\u7279\u6a29\u30b3\u30f3\u30c6\u30ca\u3067\u3042\u3063\u3066\u3082)\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5b9f\u969b\u306brootless\u30b3\u30f3\u30c6\u30ca\u3092\u8a2d\u8a08\u3059\u308b\u4e3b\u306a\u52d5\u6a5f\u306f\u3001\u30b3\u30f3\u30c6\u30ca \u30e9\u30f3\u30bf\u30a4\u30e0\u306e\u524d\u8ff0\u306e\u8106\u5f31\u6027\u306e\u30ea\u30b9\u30af\u3092\u7de9\u548c\u3059\u308b\u3053\u3068\u3067\u3059\u30023<\/sup><\/p>\n

rootless\u30b3\u30f3\u30c6\u30ca\u306f\u3001\u63a1\u7528\u3055\u308c\u308b\u50be\u5411\u304c\u9ad8\u307e\u3063\u3066\u3044\u307e\u3059\u3002runc\u3084Docker\u306a\u3069\u306e\u4e3b\u8981\u306a\u30b3\u30f3\u30c6\u30ca \u30c4\u30fc\u30eb\u306f\u3001rootless\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u306erootless\u30b3\u30f3\u30c6\u30ca\u3092\u4f7f\u7528\u3067\u304d\u308b\u65b0\u3057\u3044\u30b3\u30f3\u30c6\u30ca \u30a8\u30f3\u30b8\u30f3\u3084\u30a4\u30e1\u30fc\u30b8 \u30d3\u30eb\u30c0\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30e2\u30f3\u30ec\u30b9 \u30b3\u30f3\u30c6\u30ca \u30a8\u30f3\u30b8\u30f3\u306ePod<\/a>m<\/a>an<\/a>\u306f\u3001rootless\u30b3\u30f3\u30c6\u30ca\u3060\u3051\u3067Docker<\/a>\u306e\u4ee3\u308f<\/a>\u308a<\/a>\u306b\u306a\u308b<\/a>\u5341\u5206\u306a\u30ec\u30d9\u30eb\u306b\u9054\u3057\u3066\u3044\u308b\u3068\u601d\u308f\u308c\u307e\u3059\u3002<\/p>\n

\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u306f\u3053\u306e\u8a18\u4e8b\u306e\u8ad6\u70b9\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5f93\u6765\u306e\u975eroot\u30b3\u30f3\u30c6\u30ca\u306b\u6bd4\u3079\u3066\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u5229\u70b9\u304c\u5f97\u3089\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u8a00\u53ca\u3059\u308b\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u3092\u4f7f\u7528\u3057\u306a\u3044\u5834\u5408\u3001\u30b3\u30f3\u30c6\u30ca \u30d7\u30ed\u30bb\u30b9\u3092root\u306a\u3057\u3067\u5b9f\u884c\u3057\u305f\u3068\u3057\u3066\u3082\u3001\u30b3\u30f3\u30c6\u30ca\u306b\u6a29\u9650\u6607\u683c\u306e\u8106\u5f31\u6027\u304c\u3042\u308c\u3070\u3001\u30db\u30b9\u30c8\u304c\u4fb5\u5bb3\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u60aa\u610f\u306e\u3042\u308b\u30b3\u30f3\u30c6\u30ca \u30d7\u30ed\u30bb\u30b9\u306f\u3001\u8106\u5f31\u306asetuid\u30d0\u30a4\u30ca\u30ea\u3092\u5229\u7528\u3057\u3066root\u306b\u306a\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u3067root\u30e6\u30fc\u30b6\u30fc\u304c\u30db\u30b9\u30c8\u4e0a\u306e\u975eroot\u30e6\u30fc\u30b6\u30fc\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u4e0d\u53ef\u80fd\u3067\u3059\u3002<\/p>\n

<\/a>\u975eroot\u30b3\u30f3\u30c6\u30ca\u306e\u30d3\u30eb\u30c9\u3068\u5b9f\u884c<\/h3>\n

Docker\u3067\u306f\u3001Dockerbuild\u30d5\u30a1\u30a4\u30eb\u3067USE<\/a>R<\/a>\u547d\u4ee4<\/a>\u3092\u4f7f\u7528\u3057\u3066\u3001\u305d\u308c\u4ee5\u964d\u306e\u3059\u3079\u3066\u306e\u30b3\u30de\u30f3\u30c9\u3067\u4f7f\u7528\u3059\u308bUID\u3092\u6307\u5b9a\u3057\u305f\u5024\u306b\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u6700\u5f8c\u306b\u5b9f\u884c\u3057\u305fUSER\u547d\u4ee4\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u304c\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u3069\u306eUID\u3067\u52d5\u4f5c\u3059\u308b\u306e\u304b\u3082\u6307\u5b9a\u3057\u307e\u3059\u3002\u591a\u304f\u306e\u30b3\u30f3\u30c6\u30ca\u306f\u3001\u305d\u306e\u3059\u3079\u3066\u306e\u30d3\u30eb\u30c9 \u30ed\u30b8\u30c3\u30af\u3092root\u3068\u3057\u3066\u5b9f\u884c\u3057\u3001\u30d3\u30eb\u30c9 \u30d5\u30a1\u30a4\u30eb\u306e\u7d42\u4e86\u524d\u306b\u3053\u306e\u547d\u4ee4\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n

Docker\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c--us<\/a>e<\/a>r<\/a> flag<\/a>\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b3\u30f3\u30c6\u30ca\u5185\u3067\u7279\u5b9a\u306eUID\u3067\u30a4\u30e1\u30fc\u30b8\u307e\u305f\u306f\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

Kubernetes\u3067\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6<\/a>\u30a3<\/a> \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8<\/a>\u307e\u305f\u306f\u30dd\u30c3\u30c9 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30dd\u30ea\u30b7\u30fc<\/a>\u306erunAsUser\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u901a\u3058\u3066\u3001\u7279\u5b9a\u306eUID\u3067\u30dd\u30c3\u30c9\u307e\u305f\u306f\u30b3\u30f3\u30c6\u30ca\u304c\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u5236\u9650\u3067\u304d\u307e\u3059\u3002\u30dd\u30c3\u30c9 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \u30dd\u30ea\u30b7\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001MustRunAs\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u9078\u629e\u3057\u305f\u7bc4\u56f2\u5185\u306eUID\u3067\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u30b3\u30f3\u30c6\u30ca\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u3084\u3001MustRunAsNonRoot\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30f3\u30c6\u30ca\u304croot\u3068\u3057\u3066\u52d5\u4f5c\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

<\/a>CVE-2019-11245\u306eKubernetes\u306e\u554f\u984c<\/h2>\n

Kubelet v1.13.6\u3068v1.14.2\u306e\u30ea\u30ea\u30fc\u30b9\u4ee5\u964d\u3001\u8907\u6570\u306eKubernetes\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u3001\u975eroot\u30b3\u30f3\u30c6\u30ca\u304c\u305d\u306e2\u56de\u76ee\u306e\u5b9f\u884c\u304b\u3089root\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u3068\u3044\u3046\u82e6\u60c5\u304c\u3042\u308a\u307e\u3057\u305f\u30024<\/sup>\u3053\u306e\u554f\u984c\u3092\u8abf\u67fb\u3057\u305f\u3068\u3053\u308d\u3001\u3053\u308c\u306fDocker\u30b3\u30f3\u30c6\u30ca\u3092\u5b9f\u884c\u3059\u308bKubernetes\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308bdockershim\u306b\u56fa\u6709\u306e\u554f\u984c\u3067\u3042\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f\u3002<\/p>\n

USER\u547d\u4ee4\u3092\u4f7f\u7528\u3057\u3066\u975eroot\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u30d3\u30eb\u30c9\u3055\u308c\u305fDocker\u30b3\u30f3\u30c6\u30ca\u304c\u3001\u305d\u306e2\u56de\u76ee\u306e\u5b9f\u884c\u304b\u3089Kubernetes\u306b\u3088\u3063\u3066root\u3068\u3057\u3066\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u3082\u3061\u308d\u3093\u3001\u3053\u308c\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u554f\u984c\u3067\u3057\u305f\u3002\u30b3\u30f3\u30c6\u30ca\u3067root\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u3053\u3068\u306b\u3064\u3044\u3066\u524d\u8ff0\u3057\u305f\u5371\u967a\u306e\u307b\u304b\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u3001\u30e6\u30fc\u30b6\u30fc\u69cb\u6210\u306b\u4f9d\u5b58\u3057\u305f\u8a2d\u8a08\u3092\u884c\u3063\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u3001root\u6a29\u9650\u3092\u6301\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u77e5\u3063\u3066\u3001\u30dc\u30ea\u30e5\u30fc\u30e0\u3092\u30b3\u30f3\u30c6\u30ca\u306b\u516c\u958b\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u554f\u984c\u306f\u3001\u30a4\u30e1\u30fc\u30b8UID\u306e\u691c\u51fa\u3092\u4e2d\u65ad\u3057\u3066\u3044\u305fKubelet\u30b3\u30fc\u30c9\u306e\u7279\u5b9a<\/a>\u306e<\/a>\u30b3\u30df\u30c3\u30c8<\/a>\u3092\u5143\u306b\u623b\u3059<\/a>\u3053\u3068\u306b\u3088\u3063\u3066\u3059\u3050\u306b\u4fee\u6b63\u3055\u308c\u307e\u3057\u305f\u3002\u4e2d\u65ad\u3055\u308c\u305f\u30ed\u30b8\u30c3\u30af\u306f\u3001\u305d\u306eDocker\u30a4\u30e1\u30fc\u30b8\u304c\u4ee5\u524d\u30ce\u30fc\u30c9\u306b\u30d7\u30eb\u3055\u308c\u3066\u3044\u305f\u5834\u5408\u306e\u307f\u5b9f\u884c\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u3053\u306e\u30d0\u30b0\u304c2\u56de\u76ee\u4ee5\u964d\u306e\u5b9f\u884c\u6642\u306e\u307f\u767a\u751f\u3057\u3066\u3044\u305f\u7406\u7531\u3092\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8106\u5f31\u6027\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308b\u306e\u306f\u3001\u3053\u306e\u30b3\u30df\u30c3\u30c8\u3092\u4f7f\u7528\u3059\u308b2\u3064\u306eKubelet\u306e\u30ea\u30ea\u30fc\u30b9(v1.13.6\u3068v1.14.2)\u306e\u307f\u3067\u3057\u305f\u3002<\/p>\n

<\/a>\u6ce8\u610f\u70b9<\/h2>\n

\u30b3\u30f3\u30c6\u30ca\u306f\u3001\u901a\u5e38\u306f\u8cac\u4efb\u3068\u30b1\u30fc\u30d1\u30d3\u30ea\u30c6\u30a3\u304c\u5236\u9650\u3055\u308c\u3066\u3044\u308b\u3068\u3044\u3046\u6027\u8cea\u304b\u3089\u3001\u6700\u5c0f\u6a29\u9650\u306e\u539f\u5247\u306b\u5f93\u3063\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30b3\u30f3\u30c6\u30ca\u3067\u53b3\u5bc6\u306b\u306froot\u3092\u5fc5\u8981\u3068\u3057\u306a\u3044\u5834\u5408\u306froot\u306e\u4f7f\u7528\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u3055\u3089\u306b\u9ad8\u3081\u3001\u30b3\u30f3\u30c6\u30ca \u30a8\u30f3\u30b8\u30f3\u3067\u898b\u3064\u304b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u6b20\u9665\u3092\u653b\u6483\u8005\u304c\u5229\u7528\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u305d\u3046\u9060\u304f\u306a\u3044\u5c06\u6765\u306b\u30b3\u30f3\u30c6\u30ca \u30e9\u30f3\u30bf\u30a4\u30e0\u3067\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u30e6\u30fc\u30b6\u30fc\u540d\u524d\u7a7a\u9593\u306e\u30b5\u30dd\u30fc\u30c8\u304c\u6709\u52b9\u306b\u306a\u308a\u3001rootless\u30b3\u30f3\u30c6\u30ca\u304c\u4e3b\u6d41\u3068\u3057\u3066\u63a1\u7528\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u4fe1\u3058\u308b\u3060\u3051\u306e\u5341\u5206\u306a\u7406\u7531\u304c\u3042\u308a\u307e\u3059\u3002\u78ba\u304b\u306b\u3001\u73fe\u5728\u306e\u5b9f\u88c5\u306b\u306f\u308f\u305a\u304b\u306b\u5236\u9650\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u308c\u3089\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u7bc4\u56f2\u304c\u62e1\u5927\u3059\u308b\u306b\u3064\u308c\u3066\u3001\u3059\u3050\u306b\u958b\u767a\u8005\u304c\u5236\u9650\u3092\u89e3\u6d88\u3057\u3066\u304f\u308c\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n

1<\/sup>https:\/\/docs.openshift.com\/container-platform\/3.3\/creating_images\/guidelines.html#use-uid<\/a>
\n2<\/sup>\u73fe\u5728Docker\u3067\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u30b3\u30f3\u30c6\u30ca \u30e9\u30f3\u30bf\u30a4\u30e0\u5411\u3051OCI\u5b9f\u88c5\u306b\u3064\u3044\u3066\u306f\u3001GitHub<\/a>\u3092\u53c2\u7167\u3002
\n3<\/sup>Rootless Containers<\/a>\u3001DevConf.CZ (Jan 25, 2019)\u3001Giuseppe Scrivano\u304a\u3088\u3073Akihiro Suda
\n4<\/sup>https:\/\/github.com\/kubernetes\/kubernetes\/pull\/78178<\/a>\u3001https:\/\/github.com\/kubernetes\/kubernetes\/issues\/78175<\/a>\u3001\u304a\u3088\u3073https:\/\/github.com\/kubernetes\/kubernetes\/issues\/78308<\/a>\u3092\u53c2\u7167\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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