{"id":20284,"date":"2026-08-03T11:50:45","date_gmt":"2026-08-03T09:50:45","guid":{"rendered":"https:\/\/webhosting.de\/linux-capabilities-root-rechte-granular-aufteilen-sicherheitskonzept\/"},"modified":"2026-08-03T11:50:45","modified_gmt":"2026-08-03T09:50:45","slug":"linux%e3%81%ae%e3%82%ad%e3%83%a3%e3%83%91%e3%83%93%e3%83%aa%e3%83%86%e3%82%a3%e3%80%81root%e6%a8%a9%e9%99%90%e3%80%81%e3%81%8d%e3%82%81%e7%b4%b0%e3%81%8b%e3%81%aa%e6%a8%a9%e9%99%90%e5%88%86%e5%89%b2","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/linux-capabilities-root-rechte-granular-aufteilen-sicherheitskonzept\/","title":{"rendered":"Linux\u306e\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\uff1aroot\u6a29\u9650\u3092\u5b89\u5168\u304b\u3064\u304d\u3081\u7d30\u304b\u304f\u5272\u308a\u5f53\u3066\u308b"},"content":{"rendered":"<p>Linux\u306eCapabilities\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001root\u6a29\u9650\u3092\u5c0f\u3055\u304f\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u6a29\u9650\u306b\u5206\u5272\u3057\u3001\u30ea\u30b9\u30af\u3092\u5927\u5e45\u306b\u4f4e\u6e1b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u7279\u5b9a\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3067\u304d\u308b\u304b\u3092\u7684\u78ba\u306b\u5236\u5fa1\u3057\u3001\u5404\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u653b\u6483\u5bfe\u8c61\u9818\u57df\u3092\u5236\u9650\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<ul>\n  <li><strong>\u5fae\u7c92\u72b6<\/strong> \u300c\u5168\u6a29\u9650\u300d\u3067\u306f\u306a\u304f\u3001root\u6a29\u9650\u3092\u7d30\u304b\u3044\u6a29\u9650\u306b\u5206\u5272\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd<\/strong> Set-UID\u306e\u4ee3\u308f\u308a\u306b\u3001\u5fc5\u8981\u306a\u6a29\u9650\u3092\u30d0\u30a4\u30ca\u30ea\u30d5\u30a1\u30a4\u30eb\u306b\u76f4\u63a5\u7d10\u4ed8\u3051\u308b\u3002.<\/li>\n  <li><strong>\u6a5f\u80fd\u30bb\u30c3\u30c8<\/strong> \u5236\u5fa1\uff1aPermitted\u3001Effective\u3001Inheritable\u3001Bounding \u3092\u610f\u56f3\u7684\u306b\u8a2d\u5b9a\u3059\u308b\u3002.<\/li>\n  <li><strong>\u7279\u6a29\u306e\u5206\u96e2<\/strong>: \u30b5\u30fc\u30d3\u30b9\u3001\u30c4\u30fc\u30eb\u3001\u30bf\u30b9\u30af\u3092\u53b3\u683c\u306b\u5206\u96e2\u3059\u308b\u3002.<\/li>\n  <li><strong>\u5fb9\u5e95\u3057\u305f\u30c7\u30a3\u30d5\u30a7\u30f3\u30b9<\/strong>: sudo\u3001\u30ed\u30fc\u30eb\u3001\u30ed\u30b0\u306b\u3088\u308b\u6a5f\u80fd\u306e\u62e1\u5f35\u3002.<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux-serververwaltung-8291.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u306a\u305croot\u6a29\u9650\u3092\u5206\u96e2\u3059\u308b\u306e\u3067\u3059\u304b\uff1f<\/h2>\n\n<p>\u30eb\u30fc\u30c8\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u306f\u4ee5\u4e0b\u306e\u6a29\u9650\u304c\u4e0e\u3048\u3089\u308c\u307e\u3059 <strong>\u30d5\u30eb\u30a2\u30af\u30bb\u30b9<\/strong> \u30d5\u30a1\u30a4\u30eb\u3084\u30d7\u30ed\u30bb\u30b9\u306e\u4e16\u754c\u306b\u304a\u3044\u3066\u3001\u3057\u304b\u3057\u305d\u308c\u3053\u305d\u304c\u91cd\u5927\u306a\u30a8\u30e9\u30fc\u3092\u62db\u304f\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u305f\u3063\u305f\u4e00\u3064\u306e\u8aa4\u3063\u305f\u30b3\u30de\u30f3\u30c9\u3084\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u304c\u30c0\u30a6\u30f3\u3057\u3066\u3057\u307e\u3046\u306e\u3067\u3059\u3002 \u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u5e83\u7bc4\u56f2\u306b\u308f\u305f\u308b\u64cd\u4f5c\u3092\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u305d\u308c\u306b\u3088\u3063\u3066\u88ab\u5bb3\u306e\u898f\u6a21\u3068\u5fa9\u65e7\u6642\u9593\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3066\u3044\u307e\u3059\u3002\u300c\u6700\u5c0f\u6a29\u9650\u306e\u539f\u5247\u300d\u306b\u5f93\u3046\u3053\u3068\u3067\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u30b3\u30f3\u30d1\u30af\u30c8\u304b\u3064\u7ba1\u7406\u3057\u3084\u3059\u3044\u72b6\u614b\u306b\u4fdd\u3061\u307e\u3059\u3002\u307e\u305f\u3001root\u306b\u3088\u308b\u76f4\u63a5\u30ed\u30b0\u30a4\u30f3\u3092\u7121\u52b9\u306b\u3057\u3001\u30ed\u30fc\u30eb\u30d9\u30fc\u30b9\u306e\u7ba1\u7406\u3092\u63a1\u7528\u3057\u3001\u5b8c\u5168\u306a\u30ed\u30b0\u3092\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>Linux\u306e\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u306b\u3064\u3044\u3066\u7c21\u5358\u306b\u89e3\u8aac<\/h2>\n\n<p>Linux\u306e\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u306f\u3001\u5f93\u6765\u306eroot\u6a29\u9650\u3092\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u305f <strong>\u7279\u5178<\/strong>. \u5404\u30d7\u30ed\u30bb\u30b9\u306b\u306f\u3001\u305d\u306e\u30bf\u30b9\u30af\u306b\u672c\u5f53\u306b\u5fc5\u8981\u306a\u69cb\u6210\u8981\u7d20\u306e\u307f\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u30011024\u672a\u6e80\u306e\u30dd\u30fc\u30c8\u3078\u306e\u30d0\u30a4\u30f3\u30c9\u3084\u3001\u7279\u5b9a\u306e\u30b7\u30b0\u30ca\u30eb\u306e\u9001\u4fe1\u306a\u3069\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4ee5\u524d\u306e\u300c\u3059\u3079\u3066\u304b\u3001\u3042\u308b\u3044\u306f\u4f55\u3082\u306a\u3057\u300d\u3068\u3044\u3046\u65b9\u5f0f\u3092\u56de\u907f\u3057\u3066\u3044\u307e\u3059\u3002 \u30ab\u30fc\u30cd\u30eb\u306f\u30d7\u30ed\u30bb\u30b9\u3054\u3068\u306b\u3053\u308c\u3089\u306e\u69cb\u6210\u8981\u7d20\u3092\u7ba1\u7406\u3057\u3001\u53b3\u683c\u306b\u9069\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5236\u5fa1\u306f\u304d\u3081\u7d30\u304b\u304f\u3001\u8ffd\u8de1\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n<p>\u6280\u8853\u7684\u306b\u306f\u3001\u30b9\u30ad\u30eb\u3092\u4ee5\u4e0b\u306e\u3044\u305a\u308c\u304b\u306b\u7d50\u3073\u3064\u3051\u3066\u3044\u307e\u3059 <strong>\u30d7\u30ed\u30bb\u30b9<\/strong> \uff08\u305d\u306e\u6a5f\u80fd\u30bb\u30c3\u30c8\u3092\u901a\u3058\u3066\uff09\u307e\u305f\u306f <strong>\u30d5\u30a1\u30a4\u30eb<\/strong> \uff08\u62e1\u5f35\u5c5e\u6027\u3068\u3057\u3066 <code>security.capability<\/code> \uff08ELF\u30d0\u30a4\u30ca\u30ea\uff09\u3002\u305d\u306e\u969b\u3001 <code>execve()<\/code>-Start \u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u30ab\u30fc\u30cd\u30eb\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u3068\u30d7\u30ed\u30bb\u30b9\u306e\u30bb\u30c3\u30c8\u3092\u7d71\u5408\u3057\u307e\u3059\u3002\u7c21\u5358\u306b\u8a00\u3048\u3070\u3001\u30d5\u30a1\u30a4\u30eb\u5c5e\u6027\u304b\u3089\u5f97\u3089\u308c\u308b\u8a31\u53ef\u3055\u308c\u305f\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u3068\u3001\u547c\u3073\u51fa\u3057\u5143\u30d7\u30ed\u30bb\u30b9\u306e\u7d99\u627f\u53ef\u80fd\u306a\u6a29\u9650\u304c\u7d44\u307f\u5408\u308f\u3055\u308c\u3066\u65b0\u3057\u3044 Permitted-Set \u304c\u5f62\u6210\u3055\u308c\u3001\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u540c\u6642\u306b Effective-Set \u3067\u3082\u6709\u52b9\u5316\u3055\u308c\u307e\u3059\u3002 \u3053\u308c\u306b\u3088\u308a\u3001Set-UID\u306b\u3088\u308b\u8fc2\u56de\u304c\u56de\u907f\u3055\u308c\u3001\u6a29\u9650\u306e\u53ef\u8996\u6027\u3068\u691c\u8a3c\u53ef\u80fd\u6027\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux_rechte_besprechung_3820.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30d7\u30ed\u30bb\u30b9\u3068\u3044\u3046\u6587\u8108\u306b\u304a\u3051\u308b\u30b1\u30a4\u30d1\u30d3\u30ea\u30c6\u30a3\u30fb\u30bb\u30c3\u30c8\u306e\u7406\u89e3<\/h2>\n\n<p>\u3069\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3082\u8907\u6570\u306e\u6a29\u9650\u30bb\u30c3\u30c8\u304c\u3042\u308a\u3001\u79c1\u306f\u305d\u308c\u3089\u3092\u610f\u56f3\u7684\u306b <strong>\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/strong>. \u30d1\u30fc\u30df\u30c3\u30c6\u30c3\u30c9\u30fb\u30bb\u30c3\u30c8\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u539f\u5247\u3068\u3057\u3066\u4fdd\u6709\u3067\u304d\u308b\u6a29\u9650\u3092\u5b9a\u7fa9\u3059\u308b\u3002\u30a8\u30d5\u30a7\u30af\u30c6\u30a3\u30d6\u30fb\u30bb\u30c3\u30c8\u306f\u3001\u73fe\u5728\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u6a29\u9650\u3092\u898f\u5b9a\u3059\u308b\u3002\u30a4\u30f3\u30d8\u30ea\u30bf\u30d6\u30eb\u30fb\u30bb\u30c3\u30c8\u306f\u3001\u5b50\u30d7\u30ed\u30bb\u30b9\u306b\u7d99\u627f\u53ef\u80fd\u306a\u6a29\u9650\u3092\u898f\u5b9a\u3059\u308b\u3002\u30d0\u30a6\u30f3\u30c7\u30a3\u30f3\u30b0\u30fb\u30bb\u30c3\u30c8\u306f\u53b3\u683c\u306a\u4e0a\u9650\u3092\u8a2d\u5b9a\u3057\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u305d\u308c\u3092\u8d85\u3048\u3066\u62e1\u5927\u3059\u308b\u3053\u3068\u3092\u9632\u3050\u3002.<\/p>\n\n<h2>\u30a2\u30f3\u30d3\u30a8\u30f3\u30c8\u30fb\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u3068\u30bb\u30ad\u30e5\u30a2\u30d3\u30c3\u30c8<\/h2>\n\n<p>\u304a\u306a\u3058\u307f\u306e\u30bb\u30c3\u30c8\u306e\u307b\u304b\u306b\u3001\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002 <strong>\u30a2\u30f3\u30d3\u30a8\u30f3\u30c8\u30fb\u30bb\u30c3\u30c8<\/strong>, \u3001\u305d\u306e <code>execve()<\/code> \u81ea\u52d5\u7684\u306b\u5931\u52b9\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u79c1\u306f\u3001\u7279\u6a29\u306e\u306a\u3044\u30d7\u30ed\u30bb\u30b9\u304c\u3001\u8907\u6570\u306e <code>\u30a8\u30b0\u30bc\u30c3\u30af<\/code>-\uff08\u5916\u90e8\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306e\u547c\u3073\u51fa\u3057\u6642\u306a\u3069\uff09\u968e\u5c64\u3092\u307e\u305f\u3044\u3067\u4fdd\u6301\u3055\u308c\u308b\u3088\u3046\u306b\u3059\u308b\u3002\u547c\u3073\u51fa\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u81ea\u4f53\u304c\u30d5\u30a1\u30a4\u30eb\u30fb\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306e\u307f\u3001\u30a2\u30f3\u30d3\u30a8\u30f3\u30c8\u6a29\u9650\u304c\u5b9f\u52b9\u6a29\u9650\u306b\u53cd\u6620\u3055\u308c\u308b\u2015\u2015\u3053\u308c\u306b\u3088\u308a\u3001\u610f\u56f3\u3057\u306a\u3044\u6a29\u9650\u306e\u6607\u683c\u3092\u9632\u3050\u3002.<\/p>\n\n<p>\u4ee5\u4e0b\u306e <strong>Securebits<\/strong> \u9077\u79fb\u306e\u8a73\u7d30\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001UID\u306e\u5909\u66f4\u5f8c\u3001\u30d7\u30ed\u30bb\u30b9\u304c\u4ee5\u524d\u306b\u8a2d\u5b9a\u3055\u308c\u305f\u80fd\u529b\u3092\u7dad\u6301\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u306a\u3069\uff08<code>keepcaps<\/code>) \u3042\u308b\u3044\u306f\u3001\u305d\u3082\u305d\u3082\u65b0\u305f\u306a\u7279\u6a29\u3092\u53d6\u5f97\u3057\u3066\u306f\u306a\u3089\u306a\u3044\u306e\u304b\uff08<code>no_new_privs<\/code>). \u5b9f\u969b\u306e\u904b\u7528\u3067\u306f\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306e\u9023\u9396\u3092\u65ad\u3061\u5207\u308b\u305f\u3081\u306b\u3001Securebits\u306e\u8a2d\u5b9a\u3092\u53b3\u683c\u306b\u3057\u3001\u5229\u4fbf\u6027\u3092\u72a0\u7272\u306b\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>Set-UID\u306e\u4ee3\u308f\u308a\u306b\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd<\/h2>\n\n<p>Set-UID\u30d0\u30a4\u30ca\u30ea\u3092\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u3067\u3001\u30ea\u30b9\u30af\u3092 <strong>\u4e0b\u3052\u308b<\/strong>. \u30d7\u30ed\u30b0\u30e9\u30e0\u306broot\u6a29\u9650\u3092\u4e0e\u3048\u308b\u4ee3\u308f\u308a\u306b\u3001\u5fc5\u8981\u306a\u6a29\u9650\u306e\u307f\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u5178\u578b\u7684\u306a\u5909\u66f4\u4f8b\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a <code>setcap 'cap_net_bind_service=+ep' \/usr\/bin\/meinserver<\/code>.\u3068\u4e00\u7dd2\u306b <code>getcap -r \/<\/code> \u3069\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30b9\u30ad\u30eb\u304c\u7d10\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a8\u30b9\u30ab\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u7d4c\u8def\u304c\u8457\u3057\u304f\u77ed\u7e2e\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n<p>\u91cd\u8981\u306a\u306e\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\u306f <strong>ELF\u30d0\u30a4\u30ca\u30ea<\/strong> \u4f5c\u7528\u3057\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u30b9\u30af\u30ea\u30d7\u30c8\uff08Python\u3084Bash\u306a\u3069\uff09\u306f\u3001\u3053\u308c\u3092\u78ba\u5b9f\u306b\u7d99\u627f\u3059\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u79c1\u306f\u7279\u6a29\u64cd\u4f5c\u3092\u3001\u9759\u7684\u691c\u8a3c\u6e08\u307f\u306e\u5c0f\u3055\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3059\u308b\u304b\u3001\u30bd\u30b1\u30c3\u30c8\u30a2\u30af\u30c6\u30a3\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b5\u30fc\u30d3\u30b9\u81ea\u4f53\u304c\u30d0\u30a4\u30f3\u30c9\u3059\u308b\u5fc5\u8981\u3092\u6700\u521d\u304b\u3089\u306a\u304f\u3057\u3066\u3044\u307e\u3059\u3002 \u307e\u305f\u3001\u30d5\u30a1\u30a4\u30eb\u6a29\u9650\u306b\u3082\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u307e\u3059\u3002\u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u306f\u30ab\u30fc\u30cd\u30eb\u306b\u5bfe\u3057\u3066\u7279\u5225\u306a\u6a29\u9650\u3092\u4ed8\u4e0e\u3057\u307e\u3059\u304c\u3001 <strong>\u306a\u3057<\/strong> \u4e00\u822c\u7684\u306aACL\u3084POSIX\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u3002.<\/p>\n\n<p>\u30b3\u30d4\u30fc\u3084\u5727\u7e2e\u3092\u884c\u3046\u3068\u3001\u6a5f\u80fd\u306f\u3059\u3050\u306b\u5931\u308f\u308c\u3066\u3057\u307e\u3044\u307e\u3059\uff1a <code>cp<\/code> XATTR \u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3001\u8a2d\u5b9a\u304c\u9593\u9055\u3063\u3066\u3044\u308b <code>umask<\/code> \u307e\u305f\u306f\u3001\u62e1\u5f35\u5c5e\u6027\u306e\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u30d3\u30eb\u30c9\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u3092\u524a\u9664\u3059\u308b <code>security.capability<\/code> \u6697\u9ed9\u306e\u3046\u3061\u306b\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u518d\u73fe\u6027\u306e\u3042\u308b\u65b9\u6cd5\u3067\u4f5c\u696d\u3092\u884c\u3044\u3001\u4ee5\u4e0b\u3092\u6d3b\u7528\u3057\u3066\u3044\u307e\u3059\uff1a <code>cp --preserve=xattr ...<\/code>, <code>tar --xattrs<\/code>, <code>rsync -X<\/code>. \u30d1\u30c3\u30b1\u30fc\u30b8\u30d3\u30eb\u30c9\u3067\u306f\u3001\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u5185\u3067\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\uff08File-Capabilities\uff09\u3092\u660e\u793a\u7684\u306b\u8a2d\u5b9a\u3057\u3001\u30af\u30ea\u30fc\u30f3\u306aVM\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u30c6\u30b9\u30c8\u3057\u3066\u3001\u78ba\u8a8d\u3057\u307e\u3059\u3002 <code>getcap<\/code> CI\u5185\u3002.<\/p>\n\n<h2>\u73fe\u5b9f\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u7528\u3044\u305f\u7279\u6a29\u5206\u96e2<\/h2>\n\n<p>Web\u30b5\u30fc\u30d0\u30fc\u306b\u306f\u30dd\u30fc\u30c880\/443\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u5fc5\u8981\u3067\u3059\u304c\u3001\u30ab\u30fc\u30cd\u30eb\u30e2\u30b8\u30e5\u30fc\u30eb\u3084\u30b7\u30b9\u30c6\u30e0\u306e\u518d\u8d77\u52d5\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f\u5fc5\u8981\u306a\u3044\u305f\u3081\u3001\u6b21\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002 <strong>CAP_NET_BIND_SERVICE<\/strong> \u305d\u308c\u4ee5\u5916\u306f\u4f55\u3082\u3042\u308a\u307e\u305b\u3093\u3002\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u53d6\u308a\u3068\u66f8\u304d\u8fbc\u307f\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002 \u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u30c4\u30fc\u30eb\u306f\u6307\u6a19\u306b\u5bfe\u3059\u308b\u8aad\u307f\u53d6\u308a\u30a2\u30af\u30bb\u30b9\u6a29\u9650\u3092\u6301\u3064\u304c\u3001\u5909\u66f4\u6a29\u9650\u306f\u4e0e\u3048\u3089\u308c\u306a\u3044\u3002\u3053\u306e\u3088\u3046\u306a\u6a29\u9650\u306e\u5272\u308a\u5f53\u3066\u306b\u3088\u308a\u3001\u653b\u6483\u306e\u5f71\u97ff\u306f\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u306b\u53ca\u3076\u3053\u3068\u306a\u304f\u3001\u30ed\u30fc\u30ab\u30eb\u306b\u9650\u5b9a\u3055\u308c\u308b\u3002\u307e\u3055\u306b\u3053\u306e\u5206\u96e2\u306b\u3088\u3063\u3066\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u7ba1\u7406\u304c\u5bb9\u6613\u306b\u306a\u308a\u3001\u8a2d\u5b9a\u30df\u30b9\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/balancing-linux-capabilities-5618.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>sudo\u3068\u30ed\u30fc\u30eb\u306e\u7d44\u307f\u5408\u308f\u305b<\/h2>\n\n<p>\u6a5f\u80fd\u306f\u3001\u304d\u3061\u3093\u3068\u3057\u305f <strong>\u5f79\u5272\u69cb\u9020<\/strong>, \u3001\u305d\u308c\u3089\u306f\u305d\u308c\u3089\u3092\u88dc\u5b8c\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u79c1\u306fsudo\u6a29\u9650\u3092\u53b3\u683c\u306b\u4ed8\u4e0e\u3057\u3001\u5b8c\u5168\u306a\u30b3\u30de\u30f3\u30c9\u30d1\u30b9\u3092\u6307\u5b9a\u3057\u3001\u300cALL=(ALL) ALL\u300d\u306e\u3088\u3046\u306a\u4e00\u5f8b\u7684\u306a\u30eb\u30fc\u30eb\u306f\u907f\u3051\u3066\u3044\u307e\u3059\u3002 \u6a29\u9650\u306e\u4ed8\u4e0e\u306f\u3059\u3079\u3066\u30ed\u30b0\u306b\u8a18\u9332\u3057\u3066\u3044\u307e\u3059\u3002\u30b0\u30eb\u30fc\u30d7\u306f\u8cac\u4efb\u7bc4\u56f2\u3092\u307e\u3068\u3081\u3001\u30ab\u30d1\u30d3\u30ea\u30c6\u30a3\u306f\u30d7\u30ed\u30bb\u30b9\u306b\u304a\u3051\u308b\u6280\u8853\u7684\u306a\u5236\u9650\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u904e\u5270\u306a\u6a29\u9650\u3092\u4e0e\u3048\u308b\u3053\u3068\u306a\u304f\u3001\u660e\u78ba\u306a\u8cac\u4efb\u7bc4\u56f2\u304c\u78ba\u7acb\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n<h2>\u3088\u304f\u3042\u308b\u843d\u3068\u3057\u7a74\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n<ul>\n  <li><strong>CAP_SYS_ADMIN \u3092\u7565\u79f0\u3068\u3057\u3066\u4f7f\u7528\u3057\u306a\u3044\uff1a<\/strong> \u3053\u306e\u6a29\u5229\u306f\u5305\u62ec\u7684\u306a\u3082\u306e\u3067\u3059\u3002\u79c1\u306f\u3053\u308c\u3092\u3001\u3088\u308a\u9650\u5b9a\u7684\u306a\u9078\u629e\u80a2\uff08\u4f8b\uff1a. <code>CAP_SYS_CHROOT<\/code>, <code>CAP_SYS_TIME<\/code>, <code>CAP_SYS_NICE<\/code>) \u3042\u308b\u3044\u306f\u3001\u305d\u3082\u305d\u3082\u3084\u3081\u3066\u304a\u304f\u3002.<\/li>\n  <li><strong>\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u306f\u53b3\u683c\u306b\u7dad\u6301\u3055\u308c\u307e\u3059\uff1a<\/strong> \u6a5f\u80fd\u306f\u3001DAC\u3092\u4e00\u822c\u7684\u306b\u7121\u52b9\u306b\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\uff5e\u306a\u3057\u3067\u306f <code>CAP_DAC_OVERRIDE<\/code> \u30ab\u30fc\u30cd\u30eb\u306f\u5f15\u304d\u7d9a\u304d\u6240\u6709\u8005\u3068\u30e2\u30fc\u30c9\u30d3\u30c3\u30c8\u3092\u5c0a\u91cd\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u79c1\u306f\u8aad\u307f\u53d6\u308a\u6a29\u9650\u306e\u4ed8\u4e0e\u3092\u6700\u5c0f\u9650\u306b\u7559\u3081\u3066\u3044\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30d1\u30b9\u786c\u5316\uff1a<\/strong> \u30d0\u30a4\u30ca\u30ea\u306b\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\uff08File-Capabilities\uff09\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u3001PATH\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\uff08\u7d76\u5bfe\u30d1\u30b9\u3092 <code>sudoers<\/code>, \u691c\u7d22\u30d1\u30b9\u5185\u306e\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u306e\u66f8\u304d\u8fbc\u307f\u6a29\u9650\u304c\u5236\u9650\u3055\u308c\u3066\u3044\u308b\uff09\u3002.<\/li>\n  <li><strong>\u65e9\u3081\u306b\u3001\u983b\u7e41\u306b\u6295\u7a3f\u3057\u3088\u3046\uff1a<\/strong> \u30d7\u30ed\u30bb\u30b9\u306f\u3001\u5fc5\u8981\u4ee5\u4e0a\u306b\u9ad8\u3044\u6a29\u9650\u3067\u8d77\u52d5\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u79c1\u306f\u3001\u91cd\u8981\u306a\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u305f\u76f4\u5f8c\u306b\u3001\u4e0d\u8981\u306a\u6a29\u9650\u3092\u76f4\u3061\u306b\u524a\u9664\u3057\u307e\u3059\uff08<code>prctl()<\/code>\/libcap\uff09\u3092\u8a2d\u5b9a\u3057\u3001 <code>no_new_privs<\/code>, \u3001\u53ef\u80fd\u306a\u5834\u5408\u306f\u3002.<\/li>\n  <li><strong>\u907a\u4f1d\u3092\u5236\u9650\u3059\u308b\uff1a<\/strong> \u79c1\u306f\u300cInheritable\u300d\u30bb\u30c3\u30c8\u3068\u300cAmbient\u300d\u30bb\u30c3\u30c8\u3092\u5c0f\u3055\u304f\u6291\u3048\u3066\u3044\u307e\u3059\u3002\u5b50\u30d7\u30ed\u30bb\u30b9\u306f\u65b0\u3057\u3044\u30c9\u30a2\u3092\u958b\u3044\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/li>\n  <li><strong>\u30d3\u30eb\u30c9\u304a\u3088\u3073\u30c7\u30d7\u30ed\u30a4\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u306e\u78ba\u8a8d\uff1a<\/strong> \u79c1\u306f\u3001\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002 <code>security.capability<\/code> \u304c\u4fdd\u6301\u3055\u308c\u3001\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u624b\u9806\uff08\u30b3\u30f3\u30c6\u30ca\u30ec\u30a4\u30e4\u30fc\u3001NFS\u3001\u30a2\u30fc\u30c6\u30a3\u30d5\u30a1\u30af\u30c8\u30b9\u30ad\u30e3\u30ca\u30fc\uff09\u306b\u3088\u3063\u3066XATTR\u304c\u524a\u9664\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n<h2>\u4e3b\u8981\u306a\u6a5f\u80fd\u3068\u30ea\u30b9\u30af\u306e\u6982\u8981<\/h2>\n\n<p>\u6a29\u9650\u3092\u4ed8\u4e0e\u3059\u308b\u524d\u306b\u3001\u5fc5\u8981\u306a\u6a29\u9650\u3092\u660e\u78ba\u306b\u5272\u308a\u5f53\u3066\u3001\u305d\u306e\u30ea\u30b9\u30af\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u8868\u306f\u3001\u5178\u578b\u7684\u306a\u4f8b\u3068\u305d\u306e\u5f71\u97ff\u304a\u3088\u3073\u5206\u985e\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u904e\u5ea6\u306a\u6a29\u9650\u306e\u4ed8\u4e0e\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u5e38\u306b\u4ee3\u66ff\u6848\u3092\u691c\u8a0e\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b <strong>CAP_SYS_ADMIN<\/strong> \u79c1\u306f\u6975\u3081\u3066\u614e\u91cd\u306b\u5272\u308a\u5f53\u3066\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u53ef\u80fd\u306a\u9650\u308a\u3001\u5e83\u7bc4\u306a\u7279\u6a29\u3092\u3001\u7684\u3092\u7d5e\u3063\u305f\u9650\u5b9a\u7684\u306a\u3082\u306e\u306b\u7f6e\u304d\u63db\u3048\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u80fd\u529b<\/th>\n      <th>\u76ee\u7684<\/th>\n      <th>\u30ea\u30b9\u30af<\/th>\n      <th>\u4f8b<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>CAP_NET_BIND_SERVICE<\/td>\n      <td>1024\u672a\u6e80\u306e\u30dd\u30fc\u30c8\u306b\u30d0\u30a4\u30f3\u30c9\u3059\u308b<\/td>\n      <td>\u4f4e\uff5e\u4e2d<\/td>\n      <td>Web\u30b5\u30fc\u30d0\u30fc\u309280\/443\u306b\u8a2d\u5b9a<\/td>\n    <\/tr>\n    <tr>\n      <td>CAP_SYS_BOOT<\/td>\n      <td>\u30b7\u30b9\u30c6\u30e0\u3092\u518d\u8d77\u52d5\u3059\u308b<\/td>\n      <td>\u9ad8\u3044<\/td>\n      <td>\u4e88\u5b9a\u3055\u308c\u3066\u3044\u308b\u518d\u8d77\u52d5<\/td>\n    <\/tr>\n    <tr>\n      <td>CAP_SYS_MODULE<\/td>\n      <td>\u30ab\u30fc\u30cd\u30eb\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u8aad\u307f\u8fbc\u307f\uff0f\u30a2\u30f3\u30ed\u30fc\u30c9<\/td>\n      <td>\u975e\u5e38\u306b\u9ad8\u3044<\/td>\n      <td>\u30c9\u30e9\u30a4\u30d0\u30fc\u7ba1\u7406<\/td>\n    <\/tr>\n    <tr>\n      <td>CAP_SYS_ADMIN<\/td>\n      <td>\u591a\u5f69\u306a\u7ba1\u7406\u64cd\u4f5c<\/td>\n      <td>\u975e\u5e38\u306b\u9ad8\u3044<\/td>\n      <td>\u5404\u7a2e\u4fdd\u5b88\u4f5c\u696d<\/td>\n    <\/tr>\n    <tr>\n      <td>CAP_SETUID \/ CAP_SETGID<\/td>\n      <td>UID\/GID\u306e\u5909\u66f4<\/td>\n      <td>\u4e2d\uff5e\u9ad8<\/td>\n      <td>\u52e4\u52d9\u4e2d\u306e\u6a29\u5229\u306e\u79fb\u8ee2<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux_capabilities_tech-office_4738.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<p>\u8868\u306e\u5185\u5bb9\u4ee5\u5916\u306b\u3082\u3001\u73fe\u5728\u8a55\u4fa1\u3092\u884c\u3063\u3066\u3044\u308b\u3068\u3053\u308d\u3060 <code>CAP_SYS_PTRACE<\/code> \uff08\u30d7\u30ed\u30bb\u30b9\u306e\u30c7\u30d0\u30c3\u30b0\uff09\u3001, <code>CAP_NET_ADMIN<\/code> \uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u8a2d\u5b9a\uff09\u304a\u3088\u3073 <code>CAP_DAC_OVERRIDE<\/code> \uff08\u30d5\u30a1\u30a4\u30eb\u30a2\u30af\u30bb\u30b9\u5236\u9650\u306e\u56de\u907f\uff09\u306b\u3064\u3044\u3066\u306f\u6975\u3081\u3066\u614e\u91cd\u3067\u3042\u308b\u3079\u304d\u3060\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u3053\u3046\u3057\u305f\u6a29\u9650\u3092\u56de\u907f\u3059\u308b\u624b\u6cd5\u304c\u5b58\u5728\u3059\u308b\u3002\u4f8b\u3048\u3070\u3001\u30d7\u30ed\u30bb\u30b9\u30fb\u30b9\u30cc\u30fc\u30d4\u30f3\u30b0\u306e\u4ee3\u308f\u308a\u306b\u5c02\u7528\u306e\u30e1\u30c8\u30ea\u30af\u30b9\u30fb\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001\u30d0\u30a4\u30f3\u30c9\u6a29\u9650\u306e\u4ee3\u308f\u308a\u306b\u30bd\u30b1\u30c3\u30c8\u30fb\u30a2\u30af\u30c6\u30a3\u30d9\u30fc\u30b7\u30e7\u30f3\u3084\u30dd\u30fc\u30c8\u8ee2\u9001\u3092\u5229\u7528\u3057\u305f\u308a\u3001\u4e00\u5f8b\u7684\u306aDAC\u56de\u907f\u306e\u4ee3\u308f\u308a\u306b\u9069\u5207\u306a\u30d5\u30a1\u30a4\u30eb\u6a29\u9650\u3092\u8a2d\u5b9a\u3057\u305f\u308a\u3068\u3044\u3063\u305f\u65b9\u6cd5\u3067\u3042\u308b\u3002.<\/p>\n\n<h2>\u30b3\u30f3\u30c6\u30ca\u304a\u3088\u3073\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u306b\u304a\u3051\u308b\u30cf\u30fc\u30c9\u30cb\u30f3\u30b0<\/h2>\n\n<p>\u30de\u30eb\u30c1\u30c6\u30ca\u30f3\u30c8\u74b0\u5883\u306b\u304a\u3044\u3066\u306f\u3001\u79c1\u306f\u80fd\u529b\u3092\u6839\u672c\u7684\u306b\u898b\u76f4\u3059\u3079\u304d\u3060\u3068\u8003\u3048\u3066\u3044\u307e\u3059 <strong>\u5c0f\u3055\u3044<\/strong> \u305d\u3057\u3066\u3001\u5b50\u30d7\u30ed\u30bb\u30b9\u3078\u306e\u7d99\u627f\u3092\u9632\u3050\u3002\u30d0\u30a6\u30f3\u30c7\u30a3\u30f3\u30b0\u30bb\u30c3\u30c8\u304c\u53b3\u5bc6\u306b\u8a2d\u5b9a\u3055\u308c\u308b\u3068\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306f\u5927\u5e45\u306b\u5411\u4e0a\u3059\u308b\u3002\u79c1\u306f\u3053\u308c\u3092\u3001\u5206\u96e2\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u7a7a\u9593\u304a\u3088\u3073\u30d7\u30ed\u30bb\u30b9\u7a7a\u9593\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u5229\u7528\u3057\u3066\u3044\u308b\u3002\u5206\u96e2\u306e\u624b\u6cd5\u306b\u3064\u3044\u3066\u6982\u89b3\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u5165\u9580\u8a18\u4e8b\u304c\u53c2\u8003\u306b\u306a\u308b\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%83%97%e3%83%ad%e3%82%bb%e3%82%b9%e5%88%86%e9%9b%a2%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-chroot-cagefs-%e3%82%b3%e3%83%b3%e3%83%86%e3%83%8a-%e3%82%b8%e3%82%a7%e3%82%a4%e3%83%ab\/\">\u30d7\u30ed\u30bb\u30b9\u5206\u96e2<\/a>. \u3053\u308c\u306b\u3088\u308a\u3001\u305f\u3068\u3048\u3042\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u4e0d\u5177\u5408\u304c\u751f\u3058\u3066\u3082\u3001\u5404\u30b5\u30fc\u30d3\u30b9\u306f\u72ec\u7acb\u3057\u3066\u52d5\u4f5c\u3057\u7d9a\u3051\u307e\u3059\u3002.<\/p>\n\n<p>\u5b9f\u969b\u306b\u306f\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u8a2d\u5b9a\u3092\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u300c\u3059\u3079\u3066\u30c9\u30ed\u30c3\u30d7\u3001\u6307\u5b9a\u3057\u3066\u8ffd\u52a0\u300d\u306b\u3057\u3066\u3044\u307e\u3059\uff1a <code>--cap-drop=ALL --cap-add=NET_BIND_SERVICE<\/code> Web\u30b5\u30fc\u30d3\u30b9\u7528\u3001\u30de\u30a6\u30f3\u30c8\u6a29\u9650\u306a\u3057\u3001\u306a\u3057 <code>SYS_ADMIN<\/code>. \u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u74b0\u5883\u3067\u306f\u3001\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u4e2d\u592e\u3067\u7ba1\u7406\u3057\u3001\u30dd\u30ea\u30b7\u30fc\u3067\u691c\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002\u91cd\u8981\u306a\u70b9\u3068\u3057\u3066\u3001\u30a4\u30e1\u30fc\u30b8\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\u306b\u306f\u4f9d\u5b58\u305b\u305a\u3001\u30aa\u30fc\u30b1\u30b9\u30c8\u30ec\u30fc\u30bf\u30fc\u3067\u5b9f\u884c\u6642\u306e\u6a29\u9650\u3092\u4ed8\u4e0e\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u518d\u73fe\u6027\u3068\u76e3\u67fb\u53ef\u80fd\u6027\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n<h2>SELinux \u304a\u3088\u3073 AppArmor \u3068\u306e\u9023\u643a<\/h2>\n\n<p>\u300cCapabilities\u300d\u306f\u30d7\u30ed\u30bb\u30b9\u304c\u5b9f\u884c\u3067\u304d\u308b\u64cd\u4f5c\u3092\u5236\u5fa1\u3057\u3001\u300cMAC\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u300d\u306f\u30d7\u30ed\u30bb\u30b9\u304c\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5bfe\u8c61\u3092\u5b9a\u7fa9\u3059\u308b\u3082\u306e\u3067\u3001\u3053\u306e2\u3064\u306f\u4e92\u3044\u306b\u8abf\u548c\u3057\u3066\u3044\u308b <strong>\u826f\u3044<\/strong>. \u79c1\u306fCapabilities\u3092\u53b3\u683c\u306b\u8a2d\u5b9a\u3057\u3001SELinux\u3084AppArmor\u306b\u30d5\u30a1\u30a4\u30eb\u3084\u30bd\u30b1\u30c3\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3055\u305b\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u5bfe\u3057\u3066\u8907\u6570\u306e\u969c\u58c1\u3092\u8a2d\u3051\u308b\u591a\u5c64\u9632\u5fa1\u304c\u5b9f\u73fe\u3055\u308c\u307e\u3059\u3002\u7c21\u5358\u306a\u6bd4\u8f03\u306f\u3053\u3061\u3089\u306b\u3042\u308a\u307e\u3059\uff1a <a href=\"https:\/\/webhosting.de\/ja\/selinux-%e5%af%be-apparmor%e3%80%81linux-%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3%e3%80%81%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc%e3%81%ae%e5%bc%b7%e5%8c%96%e3%80%81%e4%bf%9d%e8%ad%b7\/\">SELinux \u5bfe AppArmor<\/a>. \u3053\u308c\u306b\u3088\u308a\u3001\u4fb5\u5bb3\u3055\u308c\u305f\u30b5\u30fc\u30d3\u30b9\u306f\u5c01\u3058\u8fbc\u3081\u3089\u308c\u3001\u88ab\u5bb3\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/entwickler_schreibtisch2345.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u5b9f\u8df5\uff1a\u6bb5\u968e\u3092\u8ffd\u3063\u3066\u9032\u3081\u308b<\/h2>\n\n<p>\u307e\u305a\u306f\u3001\u3059\u3079\u3066\u306e\u30b5\u30fc\u30d3\u30b9\u3068\u305d\u306e <strong>\u5fc5\u8981\u6761\u4ef6<\/strong>. \u305d\u306e\u5f8c\u3001\u4e0d\u8981\u306aSet-UID\u30d0\u30a4\u30ca\u30ea\u3092\u524a\u9664\u3059\u308b\u304b\u3001\u9069\u5207\u306a\u30d5\u30a1\u30a4\u30eb\u6a29\u9650\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002sudo\u306e\u8a2d\u5b9a\u306f\u53b3\u683c\u306b\u884c\u3044\u3001\u5404\u30a8\u30f3\u30c8\u30ea\u3092\u6587\u66f8\u5316\u3057\u307e\u3059\u3002\u5f79\u5272\u3068\u30b0\u30eb\u30fc\u30d7\u306b\u30bf\u30b9\u30af\u3092\u5272\u308a\u5f53\u3066\u3001\u6a29\u9650\u306f\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002 \u305d\u306e\u5f8c\u3001\u8ca0\u8377\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3001\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u306b\u4e88\u671f\u305b\u306c\u62d2\u5426\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u307e\u3059\u3002.<\/p>\n\n<p>\u7c21\u6f54\u306a\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u304c\u3001\u79fb\u884c\u4f5c\u696d\u306e\u52a9\u3051\u306b\u306a\u3063\u3066\u3044\u307e\u3059\uff1a<\/p>\n<ul>\n  <li>\u5404\u696d\u52d9\u3054\u3068\u306e\u8981\u4ef6\u3092\u6587\u66f8\u3067\u660e\u78ba\u306b\u5b9a\u3081\u308b\uff08\u672c\u5f53\u306b\u5fc5\u8981\u306a\u3082\u306e\u306b\u9650\u308b\uff09\u3002.<\/li>\n  <li>\u65e2\u5b58\u306e\u7279\u6a29\u3092\u6574\u7406\u3059\u308b (<code>find \/ -perm -4000<\/code>, <code>getcap -r \/<\/code>).<\/li>\n  <li>\u7684\u3092\u7d5e\u3063\u3066\u7f6e\u304d\u63db\u3048\u308b\uff1aSet-UID \u3092\u5ec3\u6b62\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u6a29\u9650\u8a2d\u5b9a\uff08File-Capabilities\uff09\u3092\u8a2d\u5b9a\u3057\u3001\u6a29\u9650\u3092\u65e9\u671f\u306b\u524a\u9664\u3059\u308b\u3002.<\/li>\n  <li>\u7d99\u627f\u3092\u9589\u3058\u308b\uff1a\u30d0\u30a6\u30f3\u30c7\u30a3\u30f3\u30b0\u30bb\u30c3\u30c8\u3092\u7d5e\u308a\u8fbc\u307f\u3001Inheritable\/Ambient\u3092\u6700\u5c0f\u5316\u3059\u308b\u3002.<\/li>\n  <li>systemd\uff0f\u30b3\u30f3\u30c6\u30ca\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56 (<code>CapabilityBoundingSet=<\/code>, <code>NoNewPrivileges=yes<\/code>).<\/li>\n  <li>\u8ca0\u8377\u30c6\u30b9\u30c8\u306e\u5b9f\u65bd\u3001\u30ed\u30b0\u304a\u3088\u3073\u76e3\u67fb\u8a18\u9332\u306e\u78ba\u8a8d\u3001\u4f8b\u5916\u306e\u8a18\u9332\u3002.<\/li>\n<\/ul>\n\n<h2>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u3001\u30cd\u30fc\u30e0\u30b9\u30da\u30fc\u30b9\u3001\u304a\u3088\u3073\u7d99\u7d9a\u7684\u306a\u76e3\u67fb<\/h2>\n\n<p>\u30ed\u30b0\u30d5\u30a1\u30a4\u30eb\u3001\u30a2\u30e9\u30fc\u30c8\u3001\u30b7\u30b9\u30c6\u30e0\u30b3\u30fc\u30eb\u3092\u76e3\u8996\u3057\u3001\u671b\u307e\u3057\u304f\u306a\u3044\u52d5\u4f5c\u3092\u5373\u5ea7\u306b <strong>\u76ee\u7acb\u3064<\/strong>. \u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u3001sudo\u30eb\u30fc\u30eb\u3001\u304a\u3088\u3073\u30ed\u30fc\u30eb\u306e\u5909\u66f4\u306b\u3064\u3044\u3066\u306f\u3001\u5b9a\u671f\u7684\u306b\u691c\u8a3c\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u30ab\u30fc\u30cd\u30eb\u306e\u5206\u96e2\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u7528\u3044\u3066\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u3092\u3055\u3089\u306b\u5206\u96e2\u3057\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u6982\u8981\u306f\u3001\u305d\u306e\u305f\u3081\u306e\u826f\u3044\u51fa\u767a\u70b9\u3068\u306a\u308a\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/%e3%82%b5%e3%83%bc%e3%83%90%e3%83%bc-%e3%82%b3%e3%83%b3%e3%83%86%e3%82%ad%e3%82%b9%e3%83%88-%e5%88%86%e9%9b%a2-%e5%90%8d%e5%89%8d%e7%a9%ba%e9%96%93-c%e3%82%b0%e3%83%ab%e3%83%bc%e3%83%97-%e3%83%9b\/\">\u30cd\u30fc\u30e0\u30b9\u30da\u30fc\u30b9\u3068Cgroups<\/a>. \u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u7570\u5e38\u3092\u65e9\u671f\u306b\u767a\u898b\u3057\u3001\u5468\u56f2\u3092\u6e05\u6f54\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n<p>\u65e5\u5e38\u7684\u306b\u306f\u3001\u7c21\u5358\u306a\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3063\u3066\u3044\u307e\u3059\uff1a <code>capsh --print<\/code> \u73fe\u5728\u306e\u30b9\u30ad\u30eb\u30bb\u30c3\u30c8\u3092\u8868\u793a\u3057\u3001, <code>getpcaps<\/code> \u30d7\u30ed\u30bb\u30b9\u6a29\u9650\u3092\u4e00\u89a7\u8868\u793a\u3057\u3001 <code>\/proc\/\/status<\/code> \u79c1\u306f\u8aad\u3093\u3067\u3044\u308b <code>CapEff<\/code>, <code>CapPrm<\/code>, <code>CapBnd<\/code>.\u3068\u4e00\u7dd2\u306b <code>\u76e3\u67fb\u5f79<\/code> \u30ad\u30e3\u30d1\u30d3\u30ea\u30c6\u30a3\u30b9\u30c6\u30fc\u30bf\u30b9\u306e\u5909\u66f4\uff08\u4f8b\uff1a\u30eb\u30fc\u30eb\u304c <code>capset<\/code>)\u3001\u30a4\u30d9\u30f3\u30c8\u3068\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u3092\u95a2\u9023\u4ed8\u3051\u3001\u7a81\u7136\u5f37\u529b\u306a\u6a29\u9650\u304c\u51fa\u73fe\u3057\u305f\u969b\u306b\u30a2\u30e9\u30fc\u30e0\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u5384\u4ecb\u306a\u30b1\u30fc\u30b9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u30c4\u30fc\u30eb\u304c\u5f79\u7acb\u3061\u307e\u3059 <code>strace -e capget,capset<\/code>, \u3001\u6a29\u9650\u306e\u6539\u3056\u3093\u3092\u53ef\u8996\u5316\u3059\u308b\u305f\u3081\u306b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/08\/linux-capabilities-8123.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>systemd\u304a\u3088\u3073\u30b3\u30f3\u30c6\u30ca\u306e\u5b9f\u8df5\u4f8b<\/h2>\n\n<p>\u591a\u304f\u306e\u30b5\u30fc\u30d3\u30b9\u3092systemd\u30e6\u30cb\u30c3\u30c8\u3068\u3057\u3066\u904b\u7528\u3057\u3001\u305d\u3053\u3067\u6a29\u9650\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n<ul>\n  <li><code>CapabilityBoundingSet=CAP_NET_BIND_SERVICE<\/code> \u5229\u7528\u53ef\u80fd\u306a\u6a29\u5229\u306e\u7bc4\u56f2\u3092\u5fc5\u8981\u6700\u5c0f\u9650\u306b\u7d5e\u308a\u8fbc\u307f\u307e\u3059\u3002.<\/li>\n  <li><code>AmbientCapabilities=CAP_NET_BIND_SERVICE<\/code> \u3053\u306e\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u30b5\u30fc\u30d3\u30b9\u306f\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\u306a\u3057\u306780\/443\u30dd\u30fc\u30c8\u306b\u30d0\u30a4\u30f3\u30c9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n  <li><code>NoNewPrivileges=yes<\/code> \u305d\u306e\u5f8c\u306e\u6a29\u5229\u306e\u62e1\u5927\u3092\u59a8\u3052\u308b\u3002.<\/li>\n  <li><code>\u30e6\u30fc\u30b6\u30fc=<\/code>, <code>Group=<\/code>, <code>\u30d7\u30ed\u30c6\u30af\u30c8\u30b7\u30b9\u30c6\u30e0\uff1d\u30b9\u30c8\u30ea\u30af\u30c8<\/code>, <code>PrivateTmp=yes<\/code> \u65ad\u71b1\u3092\u5b8c\u6210\u3055\u305b\u307e\u3059\u3002.<\/li>\n<\/ul>\n<p>Container\u5185\u3067\u306f\u3001\u30d7\u30ed\u30bb\u30b9\u3092\u53ef\u80fd\u306a\u9650\u308a\u6700\u5c0f\u9650\u306b\u8d77\u52d5\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\uff1a <code>docker run --cap-drop=ALL --cap-add=NET_BIND_SERVICE --read-only<\/code>. \u77ed\u671f\u9593\u3057\u304b\u5b58\u7d9a\u3057\u306a\u3044\u30b8\u30e7\u30d6\u306b\u3064\u3044\u3066\u306f\u3001\u30d3\u30eb\u30c9\u306e\u518d\u73fe\u6027\u3092\u78ba\u4fdd\u3057\u3001\u6a29\u9650\u3092\u74b0\u5883\u306b\u7d10\u3065\u3051\u308b\u305f\u3081\u3001\u30a4\u30e1\u30fc\u30b8\u5185\u306e\u30d5\u30a1\u30a4\u30eb\u6a5f\u80fd\u3067\u306f\u306a\u304f\u5b9f\u884c\u6642\u9593\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<h2>\u5b9f\u52d9\u306b\u304a\u3051\u308b\u5177\u4f53\u7684\u306a\u79fb\u884c\u4e8b\u4f8b<\/h2>\n\n<ul>\n  <li><strong>Set-UID \u306a\u3057\u306e ping\uff1a<\/strong> \u4ee3\u308f\u308a\u306b <code>setuid root<\/code> \u79c1\u306f <code>setcap 'cap_net_raw=+ep' \/bin\/ping<\/code>. \u3053\u308c\u306b\u3088\u308a\u3001\u3069\u306e\u30e6\u30fc\u30b6\u30fc\u3082\u5b8c\u5168\u306aroot\u6a29\u9650\u3092\u6301\u305f\u305a\u306bICMP\u30bd\u30b1\u30c3\u30c8\u3092\u958b\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u79c1\u306f\u5b9a\u671f\u7684\u306b <code>getcap \/bin\/ping<\/code>, \u305d\u306e\u5c5e\u6027\u304c\u4fdd\u6301\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3002.<\/li>\n  <li><strong>\u30dd\u30fc\u30c880\/443\u3067\u306eWeb\u30b5\u30fc\u30d3\u30b9\uff1a<\/strong> \u79c1\u306f\u4e00\u822c\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u30b5\u30fc\u30d3\u30b9\u3092\u7a3c\u50cd\u3055\u305b\u3001\u4ee5\u4e0b\u306e\u60c5\u5831\u306e\u307f\u3092\u63d0\u4f9b\u3057\u307e\u3059 <code>cap_net_bind_service<\/code>. \u3082\u3057\u305d\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u3082\u3068\u3082\u3068\u30ea\u30d0\u30fc\u30b9\u30d7\u30ed\u30ad\u30b7\u306e\u5f8c\u308d\u306b\u3042\u308b\u306e\u3067\u3042\u308c\u3070\u3001\u4ee3\u308f\u308a\u306b\u305d\u3053\u306780\u756a\u307e\u305f\u306f443\u756a\u30dd\u30fc\u30c8\u306b\u30d0\u30a4\u30f3\u30c9\u3057\u3001\u5185\u90e8\u3067\u306f\u30cf\u30a4\u30dd\u30fc\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3068\u3044\u3046\u65b9\u6cd5\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306a\u3089\u3001\u7279\u5225\u306a\u30b9\u30ad\u30eb\u306f\u4e00\u5207\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n  <li><strong>\u8a34\u8a1f\u306b\u304a\u3051\u308b\u5f53\u4e8b\u8005\u306e\u5909\u66f4\uff1a<\/strong> \u4e00\u6642\u7684\u306b\u6a29\u9650\u3092\u4e0a\u3052\u308b\u5fc5\u8981\u304c\u3042\u308b\u30c4\u30fc\u30eb\uff08\u4f8b\uff1aNice\u30ec\u30d9\u30eb\u306e\u8a2d\u5b9a\u306a\u3069\uff09\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059 <code>cap_sys_nice<\/code>, \u3001\u30a2\u30af\u30b7\u30e7\u30f3\u306f\u65e9\u3081\u306b\u6e08\u307e\u305b\u3066\u3001\u305d\u306e\u5f8c\u305d\u306e\u30b9\u30ad\u30eb\u3092\u89e3\u9664\u3059\u308b\u3002\u6c38\u7d9a\u7684\u306b\u6a29\u9650\u304c\u4e0a\u6607\u3057\u305f\u72b6\u614b\u306f\u907f\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002.<\/li>\n<\/ul>\n\n<h2>\u9650\u754c\u3068\u4ee3\u66ff\u6848<\/h2>\n\n<p>\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u3067\u6a5f\u80fd\u304c\u5fc5\u8981\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u591a\u304f\u306e\u5834\u5408\u3001\u30ea\u30b9\u30af\u306e\u4f4e\u3044\u5b89\u5168\u306a\u4ee3\u66ff\u624b\u6bb5\u304c\u5b58\u5728\u3057\u307e\u3059\uff1a<\/p>\n<ul>\n  <li><strong>\u30bd\u30b1\u30c3\u30c8\u306e\u6709\u52b9\u5316\uff1a<\/strong> Init \u30b5\u30fc\u30d3\u30b9\uff08\u4f8b\uff1asystemd\uff09\u306f\u3001\u7279\u6a29\u30bd\u30b1\u30c3\u30c8\u3092\u958b\u304d\u3001\u305d\u308c\u3092\u30d7\u30ed\u30bb\u30b9\u306b\u6e21\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u79c1\u306e\u30b5\u30fc\u30d3\u30b9\u306b\u306f Bind \u6a29\u9650\u304c\u4e0d\u8981\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30dd\u30fc\u30c8\u8ee2\u9001\uff1a<\/strong> \u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30eb\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u300180\/443\u3092\u30cf\u30a4\u30dd\u30fc\u30c8\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3057\u3066\u3044\u307e\u3059\u3002\u30b5\u30fc\u30d3\u30b9\u306e\u6a29\u9650\u306f\u5909\u66f4\u3055\u308c\u305a\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u52d5\u4f5c\u306b\u3082\u5909\u5316\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n  <li><strong>\u975e\u7279\u6a29\u306e\u30ed\u30fc\u30dd\u30fc\u30c8\uff1a<\/strong> 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