{"id":557,"date":"2025-09-12T13:40:42","date_gmt":"2025-09-12T04:40:42","guid":{"rendered":"https:\/\/f-pat.com\/topics\/?p=557"},"modified":"2025-09-12T18:11:58","modified_gmt":"2025-09-12T09:11:58","slug":"%e3%83%9b%e3%83%bc%e3%83%a0%e3%83%9a%e3%83%bc%e3%82%b8-%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3%e3%81%ae%e9%87%8d%e8%a6%81%e6%80%a7%e3%81%a8%e5%85%b7%e4%bd%93%e7%9a%84%e3%81%aa%e5%af%be","status":"publish","type":"post","link":"https:\/\/f-pat.com\/topics\/?p=557","title":{"rendered":"XSS\u3068\u306f\uff1fJavaScript\u3092\u60aa\u7528\u3057\u305f\u653b\u6483\u3068\u305d\u306e\u5bfe\u7b56\u3092\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"
\n

\u306f\u3058\u3081\u306b<\/h2>\n

\"\"Web\u30b5\u30a4\u30c8\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u3044\u3046\u3068\u3001\u30a6\u30a4\u30eb\u30b9\u5bfe\u7b56\u30bd\u30d5\u30c8\u3084SSL\u8a3c\u660e\u66f8\u3092\u601d\u3044\u6d6e\u304b\u3079\u308b\u65b9\u304c\u591a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001\u5b9f\u969b\u306b\u306fWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6f5c\u3080\u300c\u8106\u5f31\u6027\uff08\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u7a74\uff09\u300d\u304c\u653b\u6483\u8005\u306b\u72d9\u308f\u308c\u308b\u30b1\u30fc\u30b9\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u306e\u4ee3\u8868\u4f8b\u304c XSS\uff08\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30b9\u30af\u30ea\u30d7\u30c6\u30a3\u30f3\u30b0\uff09 \u3067\u3059\u3002\u7279\u306bJavaScript\u3092\u60aa\u7528\u3059\u308b\u5f62\u3067\u884c\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u304f\u3001\u3082\u3057\u81ea\u793e\u30b5\u30a4\u30c8\u306b\u4ed5\u639b\u3051\u3089\u308c\u3066\u3057\u307e\u3046\u3068\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u500b\u4eba\u60c5\u5831\u6f0f\u3048\u3044\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3\u4e57\u3063\u53d6\u308a\u30fb\u6539\u3056\u3093\u88ab\u5bb3\u306a\u3069\u5927\u304d\u306a\u30ea\u30b9\u30af\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n

\u4eca\u56de\u306f\u3001XSS\u304c\u3069\u3093\u306a\u653b\u6483\u306a\u306e\u304b\u3001JavaScript\u3068\u3069\u3046\u95a2\u308f\u3063\u3066\u3044\u308b\u306e\u304b\u3001\u305d\u3057\u3066\u30b5\u30a4\u30c8\u904b\u55b6\u8005\u3084\u958b\u767a\u8005\u304c\u53d6\u308b\u3079\u304d\u5bfe\u7b56\u306b\u3064\u3044\u3066\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n

\n

XSS\uff08\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30b9\u30af\u30ea\u30d7\u30c6\u30a3\u30f3\u30b0\uff09\u3068\u306f\uff1f<\/h2>\n

XSS\u3068\u306f\u3001Web\u30b5\u30a4\u30c8\u306b\u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3059\u308b\u30c7\u30fc\u30bf\u3092\u60aa\u7528\u3057\u3066\u3001\u4e0d\u6b63\u306a\u30b9\u30af\u30ea\u30d7\u30c8\uff08\u4e3b\u306bJavaScript\uff09\u3092\u57cb\u3081\u8fbc\u3080\u653b\u6483\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n

\u4f8b\u3048\u3070\u63b2\u793a\u677f\u3084\u30b3\u30e1\u30f3\u30c8\u6b04\u306b\u5165\u529b\u3057\u305f\u5185\u5bb9\u304c\u3001\u305d\u306e\u307e\u307eWeb\u30da\u30fc\u30b8\u306b\u8868\u793a\u3055\u308c\u308b\u5834\u5408\u3001\u653b\u6483\u8005\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5165\u529b\u3092\u4ed5\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

<script>alert('\u3042\u306a\u305f\u306e\u30bb\u30c3\u30b7\u30e7\u30f3\u60c5\u5831\u304c\u76d7\u307e\u308c\u307e\u3059');<\/script><\/code><\/pre>\n
\u3082\u3057\u3053\u306e\u5165\u529b\u304c\u305d\u306e\u307e\u307e\u4ed6\u306e\u5229\u7528\u8005\u306e\u30d6\u30e9\u30a6\u30b6\u306b\u8868\u793a\u3055\u308c\u308c\u3070\u3001\u653b\u6483\u8005\u304c\u610f\u56f3\u3057\u305fJavaScript\u304c\u5b9f\u884c\u3055\u308c\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u88ab\u5bb3\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
    \n
  • Cookie\u3092\u76d7\u307e\u308c\u3066\u30ed\u30b0\u30a4\u30f3\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4e57\u3063\u53d6\u3089\u308c\u308b<\/li>\n
  • \u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30b5\u30a4\u30c8\u3078\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3055\u308c\u308b<\/li>\n
  • \u507d\u30d5\u30a9\u30fc\u30e0\u3092\u8868\u793a\u3055\u305b\u3001\u5165\u529b\u60c5\u5831\u3092\u629c\u304d\u53d6\u3089\u308c\u308b<\/li>\n
  • \u30da\u30fc\u30b8\u306e\u898b\u305f\u76ee\u3092\u6539\u3056\u3093\u3055\u308c\u3001\u4fe1\u983c\u6027\u3092\u5931\u3046<\/li>\n<\/ul>\n<\/div>\n
    \n
    XSS\u306e\u7a2e\u985e<\/h2>\n
    XSS\u306b\u306f\u5927\u304d\u304f\u5206\u3051\u30663\u3064\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
    1. \u53cd\u5c04\u578b\uff08Reflected XSS\uff09<\/h3>\n
    \u691c\u7d22\u30d5\u30a9\u30fc\u30e0\u3084URL\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u5165\u529b\u3057\u305f\u5185\u5bb9\u304c\u3001\u305d\u306e\u307e\u307e\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u542b\u307e\u308c\u308b\u30bf\u30a4\u30d7\u3067\u3059\u3002\u653b\u6483\u8005\u306f\u7d30\u5de5\u3057\u305fURL\u3092\u30e1\u30fc\u30eb\u3084SNS\u3067\u9001\u308a\u3064\u3051\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30af\u30ea\u30c3\u30af\u3059\u308b\u3053\u3068\u3067\u653b\u6483\u304c\u6210\u7acb\u3057\u307e\u3059\u3002<\/p>\n
    2. \u6c38\u7d9a\u578b\uff08Stored XSS\uff09<\/h3>\n
    \u63b2\u793a\u677f\u3084\u30b3\u30e1\u30f3\u30c8\u6b04\u306b\u5165\u529b\u3057\u305f\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3055\u308c\u3001\u4ed6\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u30da\u30fc\u30b8\u3092\u95b2\u89a7\u3057\u305f\u3068\u304d\u306b\u5b9f\u884c\u3055\u308c\u308b\u30bf\u30a4\u30d7\u3067\u3059\u3002\u88ab\u5bb3\u304c\u5e83\u7bc4\u56f2\u306b\u53ca\u3076\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u3001\u6700\u3082\u5371\u967a\u3067\u3059\u3002<\/p>\n
    3. DOM\u578b\uff08DOM-based XSS\uff09<\/h3>\n
    \u30b5\u30fc\u30d0\u30fc\u5074\u3067\u306f\u306a\u304f\u3001\u30d6\u30e9\u30a6\u30b6\u4e0a\u306eJavaScript\u51e6\u7406\u304c\u539f\u56e0\u3067\u767a\u751f\u3059\u308bXSS\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001JavaScript\u3067 location.hash<\/code> \u3084 document.write<\/code> \u3092\u4e0d\u7528\u610f\u306b\u6271\u3063\u305f\u5834\u5408\u306b\u653b\u6483\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n
    \n
    \u306a\u305cJavaScript\u304c\u72d9\u308f\u308c\u308b\u306e\u304b\uff1f<\/h2>\n
    XSS\u653b\u6483\u3067\u6700\u3082\u591a\u7528\u3055\u308c\u308b\u306e\u304c JavaScript \u3067\u3059\u3002\u305d\u306e\u7406\u7531\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
      \n
    • JavaScript\u306f\u30d6\u30e9\u30a6\u30b6\u3067\u81ea\u7531\u306b\u52d5\u4f5c\u3059\u308b\u305f\u3081\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u60c5\u5831\uff08Cookie\u3084\u30d5\u30a9\u30fc\u30e0\u5165\u529b\uff09\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/li>\n
    • \u30da\u30fc\u30b8\u3092\u66f8\u304d\u63db\u3048\u305f\u308a\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3055\u305b\u305f\u308a\u3067\u304d\u308b<\/li>\n
    • \u591a\u304f\u306eWeb\u30b5\u30a4\u30c8\u3067\u6709\u52b9\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u6a19\u6e96\u7684\u306b\u5229\u7528\u3067\u304d\u308b<\/li>\n<\/ul>\n
      \u3064\u307e\u308a\u3001\u653b\u6483\u8005\u306b\u3068\u3063\u3066\u300c\u4e00\u756a\u4f7f\u3044\u3084\u3059\u304f\u52b9\u679c\u7684\u306a\u6b66\u5668\u300d\u304cJavaScript\u306a\u306e\u3067\u3059\u3002<\/p>\n<\/div>\n
      \n
      XSS\u5bfe\u7b56\uff08JavaScript\u60aa\u7528\u3092\u9632\u3050\u65b9\u6cd5\uff09<\/h2>\n
        \n
      1. \u5165\u529b\u5024\u306e\u30a8\u30b9\u30b1\u30fc\u30d7\u51e6\u7406<\/span>
        \u30e6\u30fc\u30b6\u30fc\u306e\u5165\u529b\u3092\u305d\u306e\u307e\u307e\u8868\u793a\u305b\u305a\u3001\u5fc5\u305a\u30a8\u30b9\u30b1\u30fc\u30d7\uff08\u7121\u5bb3\u5316\uff09\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n
      2. \u5165\u529b\u5024\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/span>
        \u4e0d\u8981\u306a\u30bf\u30b0\u3084\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u6392\u9664\u3059\u308b\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n
      3. \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d8\u30c3\u30c0\u30fc\u306e\u8a2d\u5b9a<\/span>
        CSP\u3084HttpOnly\u306a\u3069\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u30ea\u30b9\u30af\u3092\u8efd\u6e1b\u3067\u304d\u307e\u3059\u3002<\/li>\n
      4. \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u5229\u7528<\/span>
        \u6a19\u6e96\u306e\u30a8\u30b9\u30b1\u30fc\u30d7\u6a5f\u80fd\u3092\u4f7f\u3046\u3053\u3068\u3067\u5b89\u5168\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002<\/li>\n
      5. \u5b9a\u671f\u7684\u306a\u8106\u5f31\u6027\u8a3a\u65ad<\/span>
        \u8106\u5f31\u6027\u30b9\u30ad\u30e3\u30ca\u30fc\u3092\u7528\u3044\u3066\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/ol>\n<\/div>\n
        \n
        \u3082\u3057XSS\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3063\u305f\u3089\uff1f<\/h2>\n
          \n
        • \u554f\u984c\u306e\u3042\u308b\u30da\u30fc\u30b8\u3092\u4e00\u6642\u7684\u306b\u9589\u9396\u3059\u308b<\/li>\n
        • \u5165\u529b\u51e6\u7406\u3084\u51fa\u529b\u51e6\u7406\u3092\u4fee\u6b63\u3059\u308b<\/li>\n
        • \u88ab\u5bb3\u304c\u51fa\u3066\u3044\u308c\u3070\u3001\u5229\u7528\u8005\u306b\u5468\u77e5\u30fb\u8b1d\u7f6a\u3092\u884c\u3046<\/li>\n
        • \u6539\u4fee\u5f8c\u306f\u5fc5\u305a\u518d\u5ea6\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a3a\u65ad\u3092\u5b9f\u65bd\u3059\u308b<\/li>\n<\/ul>\n<\/div>\n
          \n
          \u307e\u3068\u3081<\/h2>\n
          \"\"<\/p>\n
            \n
          • XSS\u306f\u300cJavaScript\u3092\u60aa\u7528\u3057\u305f\u653b\u6483\u300d\u3067\u3001\u30b5\u30a4\u30c8\u5229\u7528\u8005\u306e\u4fe1\u983c\u3092\u5927\u304d\u304f\u640d\u306a\u3046\u8105\u5a01<\/li>\n
          • \u53cd\u5c04\u578b\u30fb\u6c38\u7d9a\u578b\u30fbDOM\u578b\u306e3\u7a2e\u985e\u304c\u3042\u308a\u3001\u7279\u306b\u6c38\u7d9a\u578b\u306f\u5371\u967a\u5ea6\u304c\u9ad8\u3044<\/li>\n
          • \u5bfe\u7b56\u306e\u57fa\u672c\u306f\u300c\u5165\u529b\u5024\u306e\u30a8\u30b9\u30b1\u30fc\u30d7\u300d\u300cCSP\u306a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d8\u30c3\u30c0\u30fc\u300d\u300c\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u6a5f\u80fd\u306e\u6d3b\u7528\u300d<\/li>\n
          • \u5b9a\u671f\u7684\u306a\u30c1\u30a7\u30c3\u30af\u3068\u8fc5\u901f\u306a\u5bfe\u5fdc\u304c\u88ab\u5bb3\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u30dd\u30a4\u30f3\u30c8<\/li>\n<\/ul>\n
            Web\u30b5\u30a4\u30c8\u306e\u5b89\u5168\u6027\u306f\u3001\u8a2a\u308c\u308b\u30e6\u30fc\u30b6\u30fc\u3068\u306e\u4fe1\u983c\u95a2\u4fc2\u305d\u306e\u3082\u306e\u3067\u3059\u3002
            \n\u300c\u81ea\u5206\u306e\u30b5\u30a4\u30c8\u306f\u5c0f\u898f\u6a21\u3060\u304b\u3089\u5927\u4e08\u592b\u300d\u3068\u6cb9\u65ad\u305b\u305a\u3001XSS\u3092\u306f\u3058\u3081\u3068\u3057\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u4e00\u6b69\u305a\u3064\u5b9f\u8df5\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
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