{"id":12092,"date":"2020-09-11T17:47:15","date_gmt":"2020-09-11T08:47:15","guid":{"rendered":"https:\/\/itport.cloud\/?p=12092"},"modified":"2020-09-11T17:47:16","modified_gmt":"2020-09-11T08:47:16","slug":"post-12092","status":"publish","type":"post","link":"https:\/\/itport.cloud\/?p=12092","title":{"rendered":"Web\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\uff5eXSS\uff5e"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"e79baee6aca1-1\">\u76ee\u6b21<\/h2>\n\n\n\n<p><a href=\"#security1\">\u306f\u3058\u3081\u306b<\/a><br><a href=\"#security2\">XSS\u3068\u306f<\/a><br><a href=\"#security3\">\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3078\u306e\u51fa\u529b\u51e6\u7406\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u3068\u306f<\/a><br><a href=\"#security4\">\u5bfe\u7b56<\/a><br><a href=\"#security5\">\u7dcf\u8a55<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"security1\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<p>\u6700\u8fd1Web\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u3064\u3044\u3066\u5b66\u3076\u3053\u3068\u304c\u3042\u3063\u305f\u306e\u3067\u5099\u5fd8\u9332\u3068\u3057\u3066\u8a18\u4e8b\u306b\u3057\u3066\u304a\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"security2\">XSS\u3068\u306f<\/h2>\n\n\n\n<p>XSS\u306fCross Site Scripting\u306e\u7565\u79f0\u3067\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30b9\u30af\u30ea\u30d7\u30c6\u30a3\u30f3\u30b0\u3068\u547c\u3070\u308c\u307e\u3059\u3002\uff08\u4ee5\u4e0b\u3001XSS\uff09<br>XSS\u306e\u8aac\u660e\u306f\u3088\u304f\u8272\u3005\u306a\u30b5\u30a4\u30c8\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u306e\u3067\u3001\u305d\u306e\u3046\u3061\u306e\u4e00\u3064\u3092\u5f15\u7528\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p> \u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e2d\u306b\u306f\u3001\u691c\u7d22\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u8868\u793a\u753b\u9762\u3084\u500b\u4eba\u60c5\u5831\u767b\u9332\u6642\u306e\u78ba\u8a8d\u753b\u9762\u3001\u63b2\u793a \u677f\u3001\u30a6\u30a7\u30d6\u306e\u30ed\u30b0\u7d71\u8a08\u753b\u9762\u7b49\u3001\u5229\u7528\u8005\u304b\u3089\u306e\u5165\u529b\u5185\u5bb9\u3084 HTTP \u30d8\u30c3\u30c0\u306e\u60c5\u5831\u3092\u51e6\u7406\u3057\u3001\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3068\u3057 \u3066\u51fa\u529b\u3059\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u3001\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3078\u306e\u51fa\u529b\u51e6\u7406\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u3001\u305d\u306e\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u306b 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\u7b2c7\u7248\u300d22\u30da\u30fc\u30b8\u76ee\u3088\u308a<\/cite><\/blockquote>\n\n\n\n<p>\u3053\u306e\u8aac\u660e\u3092\u898b\u3066\u5206\u304b\u308b\u65b9\u306f\u3046\u3093\u3046\u3093\u3068\u9837\u3051\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u79c1\u306f\u6700\u521d\u5168\u7136\u5206\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br>\u3053\u3053\u3067\u6700\u3082\u91cd\u8981\u306a\u3053\u3068\u306f\u300c<strong> \u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3078\u306e\u51fa\u529b\u51e6\u7406\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408 <\/strong>\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<br><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"security3\"> 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class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: php; title: ; notranslate\" title=\"\">\n\"\u533f\u540d\u5229\u7528\u8005\u3055\u3093\u3088\u308a\"\n<br> \n<?php echo $_GET&#x5B;'comment'];>\n<\/pre><\/div>\n\n\n<p>\u3053\u306e\u5834\u5408\u3001\u5165\u529b\u3055\u308c\u305f\u30b3\u30e1\u30f3\u30c8\u304c\u901a\u5e38\u306e\u30b3\u30e1\u30f3\u30c8\u3067\u3042\u308c\u3070\u3088\u3044\u3067\u3059\u304c\u3001\u60aa\u610f\u306e\u3042\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u57cb\u3081\u8fbc\u3093\u3060\u5834\u5408\u306b<br>php\u306e\u51e6\u7406\u306b\u3088\u3063\u3066html\u306b\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u57cb\u3081\u8fbc\u307e\u308c\u3001\u305d\u306e\u307e\u307e\u30d6\u30e9\u30a6\u30b6\u306b\u6e21\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<br>\u30d6\u30e9\u30a6\u30b6\u306f\u305d\u308c\u3092\u30b3\u30e1\u30f3\u30c8\u3068\u3057\u3066\u3067\u306f\u306a\u304f\u3001\u30b9\u30af\u30ea\u30d7\u30c8\u3068\u3057\u3066\u8a8d\u8b58\u3057\u3001\u60aa\u610f\u306e\u3042\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002 <\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"security4\">\u5bfe\u7b56<\/h2>\n\n\n\n<p>\u3067\u306f\u300c\u51fa\u529b\u51e6\u7406\u306b\u554f\u984c\u304c\u3042\u308b\u300dWeb\u30da\u30fc\u30b8\u306f\u4f55\u3092\u3059\u308c\u3070\u3088\u3044\u306e\u304b\u3068\u3044\u3046\u304a\u8a71\u306b\u306a\u308a\u307e\u3059\u304c<br>\u3053\u3053\u306f\u30cd\u30c3\u30c8\u3067\u8abf\u3079\u3066\u307f\u308b\u3068\u3059\u3050\u306b\u898b\u3064\u304b\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u300c&lt;\u300d\u300c&gt;\u300d\u300c&amp;\u300d\u300c&#8221;\u300d\u300c&#8217;\u300d\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u3066Web\u30da\u30fc\u30b8\u306b\u8868\u793a\u3055\u305b\u308b\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<br><br>\u3053\u308c\u3060\u3051\u3060\u3068\u4ed6\u3067\u7d39\u4ecb\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u3068\u540c\u3058\u306b\u306a\u308b\u306e\u3067\u5404\u8a18\u53f7\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u7406\u7531\u3092\u8aac\u660e\u3057\u3066\u3044\u3053\u3046\u3068\u601d\u3044\u307e\u3057\u305f\u304c\u3001\u7d4c\u7def\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u8a18\u4e8b\u304c\u3042\u308a\u307e\u3057\u305f\u306e\u3067\u3053\u3061\u3089\u3092\u7d39\u4ecb\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<br>\u53c2\u8003 XSS\u5bfe\u7b56\uff1a\u3069\u306e\u6587\u5b57\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u3079\u304d\u306a\u306e\u304b<br><a href=\"https:\/\/ockeghem.hatenablog.jp\/entry\/20070510\/1178813849\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (\u65b0\u3057\u3044\u30bf\u30d6\u3067\u958b\u304f)\">https:\/\/ockeghem.hatenablog.jp\/entry\/20070510\/1178813849<\/a> <br><br>\u7d50\u8ad6\u3060\u3051\u8a00\u3044\u307e\u3059\u3068\u5404\u8a18\u53f7\u306f\u5fc5\u305a\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u8868\u793a\u3055\u308c\u308b\u5834\u6240\u306b\u3088\u3063\u3066\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u8a18\u53f7\u306f\u9055\u3044\u307e\u3059\u3002\uff085\u6587\u5b57\u5168\u3066\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u3001\u3001\uff09<br><br>HTML\u672c\u6587\u5185\uff1a\u300c&lt;\u300d\u300c\uff1e\u300d\u300c&amp;\u300d\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b<br>HTML\u30bf\u30b0\u5185\u306e\u5c5e\u6027\u5024: \u300c&lt;\u300d\u300c\uff1e\u300d\u300c&amp;\u300d \u300c&#8221;\u300d\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b<\/p>\n\n\n\n<p>PHP\u306b\u306fXSS\u306e\u6587\u5b57\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u95a2\u6570\u300chtmlspecialchars\u300d\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u305d\u308c\u3092\u4f7f\u3063\u3066\u4e0b\u8a18\u306e\u3088\u3046\u306b\u4fee\u6b63\u3059\u308c\u3070\u51fa\u6765\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: php; title: ; notranslate\" title=\"\">\n\"\u533f\u540d\u5229\u7528\u8005\u3055\u3093\u3088\u308a\"\n<br> \n<?php echo htmlspecialchars($_GET&#x5B;'comment'], ENT_QUOTES, 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class=\"wp-block-heading\" id=\"security5\">\u7dcf\u8a55<\/h2>\n\n\n\n<p>\u300c\u5165\u529b\u5024\u306e\u30c1\u30a7\u30c3\u30af\u3060\u3051\u3067\u306a\u304f\u3001\u8868\u793a\u6642\u306b\u3057\u3063\u304b\u308a\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u3053\u3068\u3067\u5bfe\u5fdc\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u306d\u3002 <br>\u307e\u305f\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u3088\u3063\u3066\u306f\u81ea\u52d5\u3067\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u3066\u304f\u308c\u308b\u3082\u306e\u3082\u3042\u3063\u305f\u308a\u3057\u307e\u3059\u304c\u3001\u540c\u3058\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3082\u3042\u308b\u5834\u5408\u306f\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u3066\u304f\u308c\u308b\u304c\u3001\u5225\u306e\u5834\u5408\u306f\u30a8\u30b9\u30b1\u30fc\u30d7\u3057\u3066\u304f\u308c\u306a\u3044\u3068\u3044\u3063\u305f\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u306e\u3067\u3088\u304f\u78ba\u8a8d\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<br><br><br>\u53c2\u8003\u8cc7\u6599\uff1aIPA\u60c5\u5831\u51e6\u7406\u63a8\u9032\u6a5f\u69cb\u300c\u5b89\u5168\u306a\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u4f5c\u308a\u65b9 \u3000\u6539\u8a02 \u7b2c7\u7248 \u300d<br><a href=\"https:\/\/www.ipa.go.jp\/security\/vuln\/websecurity.html\" target=\"_blank\" rel=\"noreferrer noopener\" aria-label=\" (\u65b0\u3057\u3044\u30bf\u30d6\u3067\u958b\u304f)\">https:\/\/www.ipa.go.jp\/security\/vuln\/websecurity.html<\/a> <br>\u53c2\u8003\u30b5\u30a4\u30c8\uff1aXSS\u5bfe\u7b56\uff1a\u3069\u306e\u6587\u5b57\u3092\u30a8\u30b9\u30b1\u30fc\u30d7\u3059\u308b\u3079\u304d\u306a\u306e\u304b<br><a rel=\"noreferrer noopener\" aria-label=\" (\u65b0\u3057\u3044\u30bf\u30d6\u3067\u958b\u304f)\" href=\"https:\/\/ockeghem.hatenablog.jp\/entry\/20070510\/1178813849\" target=\"_blank\">https:\/\/ockeghem.hatenablog.jp\/entry\/20070510\/1178813849<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u76ee\u6b21 \u306f\u3058\u3081\u306bXSS\u3068\u306f\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3078\u306e\u51fa\u529b\u51e6\u7406\u306b\u554f\u984c\u304c\u3042\u308b\u5834\u5408\u3068\u306f\u5bfe\u7b56\u7dcf\u8a55 \u306f\u3058\u3081\u306b 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