{"id":6562,"date":"2024-10-11T10:38:12","date_gmt":"2024-10-11T01:38:12","guid":{"rendered":"https:\/\/taitan916.info\/blog\/?p=6562"},"modified":"2024-07-16T03:04:01","modified_gmt":"2024-07-15T18:04:01","slug":"post-6562","status":"publish","type":"post","link":"https:\/\/taitan916.info\/blog\/archives\/6562","title":{"rendered":"PHP\u3067\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6642\u306b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u653b\u6483\u306e\u5bfe\u7b56\u3092\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>\u3042\u308b\u30b7\u30b9\u30c6\u30e0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u3057\u3066\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb(Directory Traversal)\u653b\u6483\u5bfe\u7b56\u3092\u3057\u3066\u307b\u3057\u3044\u3068\u8981\u671b\u3092\u53d7\u3051\u305f\u3002\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb\u653b\u6483\u3068\u3044\u3046\u30ef\u30fc\u30c9\u81ea\u4f53\u628a\u63e1\u3057\u3066\u3044\u306a\u304b\u3063\u305f\u306e\u3067\u305d\u306e\u8fba\u308a\u306e\u8a73\u7d30\u3068PHP\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u6642\u306e\u5bfe\u7b56\u65b9\u6cd5\u3092\u30e1\u30e2\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb(Directory Traversal)\u3068\u306f<\/h2>\n<p>\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u6271\u3046\u3088\u3046\u306a\u30b7\u30b9\u30c6\u30e0\u306b\u5bfe\u3057\u300c..\/\u300d\u306e\u3088\u3046\u306a\u7279\u6b8a\u306a\u6587\u5b57\u5217\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u901a\u5e38\u3067\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u3084\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u5185\u5bb9\u3092\u53d6\u5f97\u3082\u3057\u304f\u306f\u66f8\u304d\u63db\u3048\u308b\u3068\u3044\u3063\u305f\u653b\u6483\u306e\u3053\u3068\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u5bfe\u7b56\u65b9\u6cd5<\/h2>\n<p><a href=\"https:\/\/www.php.net\/manual\/ja\/function.basename.php\" target=\"_blank\" rel=\"noopener\">basename\u95a2\u6570<\/a>\u3067\u30d5\u30a1\u30a4\u30eb\u540d\u306e\u307f\u53d6\u308a\u51fa\u3059\u3053\u3068\u3067\u5bfe\u7b56\u3067\u304d\u308b\u6a21\u69d8\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">#NG\u30d1\u30bf\u30fc\u30f3\r\n$filename = '.\/upload\/' . $_FILES['test_file']['name'];\r\n\r\n#OK\u30d1\u30bf\u30fc\u30f3\r\n$filename = '.\/upload\/' . basename($_FILES['test_file']['name']);<\/pre>\n<p>&nbsp;<\/p>\n<h2>\u6240\u611f<\/h2>\n<p>\u666e\u6bb5\u30d5\u30a1\u30a4\u30eb\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u969b\u306f\u300c\u30e9\u30f3\u30c0\u30e0\u82f1\u6570\uff0b\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u300d\u3068\u3044\u3063\u305f\u30d5\u30a1\u30a4\u30eb\u540d\u306b\u30ea\u30cd\u30fc\u30e0\u3057\u3066\u3044\u308b\u306e\u3067\u7279\u306b\u5f71\u97ff\u306f\u306a\u3055\u305d\u3046\u3060\u3051\u3069\u3001\u305d\u306e\u307e\u307e\u306e\u30d5\u30a1\u30a4\u30eb\u540d\u3067\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u5fc5\u8981\u304c\u51fa\u3066\u304d\u305f\u5834\u5408\u306f\u4e0a\u8a18\u306e\u5bfe\u7b56\u3092\u53d6\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u53c2\u8003\u30b5\u30a4\u30c8<\/h2>\n<p><a href=\"https:\/\/teratail.com\/questions\/78163\" target=\"_blank\" rel=\"noopener\">https:\/\/teratail.com\/questions\/78163<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3042\u308b\u30b7\u30b9\u30c6\u30e0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3068\u3057\u3066\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30c8\u30e9\u30d0\u30fc\u30b5\u30eb(Directory ... <\/p>\n","protected":false},"author":1,"featured_media":1085,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-6562","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-php"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/6562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/comments?post=6562"}],"version-history":[{"count":3,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/6562\/revisions"}],"predecessor-version":[{"id":6565,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/posts\/6562\/revisions\/6565"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media\/1085"}],"wp:attachment":[{"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/media?parent=6562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/categories?post=6562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/taitan916.info\/blog\/wp-json\/wp\/v2\/tags?post=6562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}