{"id":476846,"date":"2023-08-09T09:04:34","date_gmt":"2023-08-09T09:04:34","guid":{"rendered":""},"modified":"2023-09-05T11:13:34","modified_gmt":"2023-09-05T11:13:34","slug":"directory-traversal-attack","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/directory-traversal-attack\/","title":{"rendered":"T\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c"},"content":{"rendered":"<p>C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i \u0111\u01b0\u1eddng d\u1eabn, th\u1ec3 hi\u1ec7n m\u1ed9t r\u1ee7i ro \u0111\u00e1ng k\u1ec3 trong l\u0129nh v\u1ef1c b\u1ea3o m\u1eadt web. Ch\u00fang ch\u1ee7 y\u1ebfu khai th\u00e1c l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt trong ch\u1ee9c n\u0103ng truy c\u1eadp c\u00e1c t\u1ec7p c\u00f3 tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a \u1ee9ng d\u1ee5ng web. C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng b\u1ea5t ch\u00ednh truy c\u1eadp c\u00e1c t\u1ec7p v\u00e0 th\u01b0 m\u1ee5c \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef b\u00ean ngo\u00e0i th\u01b0 m\u1ee5c webroot b\u1eb1ng c\u00e1ch thao t\u00e1c c\u00e1c bi\u1ebfn tham chi\u1ebfu c\u00e1c t\u1ec7p c\u00f3 chu\u1ed7i \u201cdot-dot-slash (..\/)\u201d.<\/p>\n<h2>S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a Internet khi c\u00e1c \u1ee9ng d\u1ee5ng web l\u1ea7n \u0111\u1ea7u ti\u00ean b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng c\u00e1c t\u1eadp l\u1ec7nh \u0111\u1ec3 truy c\u1eadp c\u00e1c t\u1ec7p ph\u00eda m\u00e1y ch\u1ee7. Khi c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng web tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p h\u01a1n, nguy c\u01a1 x\u1ea3y ra c\u00e1c lo\u1ea1i l\u1ed7 h\u1ed5ng n\u00e0y c\u0169ng t\u0103ng l\u00ean.<\/p>\n<p>Vi\u1ec7c \u0111\u1ec1 c\u1eadp c\u00f4ng khai l\u1ea7n \u0111\u1ea7u ti\u00ean v\u1ec1 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c c\u00f3 ph\u1ea7n kh\u00f3 x\u00e1c \u0111\u1ecbnh do t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ee7a l\u1ed7 h\u1ed5ng n\u00e0y. Tuy nhi\u00ean, m\u1ed1i lo ng\u1ea1i v\u1ec1 b\u1ea3o m\u1eadt tr\u1edf n\u00ean n\u1ed5i b\u1eadt h\u01a1n v\u00e0o cu\u1ed1i nh\u1eefng n\u0103m 1990 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 2000, khi c\u00e1c \u1ee9ng d\u1ee5ng web tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn v\u00e0 c\u01a1 h\u1ed9i khai th\u00e1c c\u00e1c tham chi\u1ebfu t\u1ec7p kh\u00f4ng an to\u00e0n t\u0103ng l\u00ean.<\/p>\n<h2>M\u1edf r\u1ed9ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>T\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c l\u00e0 m\u1ed9t d\u1ea1ng khai th\u00e1c HTTP trong \u0111\u00f3 tin t\u1eb7c truy c\u1eadp v\u00e0o th\u01b0 m\u1ee5c c\u1ee7a m\u00e1y ch\u1ee7 th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f4ng khai. K\u1ebb t\u1ea5n c\u00f4ng khai th\u00e1c vi\u1ec7c x\u00e1c th\u1ef1c ho\u1eb7c s\u00e0ng l\u1ecdc b\u1ea3o m\u1eadt kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ed1i v\u1edbi t\u00ean t\u1ec7p \u0111\u1ea7u v\u00e0o do ng\u01b0\u1eddi d\u00f9ng cung c\u1ea5p, t\u1eeb \u0111\u00f3 cho ph\u00e9p ch\u00fang tho\u00e1t ra kh\u1ecfi m\u00f4i tr\u01b0\u1eddng b\u1ecb h\u1ea1n ch\u1ebf.<\/p>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng tr\u00ecnh t\u1ef1 truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 trong c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean URL, nh\u01b0ng ch\u00fang c\u0169ng c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n trong vi\u1ec7c ch\u00e8n ti\u00eau \u0111\u1ec1, thao t\u00e1c cookie ho\u1eb7c th\u1eadm ch\u00ed trong c\u00e1c tham s\u1ed1 POST. Th\u00f4ng qua \u0111\u00f3, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 xem c\u00e1c th\u01b0 m\u1ee5c b\u1ecb h\u1ea1n ch\u1ebf v\u00e0 th\u1ef1c thi c\u00e1c l\u1ec7nh b\u00ean ngo\u00e0i th\u01b0 m\u1ee5c g\u1ed1c c\u1ee7a m\u00e1y ch\u1ee7 web, t\u1eeb \u0111\u00f3 c\u00f3 \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o th\u00f4ng tin nh\u1ea1y c\u1ea3m.<\/p>\n<h2>C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch khai th\u00e1c vi\u1ec7c x\u00e1c th\u1ef1c\/kh\u1eed tr\u00f9ng kh\u00f4ng \u0111\u1ee7 b\u1ea3o m\u1eadt \u0111\u1ed1i v\u1edbi t\u00ean t\u1ec7p \u0111\u1ea7u v\u00e0o do ng\u01b0\u1eddi d\u00f9ng cung c\u1ea5p, do \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 thao t\u00fang nh\u1eefng t\u00ean n\u00e0y \u0111\u1ec3 nh\u1ea3y ra ngo\u00e0i v\u1ecb tr\u00ed b\u1ecb h\u1ea1n ch\u1ebf.<\/p>\n<p>\u1ede d\u1ea1ng qu\u00e1 \u0111\u01a1n gi\u1ea3n, h\u00e3y xem x\u00e9t t\u00ecnh hu\u1ed1ng trong \u0111\u00f3 m\u1ed9t \u1ee9ng d\u1ee5ng \u0111ang c\u1ed1 truy c\u1eadp t\u1ec7p h\u00ecnh \u1ea3nh t\u1eeb m\u00e1y ch\u1ee7:<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>arduino<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>Sao ch\u00e9p m\u00e3<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-arduino\" data-no-translation=\"\">http:<span class=\"hljs-comment\">\/\/example.com\/app?file=logo.jpg<\/span>\n<\/code><\/div><\/div><\/pre>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, \u1ee9ng d\u1ee5ng s\u1ebd m\u1edf t\u1ec7p <code data-no-translation=\"\">logo.jpg<\/code> t\u1eeb th\u01b0 m\u1ee5c h\u00ecnh \u1ea3nh c\u1ee7a n\u00f3. Tuy nhi\u00ean, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng chu\u1ed7i \u201cdot-dot-slash (..\/)\u201d \u0111\u1ec3 di chuy\u1ec3n l\u00ean th\u01b0 m\u1ee5c m\u1eb9, sau \u0111\u00f3 truy c\u1eadp c\u00e1c t\u1ec7p tr\u00e1i ph\u00e9p. V\u00ed d\u1ee5:<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>\u0111\u00e1nh \u0111\u1eadp<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>Sao ch\u00e9p m\u00e3<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-bash\" data-no-translation=\"\">http:\/\/example.com\/app?file=..\/..\/etc\/passwd\n<\/code><\/div><\/div><\/pre>\n<p>\u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c \u1ee9ng d\u1ee5ng hi\u1ec3n th\u1ecb c\u00e1c t\u1ec7p h\u1ec7 th\u1ed1ng nh\u1ea1y c\u1ea3m.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<ol>\n<li>\n<p><strong>Thao t\u00e1c bi\u1ebfn:<\/strong> T\u00ednh n\u0103ng c\u01a1 b\u1ea3n c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c li\u00ean quan \u0111\u1ebfn vi\u1ec7c thao t\u00fang c\u00e1c bi\u1ebfn tham chi\u1ebfu c\u00e1c t\u1ec7p c\u00f3 chu\u1ed7i \u201cdot-dot-slash (..\/)\u201d.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e1 v\u1ee1 c\u00e1c r\u00e0ng bu\u1ed9c:<\/strong> N\u00f3 cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng tho\u00e1t ra kh\u1ecfi th\u01b0 m\u1ee5c g\u1ed1c c\u1ee7a \u1ee9ng d\u1ee5ng v\u00e0 truy c\u1eadp c\u00e1c ph\u1ea7n kh\u00e1c c\u1ee7a h\u1ec7 th\u1ed1ng t\u1ec7p.<\/p>\n<\/li>\n<li>\n<p><strong>Khai th\u00e1c x\u00e1c th\u1ef1c y\u1ebfu:<\/strong> C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c khai th\u00e1c kh\u1ea3 n\u0103ng x\u00e1c th\u1ef1c ho\u1eb7c l\u00e0m s\u1ea1ch \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng y\u1ebfu.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>M\u1eb7c d\u00f9 nguy\u00ean t\u1eafc c\u1ed1t l\u00f5i \u0111\u1eb1ng sau c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c v\u1eabn gi\u1eef nguy\u00ean nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 bi\u1ec3u hi\u1ec7n theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau d\u1ef1a tr\u00ean ng\u1eef c\u1ea3nh v\u00e0 \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp:<\/p>\n<ol>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean URL:<\/strong> \u0110i\u1ec1u n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c \u0111\u01b0a \u0111\u1ea7u v\u00e0o \u0111\u1ed9c h\u1ea1i v\u00e0o URL \u0111\u1ec3 duy\u1ec7t qua c\u00e1c th\u01b0 m\u1ee5c.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean h\u00ecnh th\u1ee9c:<\/strong> \u0110\u1ea7u v\u00e0o \u0111\u1ed9c h\u1ea1i \u0111\u01b0\u1ee3c ch\u00e8n v\u00e0o c\u00e1c tr\u01b0\u1eddng bi\u1ec3u m\u1eabu \u0111\u1ec3 khai th\u00e1c c\u00e1c t\u1eadp l\u1ec7nh ph\u00eda m\u00e1y ch\u1ee7 d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean cookie:<\/strong> Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng thao t\u00fang cookie \u0111\u1ec3 duy\u1ec7t qua c\u00e1c th\u01b0 m\u1ee5c v\u00e0 truy c\u1eadp d\u1eef li\u1ec7u tr\u00e1i ph\u00e9p.<\/p>\n<\/li>\n<\/ol>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean URL<\/td>\n<td>\u0110\u01b0a th\u00f4ng tin \u0111\u1ea7u v\u00e0o \u0111\u1ed9c h\u1ea1i v\u00e0o URL \u0111\u1ec3 duy\u1ec7t qua c\u00e1c th\u01b0 m\u1ee5c.<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean h\u00ecnh th\u1ee9c<\/td>\n<td>Ch\u00e8n d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o \u0111\u1ed9c h\u1ea1i v\u00e0o c\u00e1c tr\u01b0\u1eddng bi\u1ec3u m\u1eabu \u0111\u1ec3 khai th\u00e1c c\u00e1c t\u1eadp l\u1ec7nh ph\u00eda m\u00e1y ch\u1ee7.<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean cookie<\/td>\n<td>Thao t\u00e1c cookie \u0111\u1ec3 duy\u1ec7t qua c\u00e1c th\u01b0 m\u1ee5c v\u00e0 truy c\u1eadp d\u1eef li\u1ec7u tr\u00e1i ph\u00e9p.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>V\u1ea5n \u0111\u1ec1 ch\u00ednh c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c l\u00e0 truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o c\u00e1c t\u1ec7p v\u00e0 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn r\u00f2 r\u1ec9 d\u1eef li\u1ec7u, m\u1ea5t t\u00ednh b\u1ea3o m\u1eadt v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p cho k\u1ebb t\u1ea5n c\u00f4ng c\u00e1c vect\u01a1 t\u1ea5n c\u00f4ng ti\u1ebfp theo (nh\u01b0 l\u1ea5y th\u00f4ng tin x\u00e1c th\u1ef1c c\u01a1 s\u1edf d\u1eef li\u1ec7u t\u1eeb c\u00e1c t\u1ec7p c\u1ea5u h\u00ecnh).<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 gi\u1ea3i ph\u00e1p:<\/p>\n<ol>\n<li>\n<p><strong>X\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o:<\/strong> \u0110\u1ea3m b\u1ea3o x\u00e1c th\u1ef1c m\u1ea1nh m\u1ebd c\u00e1c \u0111\u1ea7u v\u00e0o do ng\u01b0\u1eddi d\u00f9ng cung c\u1ea5p. Kh\u00f4ng cho ph\u00e9p \u201c..\u201d ho\u1eb7c \u201c\/\u201d l\u00e0m m\u1ed9t ph\u1ea7n \u0111\u1ea7u v\u00e0o.<\/p>\n<\/li>\n<li>\n<p><strong>Ki\u1ec3m so\u00e1t truy c\u1eadp:<\/strong> Th\u1ef1c hi\u1ec7n ki\u1ec3m so\u00e1t truy c\u1eadp th\u00edch h\u1ee3p. \u0110\u1eebng ch\u1ec9 d\u1ef1a v\u00e0o \u0111\u01b0\u1eddng d\u1eabn t\u1ec7p \u0111\u01b0\u1ee3c cung c\u1ea5p \u0111\u1ec3 \u1ee7y quy\u1ec1n cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<\/li>\n<li>\n<p><strong>Nguy\u00ean t\u1eafc \u0111\u1eb7c quy\u1ec1n t\u1ed1i thi\u1ec3u:<\/strong> Ch\u1ea1y \u1ee9ng d\u1ee5ng v\u1edbi \u00edt \u0111\u1eb7c quy\u1ec1n c\u1ea7n thi\u1ebft nh\u1ea5t, gi\u1ea3m thi\u1ec7t h\u1ea1i ti\u1ec1m t\u00e0ng t\u1eeb m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c.<\/p>\n<\/li>\n<\/ol>\n<h2>T\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c v\u00e0 c\u00e1c \u0111i\u1ec1u kho\u1ea3n t\u01b0\u01a1ng t\u1ef1<\/h2>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt ng\u1eef<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/td>\n<td>Khai th\u00e1c l\u1ed7 h\u1ed5ng trong quy tr\u00ecnh nh\u1eadp li\u1ec7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 truy c\u1eadp c\u00e1c t\u1ec7p v\u00e0 th\u01b0 m\u1ee5c tr\u00e1i ph\u00e9p.<\/td>\n<\/tr>\n<tr>\n<td>Bao g\u1ed3m t\u1ec7p t\u1eeb xa (RFI)<\/td>\n<td>K\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng d\u1eabn nh\u1eadp d\u1eef li\u1ec7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 t\u1ea3i t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i l\u00ean m\u00e1y ch\u1ee7 c\u1ee7a trang web.<\/td>\n<\/tr>\n<tr>\n<td>Bao g\u1ed3m t\u1ec7p c\u1ee5c b\u1ed9 (LFI)<\/td>\n<td>K\u1ebb t\u1ea5n c\u00f4ng thao t\u00fang m\u1ed9t trang web \u0111\u1ec3 th\u1ef1c thi ho\u1eb7c ti\u1ebft l\u1ed9 n\u1ed9i dung c\u1ee7a c\u00e1c t\u1ec7p tr\u00ean m\u00e1y ch\u1ee7 web.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Vi\u1ec5n c\u1ea3nh t\u01b0\u01a1ng lai v\u00e0 c\u00f4ng ngh\u1ec7 li\u00ean quan \u0111\u1ebfn t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>Khi b\u1ed1i c\u1ea3nh ph\u00e1t tri\u1ec3n web ph\u00e1t tri\u1ec3n, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p v\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c c\u00f3 th\u1ec3 tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p h\u01a1n. Tuy nhi\u00ean, n\u1ec1n t\u1ea3ng c\u1ee7a vi\u1ec7c ph\u00f2ng ng\u1eeba c\u00f3 th\u1ec3 v\u1eabn n\u1eb1m \u1edf vi\u1ec7c x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o m\u1ea1nh m\u1ebd v\u00e0 c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng h\u1ee3p l\u00fd.<\/p>\n<p>T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web, h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n b\u1ea5t th\u01b0\u1eddng v\u00e0 thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y cho h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n x\u00e2m nh\u1eadp c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong c\u00e1c chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady trong t\u01b0\u01a1ng lai.<\/p>\n<h2>K\u1ebft n\u1ed1i gi\u1eefa m\u00e1y ch\u1ee7 proxy v\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ph\u1ee5c v\u1ee5 nh\u01b0 m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt b\u1ed5 sung ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c. B\u1eb1ng c\u00e1ch l\u1ecdc c\u00e1c y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7, ch\u00fang c\u00f3 th\u1ec3 gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c m\u1eabu ho\u1eb7c d\u1ea5u hi\u1ec7u b\u1ea5t th\u01b0\u1eddng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c, t\u1eeb \u0111\u00f3 ng\u0103n ch\u00fang ti\u1ebfp c\u1eadn m\u00e1y ch\u1ee7.<\/p>\n<p>V\u00ed d\u1ee5: OneProxy cung c\u1ea5p gi\u1ea3i ph\u00e1p m\u00e1y ch\u1ee7 proxy m\u1ea1nh m\u1ebd c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong chi\u1ebfn l\u01b0\u1ee3c ph\u00f2ng th\u1ee7 c\u1ee7a b\u1ea1n tr\u01b0\u1edbc c\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng n\u00e0y.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ol>\n<li><a href=\"https:\/\/owasp.org\/www-community\/attacks\/Path_Traversal\" target=\"_new\" rel=\"noopener nofollow\">T\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i \u0111\u01b0\u1eddng d\u1eabn OWASP<\/a><\/li>\n<li><a href=\"https:\/\/www.acunetix.com\/blog\/articles\/directory-traversal\/\" target=\"_new\" rel=\"noopener nofollow\">C\u00e1c k\u1ef9 thu\u1eadt gi\u1ea3m thi\u1ec3u v\u00e0 t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/a><\/li>\n<li><a href=\"https:\/\/cheatsheetseries.owasp.org\/cheatsheets\/File_Path_Traversal_Prevention_Cheat_Sheet.html\" target=\"_new\" rel=\"noopener nofollow\">Ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng truy\u1ec1n t\u1ea3i th\u01b0 m\u1ee5c<\/a><\/li>\n<li><a href=\"https:\/\/www.owasp.org\/index.php\/Guide_to_Building_Secure_Web_Applications_and_Web_Services\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn OWASP \u0111\u1ec3 x\u00e2y d\u1ef1ng c\u00e1c \u1ee9ng d\u1ee5ng web v\u00e0 d\u1ecbch v\u1ee5 web an to\u00e0n<\/a><\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/en-gb\/learning\/security\/glossary\/what-is-a-proxy-server\/\" target=\"_new\" rel=\"noopener nofollow\">M\u00e1y ch\u1ee7 proxy v\u00e0 b\u1ea3o m\u1eadt<\/a><\/li>\n<\/ol>","protected":false},"featured_media":476847,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476846","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Directory Traversal Attack: An In-Depth Examination<\/mark>","faq_items":[{"question":"What is a Directory Traversal Attack?","answer":"<p>A Directory Traversal Attack, also known as a path traversal attack, is a type of HTTP exploit that allows attackers to access restricted directories and execute commands outside of the web server's root directory. This is accomplished by exploiting insufficient security validation or sanitization of user-supplied input filenames.<\/p>"},{"question":"How did Directory Traversal Attacks originate?","answer":"<p>Directory Traversal Attacks originated during the early days of the internet when web applications began utilizing scripts to access server-side files. As technology progressed and web applications became more complex, the potential for these types of vulnerabilities also increased.<\/p>"},{"question":"How does a Directory Traversal Attack work?","answer":"<p>Directory Traversal Attacks work by manipulating variables that reference files with \"dot-dot-slash (..\/)\" sequences. By exploiting weak security validation or sanitization of user inputs, an attacker can access files and directories outside the webroot folder.<\/p>"},{"question":"What are the key features of Directory Traversal Attacks?","answer":"<p>Key features of Directory Traversal Attacks include the manipulation of variables to traverse directories, the ability to break out of the application's root directory, and the exploitation of weak validation of user inputs.<\/p>"},{"question":"What are the different types of Directory Traversal Attacks?","answer":"<p>Directory Traversal Attacks can be categorized into URL-based, form-based, and cookie-based attacks. In each type, attackers manipulate inputs in different ways to exploit server-side vulnerabilities and traverse directories.<\/p>"},{"question":"How can Directory Traversal Attacks be prevented?","answer":"<p>Directory Traversal Attacks can be prevented through robust input validation, proper access control, and the principle of least privilege. This involves disallowing certain inputs like \"..\" or \"\/\", not relying solely on the supplied file path for user authorization, and running the application with the least privileges necessary.<\/p>"},{"question":"How do Directory Traversal Attacks compare with similar terms like Remote File Inclusion (RFI) and Local File Inclusion (LFI)?","answer":"<p>While Directory Traversal Attacks exploit vulnerabilities to access unauthorized files and directories, Remote File Inclusion (RFI) involves an attacker uploading a malicious script into a website's server, and Local File Inclusion (LFI) manipulates a website into executing or revealing the contents of files on the web server.<\/p>"},{"question":"What are the future perspectives and technologies related to Directory Traversal Attacks?","answer":"<p>Future perspectives suggest that as web development evolves, the methods to perform Directory Traversal Attacks may become more sophisticated. Web application firewalls, anomaly detection systems, and machine learning algorithms could play a significant role in future mitigation strategies against such attacks.<\/p>"},{"question":"How do Proxy Servers help with Directory Traversal Attacks?","answer":"<p>Proxy servers, like OneProxy, can serve as an additional layer of security against Directory Traversal Attacks. By filtering requests and responses between the client and the server, they can help detect unusual patterns or signs of Directory Traversal Attacks, preventing them from reaching the server.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476846\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476847"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}