{"id":476921,"date":"2023-08-09T09:05:02","date_gmt":"2023-08-09T09:05:02","guid":{"rendered":""},"modified":"2023-09-05T11:13:39","modified_gmt":"2023-09-05T11:13:39","slug":"dns-rebinding-attack","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/dns-rebinding-attack\/","title":{"rendered":"T\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS"},"content":{"rendered":"

T\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p tinh vi \u0111\u01b0\u1ee3c c\u00e1c t\u00e1c nh\u00e2n \u0111\u1ed9c h\u1ea1i s\u1eed d\u1ee5ng \u0111\u1ec3 khai th\u00e1c tr\u00ecnh duy\u1ec7t web v\u00e0 c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt c\u1ee7a ch\u00fang. N\u00f3 t\u1eadn d\u1ee5ng s\u1ef1 tin c\u1eady v\u1ed1n c\u00f3 trong DNS (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) \u0111\u1ec3 v\u01b0\u1ee3t qua Ch\u00ednh s\u00e1ch c\u00f9ng ngu\u1ed3n g\u1ed1c (SOP) do tr\u00ecnh duy\u1ec7t web th\u1ef1c thi. Cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp c\u00e1c trang web t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 m\u1ea1ng, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn, m\u00e1y \u1ea3nh, m\u00e1y in ho\u1eb7c th\u1eadm ch\u00ed c\u1ea3 h\u1ec7 th\u1ed1ng n\u1ed9i b\u1ed9 c\u1ee7a c\u00f4ng ty. B\u1eb1ng c\u00e1ch thao t\u00fang ph\u1ea3n h\u1ed3i DNS, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o th\u00f4ng tin nh\u1ea1y c\u1ea3m, th\u1ef1c thi m\u00e3 t\u00f9y \u00fd ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c h\u00e0nh \u0111\u1ed9ng \u0111\u1ed9c h\u1ea1i kh\u00e1c.<\/p>\n

L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n

Kh\u00e1i ni\u1ec7m kh\u00f4i ph\u1ee5c DNS l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c Daniel B. Jackson \u0111\u01b0a ra trong lu\u1eadn \u00e1n Th\u1ea1c s\u0129 c\u1ee7a \u00f4ng v\u00e0o n\u0103m 2005. Tuy nhi\u00ean, cu\u1ed9c t\u1ea5n c\u00f4ng \u0111\u00e3 thu h\u00fat \u0111\u01b0\u1ee3c s\u1ef1 ch\u00fa \u00fd \u0111\u00e1ng k\u1ec3 sau khi c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u ph\u00e1t hi\u1ec7n ra c\u00e1c tri\u1ec3n khai th\u1ef1c t\u1ebf \u0111\u1ec3 khai th\u00e1c tr\u00ecnh duy\u1ec7t web v\u00e0o n\u0103m 2007. Jeremiah Grossman, m\u1ed9t chuy\u00ean gia b\u1ea3o m\u1eadt \u1ee9ng d\u1ee5ng web, \u0111\u00e3 xu\u1ea5t b\u1ea3n m\u1ed9t b\u00e1o c\u00e1o b\u00e0i \u0111\u0103ng tr\u00ean blog v\u00e0o n\u0103m 2007 m\u00f4 t\u1ea3 c\u00e1ch s\u1eed d\u1ee5ng t\u00ednh n\u0103ng kh\u00f4i ph\u1ee5c DNS \u0111\u1ec3 v\u01b0\u1ee3t qua SOP v\u00e0 x\u00e2m ph\u1ea1m c\u00e1c thi\u1ebft b\u1ecb n\u1ed1i m\u1ea1ng \u0111\u1eb1ng sau t\u01b0\u1eddng l\u1eeda c\u1ee7a n\u1ea1n nh\u00e2n. K\u1ec3 t\u1eeb \u0111\u00f3, vi\u1ec7c kh\u00f4i ph\u1ee5c DNS \u0111\u00e3 tr\u1edf th\u00e0nh ch\u1ee7 \u0111\u1ec1 \u0111\u01b0\u1ee3c c\u1ea3 k\u1ebb t\u1ea5n c\u00f4ng v\u00e0 ng\u01b0\u1eddi b\u1ea3o v\u1ec7 quan t\u00e2m.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS<\/h2>\n

Cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS bao g\u1ed3m m\u1ed9t quy tr\u00ecnh g\u1ed3m nhi\u1ec1u b\u01b0\u1edbc, trong \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng l\u1eeba tr\u00ecnh duy\u1ec7t web c\u1ee7a n\u1ea1n nh\u00e2n th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u ngo\u00e0i \u00fd mu\u1ed1n \u0111\u1ed1i v\u1edbi c\u00e1c mi\u1ec1n t\u00f9y \u00fd. Cu\u1ed9c t\u1ea5n c\u00f4ng th\u01b0\u1eddng tu\u00e2n theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n

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    Quy\u1ec1n truy c\u1eadp ban \u0111\u1ea7u<\/strong>: N\u1ea1n nh\u00e2n truy c\u1eadp m\u1ed9t trang web \u0111\u1ed9c h\u1ea1i ho\u1eb7c b\u1ecb d\u1ee5 d\u1ed7 nh\u1ea5p v\u00e0o li\u00ean k\u1ebft \u0111\u1ed9c h\u1ea1i.<\/p>\n<\/li>\n

  2. \n

    \u0110\u1ed9 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n<\/strong>: Tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n g\u1eedi y\u00eau c\u1ea7u DNS \u0111\u1ec3 ph\u00e2n gi\u1ea3i mi\u1ec1n li\u00ean k\u1ebft v\u1edbi trang web \u0111\u1ed9c h\u1ea1i.<\/p>\n<\/li>\n

  3. \n

    Ph\u1ea3n h\u1ed3i h\u1ee3p ph\u00e1p ng\u1eafn h\u1ea1n<\/strong>: Ban \u0111\u1ea7u, ph\u1ea3n h\u1ed3i DNS ch\u1ee9a \u0111\u1ecba ch\u1ec9 IP tr\u1ecf \u0111\u1ebfn m\u00e1y ch\u1ee7 c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng. Tuy nhi\u00ean, \u0111\u1ecba ch\u1ec9 IP n\u00e0y nhanh ch\u00f3ng \u0111\u01b0\u1ee3c thay \u0111\u1ed5i th\u00e0nh IP h\u1ee3p ph\u00e1p, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u1ecba ch\u1ec9 IP c\u1ee7a b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn ho\u1eb7c m\u00e1y ch\u1ee7 n\u1ed9i b\u1ed9.<\/p>\n<\/li>\n

  4. \n

    B\u1ecf qua ch\u00ednh s\u00e1ch c\u00f9ng ngu\u1ed3n g\u1ed1c<\/strong>: Do TTL (Th\u1eddi gian t\u1ed3n t\u1ea1i) ng\u1eafn c\u1ee7a ph\u1ea3n h\u1ed3i DNS, tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n coi ngu\u1ed3n g\u1ed1c \u0111\u1ed9c h\u1ea1i v\u00e0 ngu\u1ed3n g\u1ed1c h\u1ee3p ph\u00e1p l\u00e0 nh\u01b0 nhau.<\/p>\n<\/li>\n

  5. \n

    Khai th\u00e1c<\/strong>: M\u00e3 JavaScript c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng hi\u1ec7n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u c\u00f3 ngu\u1ed3n g\u1ed1c ch\u00e9o t\u1edbi mi\u1ec1n h\u1ee3p ph\u00e1p, khai th\u00e1c l\u1ed7 h\u1ed5ng trong c\u00e1c thi\u1ebft b\u1ecb v\u00e0 d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 truy c\u1eadp t\u1eeb mi\u1ec1n \u0111\u00f3.<\/p>\n<\/li>\n<\/ol>\n

    C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS<\/h2>\n

    \u0110\u1ec3 hi\u1ec3u c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i ki\u1ec3m tra c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c nhau c\u00f3 li\u00ean quan:<\/p>\n

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      Trang web \u0111\u1ed9c h\u1ea1i<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng l\u01b0u tr\u1eef m\u1ed9t trang web c\u00f3 m\u00e3 JavaScript \u0111\u1ed9c h\u1ea1i.<\/p>\n<\/li>\n

    2. \n

      M\u00e1y ch\u1ee7 DNS<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng ki\u1ec3m so\u00e1t m\u00e1y ch\u1ee7 DNS ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n DNS \u0111\u1ed1i v\u1edbi mi\u1ec1n \u0111\u1ed9c h\u1ea1i.<\/p>\n<\/li>\n

    3. \n

      Thao t\u00e1c TTL<\/strong>: M\u00e1y ch\u1ee7 DNS ban \u0111\u1ea7u ph\u1ea3n h\u1ed3i b\u1eb1ng m\u1ed9t gi\u00e1 tr\u1ecb TTL ng\u1eafn, khi\u1ebfn tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n l\u01b0u tr\u1eef ph\u1ea3n h\u1ed3i DNS trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn.<\/p>\n<\/li>\n

    4. \n

      M\u1ee5c ti\u00eau h\u1ee3p ph\u00e1p<\/strong>: M\u00e1y ch\u1ee7 DNS c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng sau \u0111\u00f3 s\u1ebd ph\u1ea3n h\u1ed3i b\u1eb1ng m\u1ed9t \u0111\u1ecba ch\u1ec9 IP kh\u00e1c, tr\u1ecf \u0111\u1ebfn m\u1ed9t m\u1ee5c ti\u00eau h\u1ee3p ph\u00e1p (v\u00ed d\u1ee5: t\u00e0i nguy\u00ean m\u1ea1ng n\u1ed9i b\u1ed9).<\/p>\n<\/li>\n

    5. \n

      B\u1ecf qua ch\u00ednh s\u00e1ch c\u00f9ng ngu\u1ed3n g\u1ed1c<\/strong>: Do TTL ng\u1eafn, tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n coi mi\u1ec1n \u0111\u1ed9c h\u1ea1i v\u00e0 m\u1ee5c ti\u00eau h\u1ee3p ph\u00e1p l\u00e0 c\u00f3 c\u00f9ng ngu\u1ed3n g\u1ed1c, cho ph\u00e9p c\u00e1c y\u00eau c\u1ea7u c\u00f3 ngu\u1ed3n g\u1ed1c ch\u00e9o.<\/p>\n<\/li>\n<\/ol>\n

      Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS<\/h2>\n

      Cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS th\u1ec3 hi\u1ec7n m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng ch\u00ednh khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed1i \u0111e d\u1ecda ti\u1ec1m t\u00e0ng:<\/p>\n

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        s\u1ef1 t\u00e0ng h\u00ecnh<\/strong>: V\u00ec cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eadn d\u1ee5ng tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n v\u00e0 c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng DNS n\u00ean n\u00f3 c\u00f3 th\u1ec3 tr\u1ed1n tr\u00e1nh c\u00e1c bi\u1ec7n ph\u00e1p an ninh m\u1ea1ng truy\u1ec1n th\u1ed1ng.<\/p>\n<\/li>\n

      2. \n

        Khai th\u00e1c ch\u00e9o ngu\u1ed3n g\u1ed1c<\/strong>: N\u00f3 cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng v\u01b0\u1ee3t qua SOP, cho ph\u00e9p ch\u00fang t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ho\u1eb7c d\u1ecbch v\u1ee5 n\u1ed1i m\u1ea1ng m\u00e0 l\u1ebd ra kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c t\u1eeb web.<\/p>\n<\/li>\n

      3. \n

        Kho\u1ea3ng th\u1eddi gian ng\u1eafn<\/strong>: Cu\u1ed9c t\u1ea5n c\u00f4ng d\u1ef1a v\u00e0o gi\u00e1 tr\u1ecb TTL ng\u1eafn \u0111\u1ec3 nhanh ch\u00f3ng chuy\u1ec3n \u0111\u1ed5i gi\u1eefa \u0111\u1ecba ch\u1ec9 IP \u0111\u1ed9c h\u1ea1i v\u00e0 h\u1ee3p ph\u00e1p, khi\u1ebfn vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 gi\u1ea3m thi\u1ec3u tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/p>\n<\/li>\n

      4. \n

        Khai th\u00e1c thi\u1ebft b\u1ecb<\/strong>: Vi\u1ec7c kh\u00f4i ph\u1ee5c DNS th\u01b0\u1eddng nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u00e1c thi\u1ebft b\u1ecb IoT v\u00e0 thi\u1ebft b\u1ecb n\u1ed1i m\u1ea1ng c\u00f3 th\u1ec3 c\u00f3 l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt, bi\u1ebfn ch\u00fang th\u00e0nh c\u00e1c vect\u01a1 t\u1ea5n c\u00f4ng ti\u1ec1m n\u0103ng.<\/p>\n<\/li>\n

      5. \n

        B\u1ed1i c\u1ea3nh ng\u01b0\u1eddi d\u00f9ng<\/strong>: Cu\u1ed9c t\u1ea5n c\u00f4ng x\u1ea3y ra trong b\u1ed1i c\u1ea3nh tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n, c\u00f3 kh\u1ea3 n\u0103ng cho ph\u00e9p truy c\u1eadp v\u00e0o th\u00f4ng tin nh\u1ea1y c\u1ea3m ho\u1eb7c c\u00e1c phi\u00ean \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c.<\/p>\n<\/li>\n<\/ol>\n

        C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS<\/h2>\n

        C\u00f3 nhi\u1ec1u bi\u1ebfn th\u1ec3 kh\u00e1c nhau c\u1ee7a k\u1ef9 thu\u1eadt t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS, m\u1ed7i k\u1ef9 thu\u1eadt c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m v\u00e0 m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n\n\n\n\n\n
        Ki\u1ec3u<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
        Kh\u00f4i ph\u1ee5c DNS c\u1ed5 \u0111i\u1ec3n<\/strong><\/td>\nM\u00e1y ch\u1ee7 c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng thay \u0111\u1ed5i ph\u1ea3n h\u1ed3i DNS nhi\u1ec1u l\u1ea7n \u0111\u1ec3 truy c\u1eadp v\u00e0o nhi\u1ec1u t\u00e0i nguy\u00ean n\u1ed9i b\u1ed9 kh\u00e1c nhau.<\/td>\n<\/tr>\n
        \u0110\u00f3ng l\u1ea1i b\u1ea3n ghi \u0111\u01a1n A<\/strong><\/td>\nPh\u1ea3n h\u1ed3i DNS ch\u1ec9 ch\u1ee9a m\u1ed9t \u0111\u1ecba ch\u1ec9 IP, \u0111\u1ecba ch\u1ec9 n\u00e0y nhanh ch\u00f3ng \u0111\u01b0\u1ee3c chuy\u1ec3n sang IP n\u1ed9i b\u1ed9 c\u1ee7a m\u1ee5c ti\u00eau.<\/td>\n<\/tr>\n
        Ph\u1ee5c h\u1ed3i m\u00e1y ch\u1ee7 \u1ea3o<\/strong><\/td>\nCu\u1ed9c t\u1ea5n c\u00f4ng khai th\u00e1c c\u00e1c m\u00e1y ch\u1ee7 \u1ea3o tr\u00ean m\u1ed9t \u0111\u1ecba ch\u1ec9 IP duy nh\u1ea5t, nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 kh\u00e1c nhau tr\u00ean c\u00f9ng m\u1ed9t m\u00e1y ch\u1ee7.<\/td>\n<\/tr>\n
        Rebound d\u1ef1a tr\u00ean th\u1eddi gian<\/strong><\/td>\nPh\u1ea3n h\u1ed3i DNS thay \u0111\u1ed5i theo c\u00e1c kho\u1ea3ng th\u1eddi gian c\u1ee5 th\u1ec3, cho ph\u00e9p truy c\u1eadp v\u00e0o c\u00e1c d\u1ecbch v\u1ee5 kh\u00e1c nhau theo th\u1eddi gian.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n

        Cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS \u0111\u1eb7t ra nh\u1eefng th\u00e1ch th\u1ee9c b\u1ea3o m\u1eadt nghi\u00eam tr\u1ecdng v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng ti\u1ec1m n\u0103ng c\u1ee7a n\u00f3 bao g\u1ed3m:<\/p>\n

          \n
        1. \n

          Truy c\u1eadp tr\u00e1i ph\u00e9p<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0 thao t\u00fang c\u00e1c thi\u1ebft b\u1ecb n\u1ed1i m\u1ea1ng n\u1ed9i b\u1ed9, d\u1eabn \u0111\u1ebfn vi ph\u1ea1m d\u1eef li\u1ec7u ho\u1eb7c ki\u1ec3m so\u00e1t tr\u00e1i ph\u00e9p.<\/p>\n<\/li>\n

        2. \n

          N\u00e2ng cao \u0111\u1eb7c quy\u1ec1n<\/strong>: N\u1ebfu m\u1ed9t d\u1ecbch v\u1ee5 n\u1ed9i b\u1ed9 c\u00f3 \u0111\u1eb7c quy\u1ec1n n\u00e2ng cao, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 khai th\u00e1c d\u1ecbch v\u1ee5 \u0111\u00f3 \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp cao h\u01a1n.<\/p>\n<\/li>\n

        3. \n

          Tuy\u1ec3n d\u1ee5ng Botnet<\/strong>: C\u00e1c thi\u1ebft b\u1ecb IoT b\u1ecb x\u00e2m ph\u1ea1m th\u00f4ng qua vi\u1ec7c kh\u00f4i ph\u1ee5c DNS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tuy\u1ec3n d\u1ee5ng v\u00e0o m\u1ea1ng botnet \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c h\u1ea1i kh\u00e1c.<\/p>\n<\/li>\n<\/ol>\n

          \u0110\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn vi\u1ec7c kh\u00f4i ph\u1ee5c DNS, nhi\u1ec1u gi\u1ea3i ph\u00e1p kh\u00e1c nhau \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n

            \n
          1. \n

            X\u00e1c th\u1ef1c ph\u1ea3n h\u1ed3i DNS<\/strong>: Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS v\u00e0 m\u00e1y kh\u00e1ch c\u00f3 th\u1ec3 tri\u1ec3n khai c\u00e1c k\u1ef9 thu\u1eadt x\u00e1c th\u1ef1c ph\u1ea3n h\u1ed3i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ph\u1ea3n h\u1ed3i DNS l\u00e0 h\u1ee3p ph\u00e1p v\u00e0 kh\u00f4ng b\u1ecb gi\u1ea3 m\u1ea1o.<\/p>\n<\/li>\n

          2. \n

            Ch\u00ednh s\u00e1ch c\u00f9ng ngu\u1ed3n g\u1ed1c m\u1edf r\u1ed9ng<\/strong>: Tr\u00ecnh duy\u1ec7t c\u00f3 th\u1ec3 xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 b\u1ed5 sung ngo\u00e0i \u0111\u1ecba ch\u1ec9 IP \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem hai ngu\u1ed3n g\u1ed1c c\u00f3 gi\u1ed1ng nhau hay kh\u00f4ng.<\/p>\n<\/li>\n

          3. \n

            Ph\u00e2n \u0111o\u1ea1n m\u1ea1ng<\/strong>: Vi\u1ec7c ph\u00e2n chia m\u1ea1ng h\u1ee3p l\u00fd c\u00f3 th\u1ec3 h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng c\u00e1c thi\u1ebft b\u1ecb v\u00e0 d\u1ecbch v\u1ee5 b\u00ean trong ti\u1ebfp x\u00fac v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb b\u00ean ngo\u00e0i.<\/p>\n<\/li>\n<\/ol>\n

            C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch<\/h2>\n\n\n\n\n\n\n\n\n\n
            \u0111\u1eb7c tr\u01b0ng<\/th>\nT\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS<\/th>\nT\u1eadp l\u1ec7nh ch\u00e9o trang (XSS)<\/th>\n<\/tr>\n<\/thead>\n
            M\u1ee5c ti\u00eau<\/strong><\/td>\nThi\u1ebft b\u1ecb v\u00e0 d\u1ecbch v\u1ee5 n\u1ed1i m\u1ea1ng<\/td>\n\u1ee8ng d\u1ee5ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng web<\/td>\n<\/tr>\n
            Khai th\u00e1c<\/strong><\/td>\nB\u1ecf qua ch\u00ednh s\u00e1ch c\u00f9ng ngu\u1ed3n g\u1ed1c<\/td>\nCh\u00e8n m\u00e3 v\u00e0 chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n phi\u00ean<\/td>\n<\/tr>\n
            Ngu\u1ed3n g\u1ed1c<\/strong><\/td>\nLi\u00ean quan \u0111\u1ebfn thao t\u00e1c DNS<\/td>\nT\u1ea5n c\u00f4ng tr\u1ef1c ti\u1ebfp v\u00e0o c\u00e1c trang web<\/td>\n<\/tr>\n
            S\u1ef1 va ch\u1ea1m<\/strong><\/td>\nTruy c\u1eadp v\u00e0 ki\u1ec3m so\u00e1t tr\u00e1i ph\u00e9p<\/td>\nTr\u1ed9m c\u1eafp v\u00e0 thao t\u00fang d\u1eef li\u1ec7u<\/td>\n<\/tr>\n
            Ph\u00f2ng ng\u1eeba<\/strong><\/td>\nX\u00e1c th\u1ef1c ph\u1ea3n h\u1ed3i DNS<\/td>\nV\u1ec7 sinh \u0111\u1ea7u v\u00e0o v\u00e0 m\u00e3 h\u00f3a \u0111\u1ea7u ra<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn t\u1ea5n c\u00f4ng DNS rebination<\/h2>\n

            Khi h\u1ec7 sinh th\u00e1i Internet v\u00e0 IoT ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, c\u00e1c m\u1ed1i \u0111e d\u1ecda t\u1eeb c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS c\u0169ng s\u1ebd t\u0103ng theo. Trong t\u01b0\u01a1ng lai, ch\u00fang ta c\u00f3 th\u1ec3 mong \u0111\u1ee3i:<\/p>\n

              \n
            1. \n

              K\u1ef9 thu\u1eadt n\u00e9 tr\u00e1nh n\u00e2ng cao<\/strong>: Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p tinh vi h\u01a1n \u0111\u1ec3 tr\u00e1nh b\u1ecb ph\u00e1t hi\u1ec7n v\u00e0 gi\u1ea3m nh\u1eb9.<\/p>\n<\/li>\n

            2. \n

              C\u1ea3i thi\u1ec7n b\u1ea3o m\u1eadt DNS<\/strong>: C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng v\u00e0 giao th\u1ee9c DNS c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n \u0111\u1ec3 cung c\u1ea5p c\u01a1 ch\u1ebf b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd h\u01a1n tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady.<\/p>\n<\/li>\n

            3. \n

              Ph\u00f2ng th\u1ee7 d\u1ef1a tr\u00ean AI<\/strong>: Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o v\u00e0 H\u1ecdc m\u00e1y s\u1ebd \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS trong th\u1eddi gian th\u1ef1c.<\/p>\n<\/li>\n<\/ol>\n

              C\u00e1ch m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft v\u1edbi cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS<\/h2>\n

              M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng m\u1ed9t vai tr\u00f2 k\u00e9p li\u00ean quan \u0111\u1ebfn c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS. H\u1ecd c\u00f3 th\u1ec3 v\u1eeba l\u00e0 m\u1ee5c ti\u00eau ti\u1ec1m n\u0103ng v\u1eeba l\u00e0 ng\u01b0\u1eddi b\u1ea3o v\u1ec7 c\u00f3 gi\u00e1 tr\u1ecb:<\/p>\n

                \n
              1. \n

                M\u1ee5c ti\u00eau<\/strong>: N\u1ebfu m\u00e1y ch\u1ee7 proxy b\u1ecb \u0111\u1ecbnh c\u1ea5u h\u00ecnh sai ho\u1eb7c c\u00f3 l\u1ed7 h\u1ed5ng, n\u00f3 c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh \u0111i\u1ec3m truy c\u1eadp \u0111\u1ec3 k\u1ebb t\u1ea5n c\u00f4ng th\u1ef1c hi\u1ec7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS nh\u1eb1m v\u00e0o m\u1ea1ng n\u1ed9i b\u1ed9.<\/p>\n<\/li>\n

              2. \n

                H\u1eadu v\u1ec7<\/strong>: M\u1eb7t kh\u00e1c, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 t\u00e0i nguy\u00ean b\u00ean ngo\u00e0i, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 gi\u00fap ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c ph\u1ea3n h\u1ed3i DNS \u0111\u1ed9c h\u1ea1i.<\/p>\n<\/li>\n<\/ol>\n

                \u0110i\u1ec1u quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy, nh\u01b0 OneProxy, l\u00e0 ph\u1ea3i li\u00ean t\u1ee5c theo d\u00f5i v\u00e0 c\u1eadp nh\u1eadt h\u1ec7 th\u1ed1ng c\u1ee7a h\u1ecd \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS.<\/p>\n

                Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n

                \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng kh\u00f4i ph\u1ee5c DNS, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

                  \n
                1. Kh\u00f4i ph\u1ee5c DNS c\u1ee7a Dan Kaminsky<\/a><\/li>\n
                2. T\u00ecm hi\u1ec3u v\u1ec1 vi\u1ec7c kh\u00f4i ph\u1ee5c DNS c\u1ee7a \u0110\u1ea1i h\u1ecdc Stanford<\/a><\/li>\n
                3. Ph\u00e1t hi\u1ec7n vi\u1ec7c kh\u00f4i ph\u1ee5c DNS b\u1eb1ng tr\u00ecnh duy\u1ec7t RASP<\/a><\/li>\n<\/ol>\n

                  H\u00e3y nh\u1edb r\u1eb1ng, vi\u1ec7c lu\u00f4n c\u1eadp nh\u1eadt v\u1ec1 c\u00e1c k\u1ef9 thu\u1eadt t\u1ea5n c\u00f4ng m\u1edbi nh\u1ea5t v\u00e0 \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt t\u1ed1t nh\u1ea5t l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi vi\u1ec7c kh\u00f4i ph\u1ee5c DNS v\u00e0 c\u00e1c m\u1ed1i \u0111e d\u1ecda m\u1edbi n\u1ed5i kh\u00e1c.<\/p>","protected":false},"featured_media":476922,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476921","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about DNS Rebinding Attack: An In-Depth Exploration<\/mark>","faq_items":[{"question":"What is DNS rebinding attack?","answer":"

                  DNS rebinding attack is a sophisticated method used by malicious actors to exploit web browsers and their security mechanisms. It leverages the inherent trust in DNS (Domain Name System) to bypass the Same-Origin Policy (SOP) enforced by web browsers. This attack can be used to target users visiting websites that interact with network services, such as routers, cameras, printers, or even internal corporate systems. By manipulating DNS responses, attackers can gain unauthorized access to sensitive information, execute arbitrary code, or carry out other malicious actions.<\/p>"},{"question":"How did DNS rebinding attack originate?","answer":"

                  The concept of DNS rebinding was first introduced by Daniel B. Jackson in his Master's thesis in 2005. However, it gained significant attention after Jeremiah Grossman's blog post in 2007, describing practical implementations to exploit web browsers and devices behind a victim's firewall.<\/p>"},{"question":"How does DNS rebinding attack work?","answer":"

                  DNS rebinding attack involves a multi-step process where attackers trick victims' web browsers into making unintended requests to arbitrary domains. The attack generally follows these steps:<\/p>

                  1. Initial Access: The victim visits a malicious website or clicks on a malicious link.<\/li>
                  2. Domain Resolution: The victim's browser sends a DNS request to resolve the domain associated with the malicious website.<\/li>
                  3. Short-lived Legitimate Response: The DNS response contains an IP address pointing to the attacker's server initially but quickly changes to a legitimate IP, such as that of a router or an internal server.<\/li>
                  4. Same-Origin Policy Bypass: Due to the short TTL of the DNS response, the victim's browser considers the malicious origin and the legitimate origin as the same.<\/li>
                  5. Exploitation: The attacker's JavaScript code can now make cross-origin requests to the legitimate domain, exploiting vulnerabilities in devices and services accessible from that domain.<\/li><\/ol>"},{"question":"What are the key features of DNS rebinding attack?","answer":"

                    DNS rebinding attack exhibits several key features that make it a potent threat:<\/p>

                    1. Stealthiness: It can evade traditional network security measures by leveraging the victim's browser and the DNS infrastructure.<\/li>
                    2. Cross-Origin Exploitation: Attackers can bypass SOP, enabling them to interact with networked devices or services that should be inaccessible from the web.<\/li>
                    3. Short Time Window: The attack relies on the short TTL value to quickly switch between the malicious and legitimate IP addresses, making detection and mitigation challenging.<\/li>
                    4. Device Exploitation: DNS rebinding often targets IoT devices and networked equipment that may have security vulnerabilities, turning them into potential attack vectors.<\/li>
                    5. User Context: The attack occurs in the context of the victim's browser, potentially allowing access to sensitive information or authenticated sessions.<\/li><\/ol>"},{"question":"What types of DNS rebinding attack exist?","answer":"

                      There are different variations of DNS rebinding attack techniques, each with specific characteristics and goals. Some common types include:<\/p>