{"id":476483,"date":"2023-08-09T07:29:55","date_gmt":"2023-08-09T07:29:55","guid":{"rendered":""},"modified":"2023-09-05T11:12:51","modified_gmt":"2023-09-05T11:12:51","slug":"cross-site-scripting-xss","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/cross-site-scripting-xss\/","title":{"rendered":"K\u1ecbch b\u1ea3n ch\u00e9o trang (XSS)"},"content":{"rendered":"

T\u1eadp l\u1ec7nh ch\u00e9o trang (XSS) l\u00e0 m\u1ed9t lo\u1ea1i l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt th\u01b0\u1eddng th\u1ea5y trong c\u00e1c \u1ee9ng d\u1ee5ng web cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng \u0111\u01b0a c\u00e1c t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i v\u00e0o c\u00e1c trang web \u0111\u01b0\u1ee3c ng\u01b0\u1eddi d\u00f9ng kh\u00e1c xem. C\u00e1c t\u1eadp l\u1ec7nh n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c th\u1ef1c thi b\u1edfi tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u00e0 kh\u00f4ng nghi ng\u1edd, d\u1eabn \u0111\u1ebfn truy c\u1eadp tr\u00e1i ph\u00e9p, \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u ho\u1eb7c c\u00e1c h\u00e0nh \u0111\u1ed9ng c\u00f3 h\u1ea1i kh\u00e1c. XSS \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t trong nh\u1eefng l\u1ed7i b\u1ea3o m\u1eadt \u1ee9ng d\u1ee5ng web ph\u1ed5 bi\u1ebfn v\u00e0 nguy hi\u1ec3m nh\u1ea5t, g\u00e2y ra r\u1ee7i ro \u0111\u00e1ng k\u1ec3 cho ng\u01b0\u1eddi d\u00f9ng c\u0169ng nh\u01b0 ch\u1ee7 s\u1edf h\u1eefu trang web.<\/p>\n

L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a Cross-site scripting (XSS) v\u00e0 nh\u1eefng l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n

Kh\u00e1i ni\u1ec7m Cross-site scripting (XSS) c\u00f3 t\u1eeb gi\u1eefa nh\u1eefng n\u0103m 1990 khi web v\u1eabn c\u00f2n \u1edf giai \u0111o\u1ea1n s\u01a1 khai. L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn l\u1ed7 h\u1ed5ng n\u00e0y c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb danh s\u00e1ch g\u1eedi th\u01b0 b\u1ea3o m\u1eadt v\u00e0o n\u0103m 1996, trong \u0111\u00f3 RSnake n\u00eau b\u1eadt nh\u1eefng r\u1ee7i ro khi cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng g\u1eedi th\u00f4ng tin \u0111\u1ea7u v\u00e0o ch\u01b0a \u0111\u01b0\u1ee3c l\u1ecdc t\u1edbi c\u00e1c trang web, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c th\u1ef1c thi m\u00e3 \u0111\u1ed9c tr\u00ean tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 Cross-site scripting (XSS). M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 Cross-site scripting (XSS)<\/h2>\n

T\u1eadp l\u1ec7nh ch\u00e9o trang x\u1ea3y ra khi m\u1ed9t \u1ee9ng d\u1ee5ng web kh\u00f4ng v\u1ec7 sinh v\u00e0 x\u00e1c th\u1ef1c \u0111\u00fang c\u00e1ch th\u00f4ng tin \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n c\u00e1c t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i v\u00e0o c\u00e1c trang web \u0111\u01b0\u1ee3c ng\u01b0\u1eddi d\u00f9ng kh\u00e1c xem. C\u00f3 ba lo\u1ea1i t\u1ea5n c\u00f4ng XSS ch\u00ednh:<\/p>\n

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    XSS \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef:<\/strong> Trong ki\u1ec3u t\u1ea5n c\u00f4ng n\u00e0y, t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u0129nh vi\u1ec5n tr\u00ean m\u00e1y ch\u1ee7 m\u1ee5c ti\u00eau, th\u01b0\u1eddng l\u00e0 trong c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 \u0111\u01b0\u1ee3c cung c\u1ea5p cho ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp trang web b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/p>\n<\/li>\n

  2. \n

    XSS \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh:<\/strong> \u1ede \u0111\u00e2y, t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i \u0111\u01b0\u1ee3c nh\u00fang v\u00e0o URL ho\u1eb7c \u0111\u1ea7u v\u00e0o kh\u00e1c v\u00e0 \u1ee9ng d\u1ee5ng web s\u1ebd ph\u1ea3n \u00e1nh t\u1eadp l\u1ec7nh \u0111\u00f3 tr\u1edf l\u1ea1i ng\u01b0\u1eddi d\u00f9ng m\u00e0 kh\u00f4ng c\u1ea7n x\u00e1c th\u1ef1c h\u1ee3p l\u1ec7. N\u1ea1n nh\u00e2n v\u00f4 t\u00ecnh th\u1ef1c thi t\u1eadp l\u1ec7nh khi nh\u1ea5n v\u00e0o li\u00ean k\u1ebft b\u1ecb thao t\u00fang.<\/p>\n<\/li>\n

  3. \n

    XSS d\u1ef1a tr\u00ean DOM:<\/strong> Ki\u1ec3u t\u1ea5n c\u00f4ng XSS n\u00e0y thao t\u00fang M\u00f4 h\u00ecnh \u0111\u1ed1i t\u01b0\u1ee3ng t\u00e0i li\u1ec7u (DOM) c\u1ee7a trang web. T\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i kh\u00f4ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u1ef1c ti\u1ebfp tr\u00ean m\u00e1y ch\u1ee7 ho\u1eb7c \u0111\u01b0\u1ee3c ph\u1ea3n \u00e1nh t\u1eeb \u1ee9ng d\u1ee5ng; thay v\u00e0o \u0111\u00f3, n\u00f3 \u0111\u01b0\u1ee3c th\u1ef1c thi trong tr\u00ecnh duy\u1ec7t c\u1ee7a n\u1ea1n nh\u00e2n do t\u1eadp l\u1ec7nh ph\u00eda m\u00e1y kh\u00e1ch b\u1ecb l\u1ed7i.<\/p>\n<\/li>\n<\/ol>\n

    C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a Cross-site scripting (XSS). C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Cross-site scripting (XSS)<\/h2>\n

    \u0110\u1ec3 hi\u1ec3u c\u00e1ch XSS ho\u1ea1t \u0111\u1ed9ng, h\u00e3y ph\u00e2n t\u00edch c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng XSS \u0111i\u1ec3n h\u00ecnh:<\/p>\n

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      \u0110i\u1ec3m ti\u00eam ph\u00f2ng:<\/strong> Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng trong \u1ee9ng d\u1ee5ng web m\u1ee5c ti\u00eau, n\u01a1i \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c ho\u1eb7c v\u1ec7 sinh \u0111\u00fang c\u00e1ch. C\u00e1c \u0111i\u1ec3m ch\u00e8n ph\u1ed5 bi\u1ebfn bao g\u1ed3m c\u00e1c tr\u01b0\u1eddng \u0111\u1ea7u v\u00e0o, URL v\u00e0 ti\u00eau \u0111\u1ec1 HTTP.<\/p>\n<\/li>\n

    2. \n

      T\u1ea3i tr\u1ecdng \u0111\u1ed9c h\u1ea1i:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng t\u1ea1o ra m\u1ed9t t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i, th\u01b0\u1eddng b\u1eb1ng JavaScript, th\u1ef1c hi\u1ec7n h\u00e0nh \u0111\u1ed9ng \u0111\u1ed9c h\u1ea1i mong mu\u1ed1n, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u00e1nh c\u1eafp cookie phi\u00ean ho\u1eb7c chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang web l\u1eeba \u0111\u1ea3o.<\/p>\n<\/li>\n

    3. \n

      Ch\u1ea5p h\u00e0nh:<\/strong> T\u1eadp l\u1ec7nh \u0111\u01b0\u1ee3c t\u1ea1o sau \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o \u1ee9ng d\u1ee5ng d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng th\u00f4ng qua \u0111i\u1ec3m ti\u00eam.<\/p>\n<\/li>\n

    4. \n

      T\u01b0\u01a1ng t\u00e1c ng\u01b0\u1eddi d\u00f9ng:<\/strong> Khi ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng nghi ng\u1edd t\u01b0\u01a1ng t\u00e1c v\u1edbi trang web b\u1ecb x\u00e2m nh\u1eadp, t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi trong tr\u00ecnh duy\u1ec7t c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n

    5. \n

      M\u1ee5c ti\u00eau c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng:<\/strong> M\u1ee5c ti\u00eau c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng, t\u00f9y thu\u1ed9c v\u00e0o b\u1ea3n ch\u1ea5t c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng, c\u00f3 th\u1ec3 bao g\u1ed3m \u0111\u00e1nh c\u1eafp th\u00f4ng tin nh\u1ea1y c\u1ea3m, chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n phi\u00ean c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, ph\u00e1t t\u00e1n ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i ho\u1eb7c x\u00f3a giao di\u1ec7n trang web.<\/p>\n<\/li>\n<\/ol>\n

      Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Cross-site scripting (XSS)<\/h2>\n

      C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a Cross-site scripting bao g\u1ed3m:<\/p>\n

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        Khai th\u00e1c ph\u00eda kh\u00e1ch h\u00e0ng:<\/strong> C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS ch\u1ee7 y\u1ebfu nh\u1eafm v\u00e0o ph\u00eda m\u00e1y kh\u00e1ch, l\u1ee3i d\u1ee5ng tr\u00ecnh duy\u1ec7t web c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 th\u1ef1c thi c\u00e1c t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i.<\/p>\n<\/li>\n

      2. \n

        C\u00e1c vect\u01a1 khai th\u00e1c \u0111a d\u1ea1ng:<\/strong> XSS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c thi th\u00f4ng qua nhi\u1ec1u vect\u01a1 kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 bi\u1ec3u m\u1eabu, thanh t\u00ecm ki\u1ebfm, ph\u1ea7n nh\u1eadn x\u00e9t v\u00e0 URL.<\/p>\n<\/li>\n

      3. \n

        M\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng:<\/strong> T\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS c\u00f3 th\u1ec3 dao \u0111\u1ed9ng t\u1eeb c\u00e1c c\u1eeda s\u1ed5 b\u1eadt l\u00ean g\u00e2y kh\u00f3 ch\u1ecbu \u1edf m\u1ee9c \u0111\u1ed9 nh\u1eb9 \u0111\u1ebfn c\u00e1c h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng nh\u01b0 vi ph\u1ea1m d\u1eef li\u1ec7u v\u00e0 t\u1ed5n th\u1ea5t t\u00e0i ch\u00ednh.<\/p>\n<\/li>\n

      4. \n

        S\u1ef1 ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ef1 tin c\u1eady c\u1ee7a ng\u01b0\u1eddi d\u00f9ng:<\/strong> XSS th\u01b0\u1eddng khai th\u00e1c l\u00f2ng tin c\u1ee7a ng\u01b0\u1eddi d\u00f9ng tr\u00ean c\u00e1c trang web h\u1ecd truy c\u1eadp, v\u00ec t\u1eadp l\u1ec7nh \u0111\u01b0\u1ee3c ch\u00e8n d\u01b0\u1eddng nh\u01b0 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb m\u1ed9t ngu\u1ed3n h\u1ee3p ph\u00e1p.<\/p>\n<\/li>\n

      5. \n

        L\u1ed7 h\u1ed5ng d\u1ef1a tr\u00ean ng\u1eef c\u1ea3nh:<\/strong> C\u00e1c ng\u1eef c\u1ea3nh kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 HTML, JavaScript v\u00e0 CSS, c\u00f3 c\u00e1c y\u00eau c\u1ea7u tho\u00e1t duy nh\u1ea5t, khi\u1ebfn vi\u1ec7c x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o ph\u00f9 h\u1ee3p tr\u1edf n\u00ean quan tr\u1ecdng.<\/p>\n<\/li>\n<\/ol>\n

        C\u00e1c lo\u1ea1i k\u1ecbch b\u1ea3n ch\u00e9o trang (XSS)<\/h2>\n

        C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS \u0111\u01b0\u1ee3c ph\u00e2n th\u00e0nh ba lo\u1ea1i d\u1ef1a tr\u00ean ph\u01b0\u01a1ng th\u1ee9c th\u1ef1c hi\u1ec7n v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang:<\/p>\n\n\n\n\n\n\n\n
        Ki\u1ec3u<\/strong><\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/strong><\/th>\n<\/tr>\n<\/thead>\n
        XSS \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef<\/td>\nT\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean m\u00e1y ch\u1ee7 v\u00e0 \u0111\u01b0\u1ee3c cung c\u1ea5p cho ng\u01b0\u1eddi d\u00f9ng t\u1eeb trang web b\u1ecb x\u00e2m nh\u1eadp.<\/td>\n<\/tr>\n
        XSS ph\u1ea3n \u00e1nh<\/td>\nT\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i \u0111\u01b0\u1ee3c nh\u00fang v\u00e0o URL ho\u1eb7c \u0111\u1ea7u v\u00e0o kh\u00e1c, ph\u1ea3n \u00e1nh l\u1ea1i cho ng\u01b0\u1eddi d\u00f9ng.<\/td>\n<\/tr>\n
        XSS d\u1ef1a tr\u00ean DOM<\/td>\nCu\u1ed9c t\u1ea5n c\u00f4ng thao t\u00fang DOM c\u1ee7a trang web, th\u1ef1c thi t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i trong tr\u00ecnh duy\u1ec7t.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng Cross-site scripting (XSS), 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

        Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng XSS cho nhi\u1ec1u m\u1ee5c \u0111\u00edch \u0111\u1ed9c h\u1ea1i kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n

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          Chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n phi\u00ean:<\/strong> B\u1eb1ng c\u00e1ch \u0111\u00e1nh c\u1eafp cookie phi\u00ean, k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 m\u1ea1o danh ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p v\u00e0 gi\u00e0nh \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp tr\u00e1i ph\u00e9p.<\/p>\n<\/li>\n

        2. \n

          T\u1ea5n c\u00f4ng l\u1eeba \u0111\u1ea3o:<\/strong> XSS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang l\u1eeba \u0111\u1ea3o, l\u1eeba h\u1ecd ti\u1ebft l\u1ed9 th\u00f4ng tin nh\u1ea1y c\u1ea3m.<\/p>\n<\/li>\n

        3. \n

          Ghi nh\u1eadt k\u00fd b\u00e0n ph\u00edm:<\/strong> C\u00e1c t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i c\u00f3 th\u1ec3 ghi l\u1ea1i thao t\u00e1c g\u00f5 ph\u00edm c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, thu th\u1eadp d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m.<\/p>\n<\/li>\n

        4. \n

          L\u00e0m bi\u1ebfn d\u1ea1ng:<\/strong> Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eeda \u0111\u1ed5i n\u1ed9i dung trang web \u0111\u1ec3 truy\u1ec1n b\u00e1 th\u00f4ng tin sai l\u1ec7ch ho\u1eb7c g\u00e2y t\u1ed5n h\u1ea1i \u0111\u1ebfn danh ti\u1ebfng c\u1ee7a c\u00f4ng ty.<\/p>\n<\/li>\n

        5. \n

          Ph\u00e2n ph\u1ed1i ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i:<\/strong> XSS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n ph\u1ed1i ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i cho ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng nghi ng\u1edd.<\/p>\n<\/li>\n<\/ol>\n

          \u0110\u1ec3 gi\u1ea3m thi\u1ec3u l\u1ed7 h\u1ed5ng XSS, nh\u00e0 ph\u00e1t tri\u1ec3n web n\u00ean th\u1ef1c hi\u1ec7n theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t:<\/p>\n

            \n
          1. \n

            X\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o:<\/strong> D\u1ecdn d\u1eb9p v\u00e0 x\u00e1c th\u1ef1c t\u1ea5t c\u1ea3 th\u00f4ng tin \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c ch\u00e8n t\u1eadp l\u1ec7nh.<\/p>\n<\/li>\n

          2. \n

            M\u00e3 h\u00f3a \u0111\u1ea7u ra:<\/strong> M\u00e3 h\u00f3a n\u1ed9i dung \u0111\u1ed9ng tr\u01b0\u1edbc khi hi\u1ec3n th\u1ecb \u0111\u1ec3 ng\u0103n vi\u1ec7c th\u1ef1c thi t\u1eadp l\u1ec7nh.<\/p>\n<\/li>\n

          3. \n

            Cookie ch\u1ec9 HTTP:<\/strong> S\u1eed d\u1ee5ng cookie ch\u1ec9 HTTP \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n phi\u00ean.<\/p>\n<\/li>\n

          4. \n

            Ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt n\u1ed9i dung (CSP):<\/strong> Tri\u1ec3n khai c\u00e1c ti\u00eau \u0111\u1ec1 CSP \u0111\u1ec3 h\u1ea1n ch\u1ebf ngu\u1ed3n c\u1ee7a c\u00e1c t\u1eadp l\u1ec7nh th\u1ef1c thi.<\/p>\n<\/li>\n

          5. \n

            Th\u1ef1c ti\u1ec5n ph\u00e1t tri\u1ec3n an to\u00e0n:<\/strong> H\u01b0\u1edbng d\u1eabn c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u1ec1 c\u00e1ch th\u1ef1c h\u00e0nh m\u00e3 h\u00f3a an to\u00e0n v\u00e0 ti\u1ebfn h\u00e0nh ki\u1ec3m tra b\u1ea3o m\u1eadt th\u01b0\u1eddng xuy\u00ean.<\/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
            \u0110\u1eb7c tr\u01b0ng<\/strong><\/th>\nT\u1eadp l\u1ec7nh ch\u00e9o trang (XSS)<\/strong><\/th>\nGi\u1ea3 m\u1ea1o y\u00eau c\u1ea7u tr\u00ean nhi\u1ec1u trang web (CSRF)<\/strong><\/th>\nTi\u00eam SQL<\/strong><\/th>\n<\/tr>\n<\/thead>\n
            Ki\u1ec3u t\u1ea5n c\u00f4ng<\/td>\nKhai th\u00e1c ph\u00eda kh\u00e1ch h\u00e0ng<\/td>\nKhai th\u00e1c ph\u00eda m\u00e1y ch\u1ee7<\/td>\nKhai th\u00e1c ph\u00eda m\u00e1y ch\u1ee7<\/td>\n<\/tr>\n
            M\u1ee5c ti\u00eau ch\u00ednh<\/td>\nTr\u00ecnh duy\u1ec7t web c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/td>\nY\u00eau c\u1ea7u thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i c\u1ee7a \u1ee9ng d\u1ee5ng web<\/td>\nC\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a \u1ee9ng d\u1ee5ng web<\/td>\n<\/tr>\n
            L\u1ed7 h\u1ed5ng b\u1ecb khai th\u00e1c<\/td>\nX\u1eed l\u00fd \u0111\u1ea7u v\u00e0o kh\u00f4ng \u0111\u00fang c\u00e1ch<\/td>\nThi\u1ebfu m\u00e3 th\u00f4ng b\u00e1o CSRF<\/td>\nX\u1eed l\u00fd \u0111\u1ea7u v\u00e0o kh\u00f4ng \u0111\u00fang c\u00e1ch<\/td>\n<\/tr>\n
            M\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng c\u1ee7a t\u00e1c \u0111\u1ed9ng<\/td>\nPh\u1ea1m vi t\u1eeb nh\u1eb9 \u0111\u1ebfn n\u1eb7ng<\/td>\nHo\u1ea1t \u0111\u1ed9ng giao d\u1ecbch<\/td>\nTi\u1ebft l\u1ed9 d\u1eef li\u1ec7u tr\u00e1i ph\u00e9p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

            C\u00e1c quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn Cross-site scripting (XSS)<\/h2>\n

            T\u01b0\u01a1ng lai c\u1ee7a vi\u1ec7c ng\u0103n ch\u1eb7n XSS n\u1eb1m \u1edf nh\u1eefng ti\u1ebfn b\u1ed9 trong b\u1ea3o m\u1eadt \u1ee9ng d\u1ee5ng web v\u00e0 vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e1t tri\u1ec3n an to\u00e0n. Nh\u1eefng ph\u00e1t tri\u1ec3n ti\u1ec1m n\u0103ng c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\n

              \n
            1. \n

              X\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o n\u00e2ng cao:<\/strong> C\u00e1c c\u00f4ng c\u1ee5 v\u00e0 khung t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c l\u1ed7 h\u1ed5ng XSS t\u1ed1t h\u01a1n.<\/p>\n<\/li>\n

            2. \n

              Ph\u00f2ng th\u1ee7 d\u1ef1a tr\u00ean AI:<\/strong> Tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o \u0111\u1ec3 ch\u1ee7 \u0111\u1ed9ng x\u00e1c \u0111\u1ecbnh v\u00e0 gi\u1ea3m thi\u1ec3u c\u00e1c m\u1ed1i \u0111e d\u1ecda XSS zero-day.<\/p>\n<\/li>\n

            3. \n

              C\u1ea3i ti\u1ebfn tr\u00ecnh duy\u1ec7t web:<\/strong> C\u1ea3i thi\u1ec7n t\u00ednh n\u0103ng b\u1ea3o m\u1eadt tr\u00ecnh duy\u1ec7t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro XSS.<\/p>\n<\/li>\n

            4. \n

              \u0110\u00e0o t\u1ea1o An ninh:<\/strong> \u0110\u00e0o t\u1ea1o b\u1ea3o m\u1eadt s\u00e2u r\u1ed9ng h\u01a1n cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n \u0111\u1ec3 th\u1ea5m nhu\u1ea7n t\u01b0 duy b\u1ea3o m\u1eadt l\u00e0 tr\u00ean h\u1ebft.<\/p>\n<\/li>\n<\/ol>\n

              C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi T\u1eadp l\u1ec7nh ch\u00e9o trang (XSS)<\/h2>\n

              M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c gi\u1ea3m thi\u1ec3u r\u1ee7i ro XSS. B\u1eb1ng c\u00e1ch \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 web, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt b\u1ed5 sung, bao g\u1ed3m:<\/p>\n

                \n
              1. \n

                L\u1ecdc n\u1ed9i dung:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 qu\u00e9t l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp web \u0111\u1ec3 t\u00ecm c\u00e1c t\u1eadp l\u1ec7nh \u0111\u1ed9c h\u1ea1i v\u00e0 ch\u1eb7n ch\u00fang tr\u01b0\u1edbc khi ti\u1ebfp c\u1eadn tr\u00ecnh duy\u1ec7t c\u1ee7a kh\u00e1ch h\u00e0ng.<\/p>\n<\/li>\n

              2. \n

                Ki\u1ec3m tra SSL\/TLS:<\/strong> Proxy c\u00f3 th\u1ec3 ki\u1ec3m tra l\u01b0u l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a \u0111\u1ec3 t\u00ecm c\u00e1c m\u1ed1i \u0111e d\u1ecda ti\u1ec1m \u1ea9n, ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eadn d\u1ee5ng c\u00e1c k\u00eanh \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a.<\/p>\n<\/li>\n

              3. \n

                Y\u00eau c\u1ea7u l\u1ecdc:<\/strong> M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ph\u00e2n t\u00edch c\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn v\u00e0 ch\u1eb7n nh\u1eefng y\u00eau c\u1ea7u c\u00f3 v\u1ebb nh\u01b0 l\u00e0 n\u1ed7 l\u1ef1c XSS.<\/p>\n<\/li>\n

              4. \n

                T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web (WAF):<\/strong> Nhi\u1ec1u m\u00e1y ch\u1ee7 proxy k\u1ebft h\u1ee3p WAF \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS d\u1ef1a tr\u00ean c\u00e1c m\u1eabu \u0111\u00e3 bi\u1ebft.<\/p>\n<\/li>\n

              5. \n

                Qu\u1ea3n l\u00fd phi\u00ean:<\/strong> Proxy c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd phi\u00ean c\u1ee7a ng\u01b0\u1eddi d\u00f9ng m\u1ed9t c\u00e1ch an to\u00e0n, gi\u1ea3m nguy c\u01a1 chi\u1ebfm quy\u1ec1n \u0111i\u1ec1u khi\u1ec3n phi\u00ean.<\/p>\n<\/li>\n<\/ol>\n

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

                \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 Cross-site scripting (XSS), b\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

                  \n
                1. B\u1ea3ng m\u00e3 ng\u0103n ch\u1eb7n m\u00e3 l\u1ec7nh ch\u00e9o trang (XSS) c\u1ee7a OWASP<\/a><\/li>\n
                2. W3Schools \u2013 B\u1ea3o m\u1eadt JavaScript<\/a><\/li>\n
                3. Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 web c\u1ee7a Google - Ng\u0103n ch\u1eb7n t\u1eadp l\u1ec7nh ch\u00e9o trang web (XSS)<\/a><\/li>\n<\/ol>\n

                  H\u00e3y nh\u1edb r\u1eb1ng, vi\u1ec7c c\u1eadp nh\u1eadt th\u00f4ng tin v\u1ec1 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 b\u1ea3o m\u1eadt web l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea3o v\u1ec7 b\u1ea1n v\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u1ee7a b\u1ea1n kh\u1ecfi nh\u1eefng r\u1ee7i ro ti\u1ec1m \u1ea9n c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng XSS. Vi\u1ec7c tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd s\u1ebd b\u1ea3o v\u1ec7 c\u00e1c \u1ee9ng d\u1ee5ng web c\u1ee7a b\u1ea1n v\u00e0 \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m duy\u1ec7t web an to\u00e0n h\u01a1n cho t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi.<\/p>","protected":false},"featured_media":468044,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476483","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Cross-site scripting (XSS)<\/mark>","faq_items":[{"question":"What is Cross-site scripting (XSS)?","answer":"

                  Cross-site scripting (XSS) is a common web application security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. These scripts are then executed by the victims' browsers, leading to potential data theft, unauthorized access, or other harmful actions.<\/p>"},{"question":"How did Cross-site scripting (XSS) originate?","answer":"

                  The concept of Cross-site scripting dates back to the mid-1990s, with its first mention in a security mailing list in 1996. RSnake highlighted the risks of allowing users to submit unfiltered input to websites, which could result in the execution of malicious code on the victim's browser.<\/p>"},{"question":"What are the different types of Cross-site scripting (XSS) attacks?","answer":"

                  There are three primary types of XSS attacks:<\/p>

                  1. Stored XSS: The malicious script is permanently stored on the target server and served to users accessing the affected web page.<\/li>
                  2. Reflected XSS: The malicious script is embedded in a URL or other input, and the web application reflects it back to the user without proper validation.<\/li>
                  3. DOM-based XSS: The attack manipulates the Document Object Model (DOM) of a web page, executing the malicious script within the victim's browser due to flawed client-side scripting.<\/li><\/ol>"},{"question":"How does Cross-site scripting (XSS) work?","answer":"

                    XSS attacks occur when web applications fail to properly sanitize and validate user inputs. Attackers identify vulnerable points in the application, inject malicious scripts, and then unsuspecting users execute these scripts within their browsers.<\/p>"},{"question":"What are the key features of Cross-site scripting (XSS)?","answer":"

                    Key features of XSS include:<\/p>

                    • Client-side exploitation using web browsers.<\/li>
                    • Diverse exploitation vectors, such as input fields, URLs, and more.<\/li>
                    • Varying severity levels from annoying pop-ups to serious data breaches.<\/li>
                    • Dependency on user trust in the compromised website.<\/li>
                    • Context-based vulnerabilities with unique escaping requirements.<\/li><\/ul>"},{"question":"How can I protect my web applications from Cross-site scripting (XSS) attacks?","answer":"

                      To mitigate XSS vulnerabilities, follow these best practices:<\/p>

                      • Implement proper input validation and output encoding.<\/li>
                      • Use HTTP-only cookies to prevent session hijacking.<\/li>
                      • Employ Content Security Policy (CSP) to restrict executable scripts' sources.<\/li>
                      • Train developers on secure coding practices and conduct security audits regularly.<\/li><\/ul>"},{"question":"What are some future perspectives related to Cross-site scripting (XSS)?","answer":"

                        The future of XSS prevention lies in advancements in web application security and the adoption of secure development practices. Potential developments may include advanced input validation, AI-driven defenses, improved browser security features, and more extensive security training for developers.<\/p>"},{"question":"How can proxy servers help with Cross-site scripting (XSS) protection?","answer":"

                        Proxy servers can play a significant role in mitigating XSS risks. They can filter content, inspect encrypted traffic, analyze incoming requests, and implement Web Application Firewalls (WAFs) to detect and prevent XSS attacks. Proxy servers can also manage user sessions securely, reducing the risk of session hijacking.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476483","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\/476483\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468044"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}