{"id":478235,"date":"2023-08-09T09:29:27","date_gmt":"2023-08-09T09:29:27","guid":{"rendered":""},"modified":"2023-09-05T11:16:20","modified_gmt":"2023-09-05T11:16:20","slug":"null-session","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/null-session\/","title":{"rendered":"Phi\u00ean r\u1ed7ng"},"content":{"rendered":"

Gi\u1edbi thi\u1ec7u v\u1ec1 phi\u00ean Null<\/h2>\n

Phi\u00ean Null l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef m\u1ea1ng m\u00e1y t\u00ednh d\u00f9ng \u0111\u1ec3 ch\u1ec9 k\u1ebft n\u1ed1i \u1ea9n danh, kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7. Phi\u00ean n\u00e0y cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb tr\u00ean h\u1ec7 th\u1ed1ng d\u1ef1a tr\u00ean Windows m\u00e0 kh\u00f4ng c\u1ea7n cung c\u1ea5p b\u1ea5t k\u1ef3 th\u00f4ng tin x\u00e1c th\u1ef1c n\u00e0o. Kh\u00e1i ni\u1ec7m phi\u00ean Null xu\u1ea5t hi\u1ec7n t\u1eeb m\u00f4i tr\u01b0\u1eddng h\u1ec7 \u0111i\u1ec1u h\u00e0nh Microsoft Windows v\u00e0 v\u1eeba l\u00e0 ch\u1ee7 \u0111\u1ec1 \u0111\u01b0\u1ee3c qu\u1ea3n tr\u1ecb vi\u00ean h\u1ec7 th\u1ed1ng quan t\u00e2m v\u1eeba l\u00e0 m\u1ed1i lo ng\u1ea1i ti\u1ec1m \u1ea9n v\u1ec1 b\u1ea3o m\u1eadt \u0111\u1ed1i v\u1edbi qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng.<\/p>\n

L\u1ecbch s\u1eed c\u1ee7a phi\u00ean Null<\/h2>\n

Ngu\u1ed3n g\u1ed1c c\u1ee7a phi\u00ean Null c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a m\u1ea1ng Microsoft Windows. N\u00f3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp l\u1ea7n \u0111\u1ea7u ti\u00ean trong h\u1ec7 \u0111i\u1ec1u h\u00e0nh Windows NT, h\u1ec7 \u0111i\u1ec1u h\u00e0nh n\u00e0y \u0111\u00e3 gi\u1edbi thi\u1ec7u giao th\u1ee9c Kh\u1ed1i th\u00f4ng b\u00e1o m\u00e1y ch\u1ee7 (SMB) \u0111\u1ec3 chia s\u1ebb t\u1ec7p v\u00e0 m\u00e1y in. Phi\u00ean Null thu h\u00fat s\u1ef1 ch\u00fa \u00fd khi Windows NT 4.0 \u0111\u01b0\u1ee3c ph\u00e1t h\u00e0nh v\u00e0o n\u0103m 1996. V\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3, n\u00f3 cho ph\u00e9p truy c\u1eadp \u1ea9n danh v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb tr\u00ean h\u1ec7 th\u1ed1ng Windows NT. M\u1eb7c d\u00f9 t\u00ednh n\u0103ng n\u00e0y ban \u0111\u1ea7u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m m\u1ee5c \u0111\u00edch t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u0169 nh\u01b0ng n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t r\u1ee7i ro b\u1ea3o m\u1eadt ti\u1ec1m \u1ea9n do b\u1ecb c\u00e1c t\u00e1c nh\u00e2n \u0111\u1ed9c h\u1ea1i l\u1ea1m d\u1ee5ng.<\/p>\n

Th\u00f4ng tin chi ti\u1ebft v\u1ec1 phi\u00ean Null<\/h2>\n

Trong phi\u00ean Null, m\u00e1y kh\u00e1ch thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i \u0111\u1ebfn m\u00e1y ch\u1ee7 m\u00e0 kh\u00f4ng cung c\u1ea5p b\u1ea5t k\u1ef3 th\u00f4ng tin \u0111\u0103ng nh\u1eadp n\u00e0o. M\u00e1y kh\u00e1ch s\u1eed d\u1ee5ng gi\u00e1 tr\u1ecb tr\u1ed1ng ho\u1eb7c null cho tr\u01b0\u1eddng t\u00ean ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u1eadt kh\u1ea9u trong qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c. Sau khi k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp, m\u00e1y kh\u00e1ch c\u00f3 th\u1ec3 truy c\u1eadp m\u1ed9t s\u1ed1 t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb nh\u1ea5t \u0111\u1ecbnh tr\u00ean m\u00e1y ch\u1ee7, bao g\u1ed3m c\u00e1c th\u01b0 m\u1ee5c, t\u1ec7p v\u00e0 th\u00f4ng tin \u0111\u0103ng k\u00fd \u0111\u01b0\u1ee3c chia s\u1ebb.<\/p>\n

C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a phi\u00ean Null<\/h2>\n

C\u01a1 ch\u1ebf \u0111\u1eb1ng sau phi\u00ean Null li\u00ean quan \u0111\u1ebfn vi\u1ec7c m\u00e1y kh\u00e1ch g\u1eedi y\u00eau c\u1ea7u SMB c\u00f3 gi\u00e1 tr\u1ecb null \u0111\u1ec3 x\u00e1c th\u1ef1c. Khi m\u00e1y ch\u1ee7 nh\u1eadn \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u n\u00e0y, n\u00f3 s\u1ebd x\u1eed l\u00fd k\u1ebft n\u1ed1i nh\u01b0 m\u1ed9t phi\u00ean \u1ea9n danh, c\u1ea5p quy\u1ec1n truy c\u1eadp h\u1ea1n ch\u1ebf v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb c\u00f3 s\u1eb5n cho nh\u00f3m \u201cM\u1ecdi ng\u01b0\u1eddi\u201d ho\u1eb7c nh\u00f3m \u201c\u0110\u0103ng nh\u1eadp \u1ea9n danh\u201d. \u0110i\u1ec1u quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd l\u00e0 m\u1ee9c \u0111\u1ed9 truy c\u1eadp \u0111\u01b0\u1ee3c c\u1ea5p th\u00f4ng qua phi\u00ean Null t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5u h\u00ecnh c\u1ee7a m\u00e1y ch\u1ee7 v\u00e0 c\u00e1c quy\u1ec1n \u0111\u01b0\u1ee3c g\u00e1n cho c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb c\u1ee5 th\u1ec3.<\/p>\n

Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a phi\u00ean Null<\/h2>\n

\u0110\u1ec3 hi\u1ec3u c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a phi\u00ean Null, h\u00e3y \u0111i s\u00e2u v\u00e0o c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a n\u00f3:<\/p>\n

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  1. \n

    Truy c\u1eadp \u1ea9n danh<\/strong>: Phi\u00ean Null cung c\u1ea5p quy\u1ec1n truy c\u1eadp \u1ea9n danh v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb tr\u00ean h\u1ec7 th\u1ed1ng Windows, cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng xem v\u00e0 truy c\u1eadp d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng c\u1ea7n x\u00e1c th\u1ef1c.<\/p>\n<\/li>\n

  2. \n

    \u0110\u1eb7c quy\u1ec1n h\u1ea1n ch\u1ebf<\/strong>: Quy\u1ec1n truy c\u1eadp \u0111\u01b0\u1ee3c c\u1ea5p th\u00f4ng qua phi\u00ean Null b\u1ecb h\u1ea1n ch\u1ebf \u0111\u1ed1i v\u1edbi c\u00e1c t\u00e0i nguy\u00ean c\u00f3 th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c b\u1edfi nh\u00f3m \u201cM\u1ecdi ng\u01b0\u1eddi\u201d ho\u1eb7c \u201c\u0110\u0103ng nh\u1eadp \u1ea9n danh\u201d.<\/p>\n<\/li>\n

  3. \n

    \u00dd ngh\u0129a b\u1ea3o m\u1eadt<\/strong>: Phi\u00ean Null c\u00f3 th\u1ec3 g\u00e2y ra r\u1ee7i ro b\u1ea3o m\u1eadt n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p. Ng\u01b0\u1eddi d\u00f9ng tr\u00e1i ph\u00e9p c\u00f3 th\u1ec3 khai th\u00e1c t\u00ednh n\u0103ng n\u00e0y \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin nh\u1ea1y c\u1ea3m ho\u1eb7c kh\u1edfi \u0111\u1ed9ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tr\u00ean m\u1ea1ng.<\/p>\n<\/li>\n<\/ol>\n

    C\u00e1c lo\u1ea1i phi\u00ean Null<\/h2>\n

    Phi\u00ean Null c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean ch\u1ee9c n\u0103ng v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang l\u00ean h\u1ec7 th\u1ed1ng:<\/p>\n\n\n\n\n\n\n\n
    Ki\u1ec3u<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
    V\u00f4 danh Null<\/td>\nCung c\u1ea5p quy\u1ec1n truy c\u1eadp ch\u1ec9 \u0111\u1ecdc v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb, h\u1ea1n ch\u1ebf ng\u01b0\u1eddi d\u00f9ng th\u1ef1c hi\u1ec7n c\u00e1c thay \u0111\u1ed5i \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng.<\/td>\n<\/tr>\n
    Kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7<\/td>\nCung c\u1ea5p quy\u1ec1n truy c\u1eadp \u0111\u1ecdc v\u00e0 ghi v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb, c\u1ea5p quy\u1ec1n ki\u1ec3m so\u00e1t h\u1ec7 th\u1ed1ng t\u1ed1t h\u01a1n.<\/td>\n<\/tr>\n
    R\u1ed7ng b\u1ecb h\u1ea1n ch\u1ebf<\/td>\nGi\u1edbi h\u1ea1n quy\u1ec1n truy c\u1eadp v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb c\u1ee5 th\u1ec3, t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt \u0111\u1ed3ng th\u1eddi cho ph\u00e9p c\u00e1c ho\u1ea1t \u0111\u1ed9ng c\u1ea7n thi\u1ebft.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    C\u00e1ch s\u1eed d\u1ee5ng phi\u00ean Null v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 li\u00ean quan<\/h2>\n

    C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee7a phi\u00ean Null:<\/h3>\n
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    1. \n

      Ch\u1ea9n \u0111o\u00e1n m\u1ea1ng<\/strong>: Phi\u00ean Null c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 m\u1ea1ng nh\u1eb1m x\u00e1c \u0111\u1ecbnh c\u00e1c s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i ti\u1ec1m \u1ea9n v\u00e0 x\u00e1c minh t\u00ednh kh\u1ea3 d\u1ee5ng c\u1ee7a t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb.<\/p>\n<\/li>\n

    2. \n

      \u1ee8ng d\u1ee5ng k\u1ebf th\u1eeba<\/strong>: M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng v\u00e0 h\u1ec7 th\u1ed1ng c\u0169 h\u01a1n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u quy\u1ec1n truy c\u1eadp phi\u00ean Null \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n<\/li>\n

    3. \n

      Li\u1ec7t k\u00ea t\u1eeb xa<\/strong>: Qu\u1ea3n tr\u1ecb vi\u00ean h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng phi\u00ean Null \u0111\u1ec3 li\u1ec7t k\u00ea t\u1eeb xa nh\u1eb1m thu th\u1eadp th\u00f4ng tin v\u1ec1 ng\u01b0\u1eddi d\u00f9ng, nh\u00f3m v\u00e0 t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb tr\u00ean h\u1ec7 th\u1ed1ng Windows.<\/p>\n<\/li>\n<\/ol>\n

      V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p:<\/h3>\n
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      1. \n

        R\u1ee7i ro b\u1ea3o m\u1eadt<\/strong>: Phi\u00ean Null c\u00f3 th\u1ec3 b\u1ecb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ed9c h\u1ea1i khai th\u00e1c \u0111\u1ec3 truy c\u1eadp tr\u00e1i ph\u00e9p. \u0110\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro n\u00e0y, qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng n\u00ean t\u1eaft phi\u00ean Null ho\u1eb7c h\u1ea1n ch\u1ebf quy\u1ec1n truy c\u1eadp c\u1ee7a h\u1ecd v\u00e0o c\u00e1c t\u00e0i nguy\u00ean c\u1ea7n thi\u1ebft.<\/p>\n<\/li>\n

      2. \n

        L\u1ed7 h\u1ed5ng m\u1ea1ng<\/strong>: Phi\u00ean kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ti\u1ebft l\u1ed9 th\u00f4ng tin nh\u1ea1y c\u1ea3m, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u00ean t\u00e0i kho\u1ea3n ng\u01b0\u1eddi d\u00f9ng v\u00e0 n\u1ed9i dung chia s\u1ebb. Ki\u1ec3m tra b\u1ea3o m\u1eadt th\u01b0\u1eddng xuy\u00ean v\u00e0 \u0111\u00e1nh gi\u00e1 ki\u1ec3m so\u00e1t truy c\u1eadp l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 ng\u0103n ch\u1eb7n r\u00f2 r\u1ec9 d\u1eef li\u1ec7u.<\/p>\n<\/li>\n

      3. \n

        Kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch h\u1ec7 th\u1ed1ng k\u1ebf th\u1eeba<\/strong>: Trong tr\u01b0\u1eddng h\u1ee3p c\u1ea7n c\u00f3 phi\u00ean Null cho c\u00e1c \u1ee9ng d\u1ee5ng c\u0169, qu\u1ea3n tr\u1ecb vi\u00ean n\u00ean xem x\u00e9t tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t truy c\u1eadp v\u00e0 ph\u00e2n \u0111o\u1ea1n m\u1ea1ng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro b\u1ea3o m\u1eadt.<\/p>\n<\/li>\n<\/ol>\n

        C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n

        \u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 phi\u00ean Null so v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1, h\u00e3y n\u00eau b\u1eadt c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a ch\u00fang:<\/p>\n\n\n\n\n\n\n\n
        Thu\u1eadt ng\u1eef<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
        Phi\u00ean r\u1ed7ng<\/td>\nTruy c\u1eadp kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb tr\u00ean h\u1ec7 th\u1ed1ng Windows, ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng giao th\u1ee9c SMB.<\/td>\n<\/tr>\n
        Truy c\u1eadp \u1ea9n danh<\/td>\nKh\u1ea3 n\u0103ng truy c\u1eadp t\u00e0i nguy\u00ean m\u00e0 kh\u00f4ng c\u1ea7n cung c\u1ea5p th\u00f4ng tin x\u00e1c th\u1ef1c, th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn truy c\u1eadp web.<\/td>\n<\/tr>\n
        Quy\u1ec1n truy c\u1eadp c\u1ee7a kh\u00e1ch<\/td>\nM\u1ed9t kh\u00e1i ni\u1ec7m t\u01b0\u01a1ng t\u1ef1 nh\u01b0 phi\u00ean Null, cung c\u1ea5p quy\u1ec1n truy c\u1eadp h\u1ea1n ch\u1ebf v\u00e0o t\u00e0i nguy\u00ean m\u00e0 kh\u00f4ng c\u1ea7n x\u00e1c th\u1ef1c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn phi\u00ean Null<\/h2>\n

        Khi c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n, kh\u00e1i ni\u1ec7m phi\u00ean Null \u0111ang d\u1ea7n tr\u1edf n\u00ean l\u1ed7i th\u1eddi do nh\u1eefng lo ng\u1ea1i v\u1ec1 b\u1ea3o m\u1eadt. C\u00e1c h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 giao th\u1ee9c m\u1ea1ng hi\u1ec7n \u0111\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi c\u00e1c t\u00ednh n\u0103ng b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd kh\u00f4ng c\u00f2n cho ph\u00e9p truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c chia s\u1ebb. Tr\u1ecdng t\u00e2m \u0111\u00e3 chuy\u1ec3n sang tri\u1ec3n khai c\u00e1c c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c an to\u00e0n, ch\u1eb3ng h\u1ea1n nh\u01b0 x\u00e1c th\u1ef1c \u0111a y\u1ebfu t\u1ed1 (MFA) v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp d\u1ef1a tr\u00ean vai tr\u00f2 (RBAC).<\/p>\n

        M\u00e1y ch\u1ee7 proxy v\u00e0 phi\u00ean Null<\/h2>\n

        Ch\u1ee9c n\u0103ng phi\u00ean Null ch\u1ee7 y\u1ebfu c\u00f3 li\u00ean quan trong m\u00f4i tr\u01b0\u1eddng Windows v\u00e0 kh\u00f4ng c\u00f3 li\u00ean k\u1ebft tr\u1ef1c ti\u1ebfp v\u1edbi m\u00e1y ch\u1ee7 proxy. Tuy nhi\u00ean, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt m\u1ea1ng b\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp v\u00e0o nhi\u1ec1u t\u00e0i nguy\u00ean kh\u00e1c nhau, bao g\u1ed3m c\u00e1c th\u01b0 m\u1ee5c v\u00e0 t\u1ec7p d\u00f9ng chung. B\u1eb1ng c\u00e1ch \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp th\u00f4ng qua m\u00e1y ch\u1ee7 proxy, qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng c\u00f3 th\u1ec3 tri\u1ec3n khai c\u00e1c l\u1edbp x\u00e1c th\u1ef1c v\u00e0 m\u00e3 h\u00f3a b\u1ed5 sung \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m kh\u1ecfi b\u1ecb truy c\u1eadp tr\u00e1i ph\u00e9p.<\/p>\n

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

        \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 phi\u00ean Null v\u00e0 \u00fd ngh\u0129a c\u1ee7a n\u00f3, vui l\u00f2ng tham kh\u1ea3o c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n

          \n
        1. Microsoft TechNet: Hi\u1ec3u phi\u00ean Null<\/a><\/li>\n
        2. Vi\u1ec7n SANS: Phi\u00ean Null KH\u00d4NG \u1ed5n<\/a><\/li>\n
        3. US-CERT (Nh\u00f3m s\u1eb5n s\u00e0ng \u1ee9ng ph\u00f3 kh\u1ea9n c\u1ea5p m\u00e1y t\u00ednh c\u1ee7a Hoa K\u1ef3): Hi\u1ec3u v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c phi\u00ean v\u00e0 chia s\u1ebb r\u1ed7ng<\/a><\/li>\n<\/ol>\n

          T\u00f3m l\u1ea1i, phi\u00ean Null, m\u1eb7c d\u00f9 c\u00f3 li\u00ean quan v\u1ec1 m\u1eb7t l\u1ecbch s\u1eed, nh\u01b0ng l\u00e0 m\u1ed9t t\u00ednh n\u0103ng kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng n\u1eefa v\u00e0 d\u1ec5 b\u1ecb t\u1ed5n th\u01b0\u01a1ng v\u1ec1 b\u1ea3o m\u1eadt trong m\u00f4i tr\u01b0\u1eddng Windows hi\u1ec7n \u0111\u1ea1i. Vi\u1ec7c s\u1eed d\u1ee5ng n\u00f3 g\u00e2y ra r\u1ee7i ro \u0111\u00e1ng k\u1ec3 n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd \u0111\u00fang c\u00e1ch v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m t\u1ed5n h\u1ea1i \u0111\u1ebfn d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m. Qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng n\u00ean t\u1eaft phi\u00ean Null khi kh\u00f4ng c\u1ea7n thi\u1ebft v\u00e0 tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a m\u1ea1ng.<\/p>","protected":false},"featured_media":478236,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478235","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Null Session: An Exploration of its Origin, Functionality, and Use Cases<\/mark>","faq_items":[{"question":"What is Null Session?","answer":"

          Null Session is a computer networking term referring to an anonymous, unauthenticated connection between a client and a Windows-based server. It allows users to access shared resources without providing any login credentials.<\/p>"},{"question":"How did Null Session originate?","answer":"

          Null Session emerged from the Microsoft Windows environment and was first mentioned in the Windows NT operating system. It gained attention with the release of Windows NT 4.0 in 1996, enabling anonymous access to shared resources.<\/p>"},{"question":"How does Null Session work?","answer":"

          In a Null Session, a client establishes a connection without providing login credentials. The server treats it as an anonymous session, granting limited access to shared resources available to \"Everyone\" or \"Anonymous Logon\" groups.<\/p>"},{"question":"What are the key features of Null Session?","answer":"