{"id":478257,"date":"2023-08-09T09:29:53","date_gmt":"2023-08-09T09:29:53","guid":{"rendered":""},"modified":"2023-09-05T11:16:22","modified_gmt":"2023-09-05T11:16:22","slug":"ognl-injection","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/ognl-injection\/","title":{"rendered":"ti\u00eam OGNL"},"content":{"rendered":"<p>Th\u00f4ng tin t\u00f3m t\u1eaft v\u1ec1 ti\u00eam OGNL<\/p>\n<p>N\u1ed9i dung OGNL (Ng\u00f4n ng\u1eef \u0111i\u1ec1u h\u01b0\u1edbng \u0111\u1ed3 th\u1ecb \u0111\u1ed1i t\u01b0\u1ee3ng) l\u00e0 m\u1ed9t lo\u1ea1i l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt cho ph\u00e9p k\u1ebb t\u1ea5n c\u00f4ng th\u1ef1c thi m\u00e3 t\u00f9y \u00fd tr\u00ean m\u00e1y ch\u1ee7 c\u1ee7a \u1ee9ng d\u1ee5ng web. H\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c khai th\u00e1c c\u00e1c bi\u1ec3u th\u1ee9c OGNL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t s\u1ed1 khung web nh\u1ea5t \u0111\u1ecbnh, \u0111\u00e1ng ch\u00fa \u00fd nh\u1ea5t l\u00e0 Apache Struts. Vi\u1ec7c ch\u00e8n OGNL c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn ti\u1ebft l\u1ed9 th\u00f4ng tin tr\u00e1i ph\u00e9p, s\u1eeda \u0111\u1ed5i d\u1eef li\u1ec7u ho\u1eb7c th\u1eadm ch\u00ed x\u00e2m ph\u1ea1m to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a vi\u1ec7c ti\u00eam OGNL v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>T\u00ednh n\u0103ng ch\u00e8n OGNL \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn c\u00f9ng v\u1edbi s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng web v\u00e0 khung c\u00f4ng t\u00e1c d\u1ef1a tr\u00ean bi\u1ec3u th\u1ee9c OGNL cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 thao t\u00e1c d\u1eef li\u1ec7u v\u00e0 hi\u1ec3n th\u1ecb giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng. Apache Struts, m\u1ed9t framework m\u00e3 ngu\u1ed3n m\u1edf ph\u1ed5 bi\u1ebfn \u0111\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c \u1ee9ng d\u1ee5ng web Java, \u0111\u00e3 tr\u1edf th\u00e0nh n\u1ea1n nh\u00e2n ch\u00ednh c\u1ee7a l\u1ed7 h\u1ed5ng n\u00e0y.<\/p>\n<p>L\u1ea7n \u0111\u1ea7u ti\u00ean c\u00f4ng ch\u00fang \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c ti\u00eam OGNL l\u00e0 v\u00e0o n\u0103m 2011 khi m\u1ed9t nh\u00e0 nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u1ed7 h\u1ed5ng trong Apache Struts2. Ti\u1ebft l\u1ed9 n\u00e0y \u0111\u00e1nh d\u1ea5u s\u1ef1 kh\u1edfi \u0111\u1ea7u c\u1ee7a m\u1ed9t lo\u1ea1t c\u00e1c cu\u1ed9c \u0111i\u1ec1u tra v\u00e0 kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n v\u1ec1 c\u00e1c r\u1ee7i ro v\u00e0 vect\u01a1 t\u1ea5n c\u00f4ng li\u00ean quan \u0111\u1ebfn OGNL.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 OGNL Ti\u00eam: M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 OGNL Ti\u00eam<\/h2>\n<p>Vi\u1ec7c ti\u00eam OGNL kh\u00f4ng ch\u1ec9 gi\u1edbi h\u1ea1n \u1edf Apache Struts m\u00e0 c\u00f2n c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c khung c\u00f4ng t\u00e1c kh\u00e1c s\u1eed d\u1ee5ng OGNL. Ng\u00f4n ng\u1eef bi\u1ec3u th\u1ee9c m\u1ea1nh m\u1ebd n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u1ea5y v\u00e0 thi\u1ebft l\u1eadp c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng Java. Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c bi\u1ec3u th\u1ee9c OGNL \u0111\u1ed9c h\u1ea1i m\u00e0 khi \u0111\u01b0\u1ee3c m\u00e1y ch\u1ee7 \u0111\u00e1nh gi\u00e1 s\u1ebd th\u1ef1c thi m\u00e3 Java t\u00f9y \u00fd.<\/p>\n<h3>M\u1ee9c \u0111\u1ed9 nghi\u00eam tr\u1ecdng<\/h3>\n<p>Vi\u1ec7c ti\u00eam OGNL c\u00f3 th\u1ec3 g\u00e2y ra thi\u1ec7t h\u1ea1i nghi\u00eam tr\u1ecdng cho \u1ee9ng d\u1ee5ng ho\u1eb7c h\u1ec7 th\u1ed1ng. N\u00f3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n<ul>\n<li>Truy c\u1eadp tr\u00e1i ph\u00e9p<\/li>\n<li>Thao t\u00e1c d\u1eef li\u1ec7u<\/li>\n<li>Ti\u1ebfp qu\u1ea3n h\u1ec7 th\u1ed1ng<\/li>\n<\/ul>\n<h3>Vect\u01a1 t\u1ea5n c\u00f4ng<\/h3>\n<p>Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng khai th\u00e1c vi\u1ec7c x\u1eed l\u00fd kh\u00f4ng an to\u00e0n d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 thao t\u00fang c\u00e1c bi\u1ec3u th\u1ee9c OGNL. C\u00e1c vect\u01a1 t\u1ea5n c\u00f4ng \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n<ul>\n<li>Thao t\u00e1c c\u00e1c y\u00eau c\u1ea7u HTTP<\/li>\n<li>T\u1ea1o c\u00e1c URL \u0111\u1ed9c h\u1ea1i<\/li>\n<li>Thay \u0111\u1ed5i th\u00f4ng s\u1ed1 bi\u1ec3u m\u1eabu<\/li>\n<\/ul>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a qu\u00e1 tr\u00ecnh ti\u00eam OGNL: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a qu\u00e1 tr\u00ecnh ti\u00eam OGNL<\/h2>\n<p>Vi\u1ec7c ti\u00eam OGNL x\u1ea3y ra khi k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 ti\u00eam c\u00e1c bi\u1ec3u th\u1ee9c OGNL \u0111\u1ed9c h\u1ea1i v\u00e0o \u0111\u1ea7u v\u00e0o c\u1ee7a \u1ee9ng d\u1ee5ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng ph\u00e2n t\u00edch t\u1eebng b\u01b0\u1edbc v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u00ednh n\u0103ng ti\u00eam OGNL:<\/p>\n<ol>\n<li><strong>X\u1eed l\u00fd \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng<\/strong>: \u1ee8ng d\u1ee5ng x\u1eed l\u00fd kh\u00f4ng \u0111\u00fang c\u00e1ch d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u00f3 ch\u1ee9a bi\u1ec3u th\u1ee9c OGNL.<\/li>\n<li><strong>Ph\u00e2n t\u00edch bi\u1ec3u th\u1ee9c<\/strong>: M\u00e1y ch\u1ee7 ph\u00e2n t\u00edch bi\u1ec3u th\u1ee9c \u0111\u1ed9c h\u1ea1i.<\/li>\n<li><strong>Th\u1ef1c thi m\u00e3<\/strong>: Bi\u1ec3u th\u1ee9c \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1, d\u1eabn \u0111\u1ebfn vi\u1ec7c th\u1ef1c thi m\u00e3 t\u00f9y \u00fd tr\u00ean m\u00e1y ch\u1ee7.<\/li>\n<li><strong>K\u1ebft qu\u1ea3 t\u1ea5n c\u00f4ng<\/strong>: K\u1ebb t\u1ea5n c\u00f4ng gi\u00e0nh quy\u1ec1n ki\u1ec3m so\u00e1t ho\u1eb7c truy c\u1eadp tr\u00e1i ph\u00e9p v\u00e0o d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m.<\/li>\n<\/ol>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a OGNL ti\u00eam<\/h2>\n<p>Ti\u00eam OGNL n\u1ed5i b\u1eadt nh\u1edd m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng:<\/p>\n<ul>\n<li><strong>T\u00ednh linh ho\u1ea1t<\/strong>: N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho nhi\u1ec1u m\u1ee5c \u0111\u00edch \u0111\u1ed9c h\u1ea1i kh\u00e1c nhau, t\u1eeb \u0111\u00e1nh c\u1eafp d\u1eef li\u1ec7u \u0111\u1ebfn ki\u1ec3m so\u00e1t to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/li>\n<li><strong>\u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/strong>: Vi\u1ec7c t\u1ea1o ra c\u00e1c bi\u1ec3u th\u1ee9c OGNL \u0111\u1ed9c h\u1ea1i \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c v\u1ec1 m\u00f4i tr\u01b0\u1eddng Java v\u00e0 khung c\u1ee5 th\u1ec3.<\/li>\n<li><strong>A\u0309nh h\u01b0\u01a1\u0309ng l\u01a1n<\/strong>: Thi\u1ec7t h\u1ea1i ti\u1ec1m \u1ea9n t\u1eeb m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng th\u00e0nh c\u00f4ng l\u00e0 r\u1ea5t \u0111\u00e1ng k\u1ec3.<\/li>\n<li><strong>Kh\u00f3 gi\u1ea3m nh\u1eb9<\/strong>: Vi\u1ec7c b\u1ea3o m\u1eadt \u0111\u00fang c\u00e1ch m\u1ed9t \u1ee9ng d\u1ee5ng kh\u1ecfi vi\u1ec7c ti\u00eam OGNL y\u00eau c\u1ea7u x\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o c\u1ea9n th\u1eadn v\u00e0 c\u1ea5u h\u00ecnh khung ph\u00f9 h\u1ee3p.<\/li>\n<\/ul>\n<h2>C\u00e1c ki\u1ec3u ch\u00e8n OGNL: S\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 danh s\u00e1ch \u0111\u1ec3 vi\u1ebft<\/h2>\n<p>Ch\u1ee7 y\u1ebfu c\u00f3 hai lo\u1ea1i ti\u00eam OGNL:<\/p>\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>Ti\u00eam OGNL c\u1ed5 \u0111i\u1ec3n<\/td>\n<td>Khai th\u00e1c c\u00e1ch x\u1eed l\u00fd \u0111\u1ea7u v\u00e0o kh\u00f4ng an to\u00e0n c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 d\u1eabn \u0111\u1ebfn vi\u1ec7c th\u1ef1c thi m\u00e3 t\u00f9y \u00fd.<\/td>\n<\/tr>\n<tr>\n<td>Ti\u00eam OGNL m\u00f9<\/td>\n<td>M\u1ed9t bi\u1ebfn th\u1ec3 l\u00e9n l\u00fat h\u01a1n trong \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng l\u1ea5y th\u00f4ng tin th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n gi\u00e1n ti\u1ebfp, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1eb1ng c\u00e1ch quan s\u00e1t th\u1eddi gian ph\u1ea3n h\u1ed3i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng OGNL Ti\u00eam, 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<h3>C\u00e1ch s\u1eed d\u1ee5ng<\/h3>\n<ol>\n<li><strong>C\u00f4ng b\u1ed1 th\u00f4ng tin<\/strong>: Tr\u00edch xu\u1ea5t th\u00f4ng tin nh\u1ea1y c\u1ea3m t\u1eeb m\u00e1y ch\u1ee7.<\/li>\n<li><strong>Truy c\u1eadp tr\u00e1i ph\u00e9p<\/strong>: B\u1ecf qua c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c.<\/li>\n<li><strong>Th\u1ecfa hi\u1ec7p h\u1ec7 th\u1ed1ng<\/strong>: Ti\u1ebfp qu\u1ea3n to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng.<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h3>\n<ul>\n<li><strong>V\u1ea5n \u0111\u1ec1<\/strong>: X\u1eed l\u00fd kh\u00f4ng an to\u00e0n th\u00f4ng tin \u0111\u1ea7u v\u00e0o c\u1ee7a ng\u01b0\u1eddi d\u00f9ng\n<ul>\n<li><strong>Gi\u1ea3i ph\u00e1p<\/strong>: Th\u1ef1c hi\u1ec7n x\u00e1c th\u1ef1c v\u00e0 v\u1ec7 sinh \u0111\u1ea7u v\u00e0o nghi\u00eam ng\u1eb7t.<\/li>\n<\/ul>\n<\/li>\n<li><strong>V\u1ea5n \u0111\u1ec1<\/strong>: C\u1ea5u h\u00ecnh sai c\u1ee7a Framework\n<ul>\n<li><strong>Gi\u1ea3i ph\u00e1p<\/strong>: \u00c1p d\u1ee5ng c\u00e1c c\u1ea5u h\u00ecnh b\u1ea3o m\u1eadt ph\u00f9 h\u1ee3p v\u00e0 th\u01b0\u1eddng xuy\u00ean c\u1eadp nh\u1eadt khung l\u00ean c\u00e1c phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c v\u00e1.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 nh\u1eefng so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1 \u1edf d\u1ea1ng b\u1ea3ng v\u00e0 danh s\u00e1ch<\/h2>\n<table>\n<thead>\n<tr>\n<th>T\u00ednh n\u0103ng<\/th>\n<th>Ti\u00eam OGNL<\/th>\n<th>Ti\u00eam SQL<\/th>\n<th>L\u1ec7nh ti\u00eam<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ee5c ti\u00eau t\u1ea5n c\u00f4ng<\/td>\n<td>Bi\u1ec3u th\u1ee9c OGNL<\/td>\n<td>Truy v\u1ea5n SQL<\/td>\n<td>L\u1ec7nh h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td>S\u1ef1 va ch\u1ea1m<\/td>\n<td>Cao<\/td>\n<td>Cao<\/td>\n<td>Cao<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9 ph\u1ee9c t\u1ea1p<\/td>\n<td>Trung b\u00ecnh \u0111\u1ebfn cao<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<td>V\u1eeba ph\u1ea3i<\/td>\n<\/tr>\n<tr>\n<td>Gi\u1ea3m thi\u1ec3u \u0111i\u1ec3n h\u00ecnh<\/td>\n<td>X\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o<\/td>\n<td>B\u00e1o c\u00e1o \u0111\u00e3 chu\u1ea9n b\u1ecb<\/td>\n<td>X\u00e1c th\u1ef1c \u0111\u1ea7u v\u00e0o, tho\u00e1t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn vi\u1ec7c ti\u00eam OGNL<\/h2>\n<p>S\u1ef1 ph\u00e1t tri\u1ec3n li\u00ean t\u1ee5c trong c\u00e1c khung web v\u00e0 ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh li\u00ean t\u1ee5c ph\u00e1t tri\u1ec3n b\u1ed1i c\u1ea3nh c\u00e1c m\u1ed1i \u0111e d\u1ecda, bao g\u1ed3m c\u1ea3 vi\u1ec7c ti\u00eam OGNL. Tri\u1ec3n v\u1ecdng t\u01b0\u01a1ng lai bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>K\u1ef9 thu\u1eadt ph\u00e1t hi\u1ec7n n\u00e2ng cao<\/strong>: S\u1eed d\u1ee5ng m\u00e1y h\u1ecdc v\u00e0 AI \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 ng\u0103n ch\u1eb7n vi\u1ec7c ti\u00eam OGNL.<\/li>\n<li><strong>C\u1ea3i ti\u1ebfn khung<\/strong>: X\u00e2y d\u1ef1ng c\u00e1c khu\u00f4n kh\u1ed5 an to\u00e0n h\u01a1n nh\u1eb1m gi\u1ea3m thi\u1ec3u nguy c\u01a1 ti\u00eam OGNL.<\/li>\n<li><strong>Nh\u1eadn th\u1ee9c an ninh<\/strong>: N\u00e2ng cao gi\u00e1o d\u1ee5c v\u00e0 nh\u1eadn th\u1ee9c c\u1ee7a c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u1ec1 th\u1ef1c h\u00e0nh m\u00e3 h\u00f3a an to\u00e0n.<\/li>\n<\/ul>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi vi\u1ec7c ti\u00eam OGNL<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 trong c\u1ea3 h\u00e0nh vi t\u1ea5n c\u00f4ng v\u00e0 ph\u00f2ng th\u1ee7 li\u00ean quan \u0111\u1ebfn vi\u1ec7c ti\u00eam OGNL:<\/p>\n<ul>\n<li><strong>Vai tr\u00f2 ph\u00f2ng th\u1ee7<\/strong>: B\u1eb1ng c\u00e1ch tri\u1ec3n khai m\u00e1y ch\u1ee7 proxy \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 th\u1ec3 l\u1ecdc v\u00e0 gi\u00e1m s\u00e1t l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, t\u1eeb \u0111\u00f3 cung c\u1ea5p th\u00eam m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i vi\u1ec7c ti\u00eam OGNL.<\/li>\n<li><strong>Vai tr\u00f2 t\u1ea5n c\u00f4ng<\/strong>: Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 proxy \u0111\u1ec3 \u1ea9n danh t\u00ednh c\u1ee7a ch\u00fang trong khi ti\u1ebfn h\u00e0nh cu\u1ed9c t\u1ea5n c\u00f4ng ti\u00eam nhi\u1ec5m OGNL, khi\u1ebfn vi\u1ec7c ph\u00e1t hi\u1ec7n v\u00e0 x\u00e1c \u0111\u1ecbnh tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/li>\n<\/ul>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ol>\n<li><a href=\"https:\/\/struts.apache.org\/security\/\" target=\"_new\" rel=\"noopener nofollow\">B\u1ea3n tin b\u1ea3o m\u1eadt Apache Struts<\/a><\/li>\n<li><a href=\"https:\/\/owasp.org\/www-project-web-security-testing-guide\/latest\/4-Web_Application_Security_Testing\/07-Input_Validation_Testing\/12-Testing_for_OGNL_Injection\" target=\"_new\" rel=\"noopener nofollow\">H\u01b0\u1edbng d\u1eabn c\u1ee7a OWASP v\u1ec1 ki\u1ec3m tra vi\u1ec7c ti\u00eam OGNL<\/a><\/li>\n<li><a href=\"https:\/\/cwe.mitre.org\/data\/definitions\/917.html\" target=\"_new\" rel=\"noopener nofollow\">Chi ti\u1ebft CWE v\u1ec1 vi\u1ec7c ti\u00eam OGNL<\/a><\/li>\n<\/ol>\n<p>H\u01b0\u1edbng d\u1eabn m\u1edf r\u1ed9ng n\u00e0y cung c\u1ea5p s\u1ef1 hi\u1ec3u bi\u1ebft to\u00e0n di\u1ec7n v\u1ec1 vi\u1ec7c ch\u00e8n OGNL, n\u00eau b\u1eadt l\u1ecbch s\u1eed, c\u01a1 ch\u1ebf, t\u00ednh n\u0103ng, lo\u1ea1i v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy. N\u00f3 nh\u1ea5n m\u1ea1nh s\u1ef1 c\u1ea7n thi\u1ebft ph\u1ea3i c\u00f3 c\u00e1c bi\u1ec7n ph\u00e1p an ninh m\u1ea1nh m\u1ebd \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tinh vi v\u00e0 c\u00f3 s\u1ee9c t\u00e0n ph\u00e1 cao nh\u01b0 v\u1eady.<\/p>","protected":false},"featured_media":478258,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-478257","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>OGNL Injection<\/mark>","faq_items":[{"question":"What is OGNL Injection?","answer":"<p>OGNL Injection is a type of security vulnerability that allows an attacker to execute arbitrary code on a web application's server by exploiting OGNL expressions, which are commonly used in certain web frameworks like Apache Struts. The impact can range from unauthorized information disclosure to complete system compromise.<\/p>"},{"question":"What are the main types of OGNL Injection?","answer":"<p>There are primarily two types of OGNL Injection: Classic OGNL Injection, which exploits insecure handling of user inputs and leads to arbitrary code execution, and Blind OGNL Injection, a stealthier variant where the attacker gains information through indirect means, such as response times.<\/p>"},{"question":"How does OGNL Injection work?","answer":"<p>OGNL Injection occurs when an attacker injects malicious OGNL expressions into the application's input, which the server then parses and evaluates. This leads to the execution of arbitrary code on the server, and the attacker may gain unauthorized control or access to sensitive data.<\/p>"},{"question":"What are the key features of OGNL Injection?","answer":"<p>The key features of OGNL Injection include its versatility in malicious purposes, the complexity in crafting malicious expressions, the high impact resulting from a successful attack, and the difficulty in mitigating the vulnerability.<\/p>"},{"question":"How can OGNL Injection be prevented?","answer":"<p>OGNL Injection can be prevented by implementing strict input validation and sanitization, applying proper security configurations, and regularly updating the framework to patched versions.<\/p>"},{"question":"How is OGNL Injection different from other injections like SQL Injection?","answer":"<p>While OGNL Injection targets OGNL expressions and can lead to arbitrary code execution, SQL Injection targets SQL queries and can manipulate database queries. Command Injection, on the other hand, targets system commands. The impact is high for all these injections, but the targets and mitigation strategies vary.<\/p>"},{"question":"What are the future perspectives related to OGNL Injection?","answer":"<p>Future perspectives related to OGNL Injection include the development of advanced detection techniques using machine learning and AI, enhancements in web frameworks to minimize the risk, and increasing security awareness among developers.<\/p>"},{"question":"How can proxy servers like OneProxy be associated with OGNL Injection?","answer":"<p>Proxy servers like OneProxy can play a defensive role by filtering and monitoring traffic to provide protection against OGNL Injection. Conversely, attackers might also use proxy servers to hide their identity while conducting an OGNL Injection attack.<\/p>"},{"question":"Where can I find more information about OGNL Injection?","answer":"<p>You can find more information about OGNL Injection from sources like Apache Struts Security Bulletins, the OWASP Guide on Testing for OGNL Injection, and CWE details on OGNL Injection, all of which provide detailed insights into the vulnerability.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/478257","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\/478257\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/478258"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=478257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}