{"id":51882,"date":"2025-08-11T08:24:50","date_gmt":"2025-08-11T00:24:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51882.html"},"modified":"2025-08-11T08:24:50","modified_gmt":"2025-08-11T00:24:50","slug":"ctfshow-pwn%e5%85%a5%e9%97%a8-%e5%89%8d%e7%bd%ae%e5%9f%ba%e7%a1%80%ef%bc%88pwn034%ef%bc%89wp","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51882.html","title":{"rendered":"CTFshow-pwn\u5165\u95e8-\u524d\u7f6e\u57fa\u7840\uff08pwn0~34\uff09WP"},"content":{"rendered":"<h3>Test_your_nc<\/h3>\n<p>\u6b64\u90e8\u5206\u9898\u76ee\u8f83\u4e3a\u7b80\u5355\uff0cflag \u5f80\u5f80\u5f88\u5bb9\u6613\u5f97\u5230\uff0c\u4f46\u5bf9\u5165\u95e8\u5b66\u8005\u6765\u8bf4\u7406\u89e3\u7a0b\u5e8f\u8fd0\u884c\u539f\u7406\u6bd4\u62ff flag \u66f4\u91cd\u8981\uff0c\u6240\u4ee5\u6709\u65f6\u5f97\u5230\u4e86 flag \u4e5f\u4f1a\u7ee7\u7eed\u5206\u6790\uff0c\u5404\u4f4d\u8001\u5e08\u5085\u4e0d\u5fc5\u7ea0\u7ed3\uff0c\u5acc\u9ebb\u70e6\u8df3\u8fc7\u5373\u53ef\u3002<\/p>\n<h4>pwn0<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002446-6899384eefb86.png\" alt=\"\"><\/p>\n<p>\u8fd9\u4e00\u9898\u662f\u5f69\u86cb\u9898\uff0c\u8f93\u5165\u8fde\u63a5\u5bc6\u7801\u540e\uff0c\u6709\u4e00\u4e9b\u4e0d\u5b8c\u6574\u7684\u5267\u60c5\u548c\u82b1\u91cc\u80e1\u54e8\u7684\u52a0\u8f7d\u754c\u9762\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002447-6899384f5005d.png\" alt=\"\"><\/p>\n<p>\u63d0\u793a\u8bf4\u53ea\u6709\u4e09\u79d2\u65f6\u95f4\uff0c\u5176\u5b9e\u662f\u5413\u4eba\u7684\uff0c\u8fd9\u91cc\u76f4\u63a5\u83b7\u53d6\u4e86 shell<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002447-6899384f62f89.png\" alt=\"\"><\/p>\n<p>pwd\u6307\u4ee4\u67e5\u770b\u5f53\u524d\u76ee\u5f55<\/p>\n<p>ls\u53d1\u73b0\u5f53\u524d\u76ee\u5f55\u4e0b\u6ca1\u4e1c\u897f<\/p>\n<p>cd \/\u56de\u5230\u4e0a\u4e00\u7ea7\u76ee\u5f55<\/p>\n<p>ls\u53d1\u73b0\u5f53\u524d\u76ee\u5f55\u4e0b\u6709\u6587\u4ef6ctfshow_flag<\/p>\n<p>cat ctfshow_flag\u5f97\u5230 flag<\/p>\n<h4>pwn1<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002447-6899384f80d74.png\" alt=\"\"><\/p>\n<p>\u4e0b\u8f7d\u9644\u4ef6\u5728\u865a\u62df\u673a\u4e2d\u6253\u5f00<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002447-6899384fb151b.png\" alt=\"\"><\/p>\n<p>chmod 777 pwn\u7ed9\u9644\u4ef6\u52a0\u6743\u9650<\/p>\n<p>checksec pwn\u67e5\u770b\u9644\u4ef6\u4fe1\u606f\uff0c64 \u4f4d<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002447-6899384fc4e09.png\" alt=\"\"><\/p>\n<p>.\/pwn\u8fd0\u884c\u9644\u4ef6\uff0c\u62a5\u9519\u6ca1\u6709\u627e\u5230\/ctfshow_flag<\/p>\n<p>\u7528 ida \u6253\u5f00\uff0cF5\u53cd\u7f16\u8bd1\u7a0b\u5e8f<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002447-6899384fdd880.png\" alt=\"\"><\/p>\n<p>\u53d1\u73b0\u7a0b\u5e8f\u76f4\u63a5\u6253\u5370\u51fa flag \uff0c\u672c\u5730\u865a\u62df\u673a\u6ca1\u6709 flag \u6587\u4ef6\u6240\u4ee5\u62a5\u9519<\/p>\n<p>nc \u8fde\u63a5\u9898\u76ee\u5bb9\u5668<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-68993850314c1.png\" alt=\"\"><\/p>\n<p>\u5f97\u5230 flag<\/p>\n<h4>pwn2<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-68993850481e7.png\" alt=\"\"><\/p>\n<p>\u4e0b\u8f7d\u9644\u4ef6\u5728\u865a\u62df\u673a\u4e2d\u6253\u5f00<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-6899385067ec4.png\" alt=\"\"><\/p>\n<p>chmod 777 pwn\u7ed9\u9644\u4ef6\u52a0\u6743\u9650<\/p>\n<p>checksec pwn\u67e5\u770b\u9644\u4ef6\u4fe1\u606f\uff0c64 \u4f4d<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-6899385079be0.png\" alt=\"\"><\/p>\n<p>.\/pwn\u8fd0\u884c\u9644\u4ef6\uff0c\u53d1\u73b0\u76f4\u63a5\u62ff\u5230\u4e86 shell<\/p>\n<p>nc \u8fde\u63a5\u9898\u76ee\u5bb9\u5668<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-689938508d2dd.png\" alt=\"\"><\/p>\n<p>cat ctfshow_flag\u5f97\u5230 flag<\/p>\n<p>\u518d\u6765 ida \u91cc\u5206\u6790\u4e00\u4e0b\u9644\u4ef6\uff0cF5\u53cd\u7f16\u8bd1\u7a0b\u5e8f<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-68993850a03db.png\" alt=\"\"><\/p>\n<p>\u679c\u7136\u662f\u76f4\u63a5\u628a shell \u7ed9\u6211\u4eec\u4e86<\/p>\n<h4>pwn3<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-68993850baaa8.png\" alt=\"\"><\/p>\n<p>\u4e0b\u8f7d\u9644\u4ef6\u5728\u865a\u62df\u673a\u4e2d\u6253\u5f00<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002448-68993850e8d7e.png\" alt=\"\"><\/p>\n<p>chmod 777 pwn\u7ed9\u9644\u4ef6\u52a0\u6743\u9650<\/p>\n<p>checksec pwn\u67e5\u770b\u9644\u4ef6\u4fe1\u606f\uff0c64 \u4f4d<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002449-6899385109805.png\" alt=\"\"><\/p>\n<p>.\/pwn\u8fd0\u884c\u9644\u4ef6\uff0c\u9700\u8981\u4f5c\u51fa\u9009\u62e9\uff0c\u660e\u663e\u9009\u9879 6 \u662f\u6b63\u786e\u7684\uff0c\u672c\u5730\u6ca1\u6709 flag \u6587\u4ef6\u62a5\u9519<\/p>\n<p>nc \u8fde\u63a5\u9898\u76ee\u5bb9\u5668<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002449-689938511e9b9.png\" alt=\"\"><\/p>\n<p>\u9009\u62e9\u9009\u9879 6\uff0c\u6210\u529f\u5f97\u5230 flag<\/p>\n<p>\u8fd8\u662f\u518d\u6765 ida \u91cc\u5206\u6790\u4e00\u4e0b\u9644\u4ef6\uff0cF5\u53cd\u7f16\u8bd1\u7a0b\u5e8f<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002449-689938513264b.png\" alt=\"\"><\/p>\n<p>\u5176\u4ed6\u9009\u9879\u90fd\u65e0\u6cd5\u8bfb\u51fa flag\uff0c\u9009\u9879 6 \u6267\u884c\u4e86 system_func() \u8fd9\u4e2a\u51fd\u6570\uff0c\u70b9\u5f00\u51fd\u6570<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002449-6899385168822.png\" alt=\"\"><\/p>\n<p>\u53d1\u73b0\u8be5\u51fd\u6570\u529f\u80fd\u5373\u662f\u6253\u5370 flag<\/p>\n<h4>pwn4<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811002449-689938517690c.png\" alt=\"\"><\/p>\n<p>\u8001\u6837\u5b50\uff0c\u4e0b\u8f7d\u9644\u4ef6\u5728\u865a\u62df\u673a\u4e2d\u6253\u5f00<\/p>\n<p><img decoding=\"async\" src=\"2025-08-114okfhp3fmyc.png\" alt=\"\"><\/p>\n<p>chmod 777 pwn\u7ed9\u9644\u4ef6\u52a0\u6743\u9650<\/p>\n<p>checksec pwn\u67e5\u770b\u9644\u4ef6\u4fe1\u606f\uff0c64 \u4f4d<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11twoxxeroown.png\" alt=\"\"><\/p>\n<p>.\/pwn\u8fd0\u884c\u9644\u4ef6\uff0c\u968f\u4fbf\u8f93\u5165\u56de\u8f66\uff0c\u7a0b\u5e8f\u9000\u51fa\uff0c\u7ed3\u5408\u63d0\u793a\u731c\u6d4b\u9700\u8981\u8f93\u5165\u6b63\u786e\u7684\u5b57\u7b26<\/p>\n<p>\u7528 ida \u6253\u5f00\uff0cF5\u53cd\u7f16\u8bd1\u7a0b\u5e8f<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11vawrkn5l01u.png\" alt=\"\"><\/p>\n<p>\u5206\u6790\u7a0b\u5e8f\uff0c\u8fd9\u4e09\u90e8\u5206\u610f\u601d\u5206\u522b\u662f\uff1a<\/p>\n<li>\u5c06 s1 \u7684\u503c\u6539\u4e3a CTFshowPWN<\/li>\n<li>\u8f93\u5165 s2<\/li>\n<li>s1 \u7b49\u4e8e s2 \u65f6\u6267\u884c\u51fd\u6570 execve_func()<\/li>\n<p>\u70b9\u8fdb execve_func() \u51fd\u6570\u53d1\u73b0\u8fd9\u91cc\u53ef\u4ee5\u83b7\u53d6 shell<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11xu4mfritkma.png\" alt=\"\"><\/p>\n<p>nc \u8fde\u63a5\u9898\u76ee\u5bb9\u5668\uff0c\u6784\u9020 s1 \u7b49\u4e8e s2\uff0c\u5373\u8f93\u5165 CTFshowPWN<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11tzospkq0435.png\" alt=\"\"><\/p>\n<p>\u62ff\u5230\u6743\u9650\uff0ccat ctfshow_flag\u5f97\u5230 flag<\/p>\n<h3>\u524d\u7f6e\u57fa\u7840<\/h3>\n<p>\u6b64\u90e8\u5206\u9898\u76ee\u662f\u5173\u4e8e pwn \u5b66\u4e60\u7684\u4e00\u4e9b\u524d\u7f6e\u57fa\u7840\u77e5\u8bc6\u5185\u5bb9\uff0c\u8f83\u4e3a\u7b80\u5355\uff0cflag \u5f80\u5f80\u5f88\u5bb9\u6613\u5f97\u5230\uff0c\u4f46\u5bf9\u5165\u95e8\u5b66\u8005\u6765\u8bf4\u7406\u89e3\u7a0b\u5e8f\u8fd0\u884c\u539f\u7406\u6bd4\u62ff flag \u66f4\u91cd\u8981\uff0c\u6240\u4ee5\u6709\u65f6\u5f97\u5230\u4e86 flag \u4e5f\u4f1a\u7ee7\u7eed\u5206\u6790\uff0c\u5404\u4f4d\u8001\u5e08\u5085\u4e0d\u5fc5\u7ea0\u7ed3\uff0c\u5acc\u9ebb\u70e6\u8df3\u8fc7\u5373\u53ef\u3002<\/p>\n<h4>pwn5<\/h4>\n<p>pwn5-pwn12 \u7b80\u5355\u4ecb\u7ecd\u4e86\u6c47\u7f16\u8bed\u8a00\u7684\u51e0\u79cd\u5bfb\u5740\u65b9\u5f0f\uff0c\u867d\u7136\u6709\u6ce8\u91ca\uff0c\u4f46\u4e5f\u8981\u9010\u6e10\u7406\u89e3\u6c47\u7f16\u7684\u610f\u601d\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11pvrfq5bjsae.png\" alt=\"\"><\/p>\n<p>\u4e0b\u8f7d\u9644\u4ef6\u5728\u865a\u62df\u673a\u6253\u5f00<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11t3myubecjzb.png\" alt=\"\"><\/p>\n<p>chmod 777 Welcome_to_CTFshow\u7ed9\u9644\u4ef6\u52a0\u6743\u9650<\/p>\n<p>checksec Welcome_to_CTFshow\u67e5\u770b\u9644\u4ef6\u4fe1\u606f\uff0c32 \u4f4d\uff0c\u5c0f\u7aef<\/p>\n<p>.\/Welcome_to_CTFshow\u8fd0\u884c\u9644\u4ef6\uff0c\u5176\u4e2d%\u662f\u6362\u884c\u6807\u8bc6<\/p>\n<p>\u5219 flag \u4e3a&lt;font style=\\&#8221;color:rgb(33, 37, 41);\\&#8221;&gt;ctfshow{Welcome_to_CTFshow_PWN}&lt;\/font&gt;<\/p>\n<p>\u8fd8\u662f\u518d\u6765 ida \u91cc\u5206\u6790\u4e00\u4e0b\u9644\u4ef6\uff0cF5\u53cd\u7f16\u8bd1\u7a0b\u5e8f<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11qxjwjxzaa1p.png\" alt=\"\"><\/p>\n<p>\u7cfb\u7edf\u8c03\u7528\u8f93\u51fa dword_80490E8 \u5730\u5740\u540e\u7684 0x16 \u4e2a\u5b57\u8282\uff0c\u5373 22 \u4e2a\u5b57\u7b26<\/p>\n<p>\u70b9\u8fdb\u8be5\u5730\u5740\u7ee7\u7eed\u89c2\u5bdf<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11ly500axx5f1.png\" alt=\"\"><\/p>\n<p>\u8be5\u5730\u5740\u4e0b\u662f\u5341\u516d\u8fdb\u5236\u6570\u636e 636c6557 \uff0c\u53f3\u952e\u9009\u62e9\uff08\u6216\u5149\u6807\u653e\u5728\u8be5\u6570\u636e\u4e0a\u6309 R\uff09\u53ef\u4ee5\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\u5f62\u5f0f\uff0c\u5373\u4e3a cleW<\/p>\n<p>\u7531\u4e8e\u662f\u5c0f\u7aef\u5e8f\uff0c0x636c6557\u7684\u4f4e\u4f4d 0x57 \u5148\u8f93\u51fa\u63a5\u7740\u662f 0x65\u2026\u2026\u2026<\/p>\n<p>\u6240\u4ee5\u8f93\u51fa\u4e3a Welc<\/p>\n<p><img decoding=\"async\" src=\"2025-08-1143dspfwjqle.png\" alt=\"\"><\/p>\n<p>\u518d\u63a5\u4e0a\u540e\u9762\u7684\u5185\u5bb9\u6b63\u597d 22 \u5b57\u7b26<\/p>\n<h4>pwn6<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11ag2zom312zk.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 Welcome_to_CTFshow.asm\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11tfiosbiu1ro.png\" alt=\"\"><\/p>\n<p>\u6ce8\u91ca\u5199\u7684\u5f88\u6e05\u695a\u4e86\uff0c\u4e00\u6b65\u4e00\u6b65\u8ba1\u7b97\uff0c\u6700\u540e eax \u7684\u503c\u4e3a 114514<\/p>\n<p>\u6839\u636e\u9898\u76ee\u8981\u6c42\uff0cflag\u4e3a\uff1a ctfshow{114514}<\/p>\n<h4>pwn7<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11mltao055usb.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;Welcome_to_CTFshow.asm&lt;\/font&gt;\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11njgef5krixe.png\" alt=\"\"><\/p>\n<p>\u6ce8\u91ca\u5199\u7684\u5f88\u6e05\u695a\u4e86\uff0c\u5bc4\u5b58\u5668\u5bfb\u5740\u65b9\u5f0f\u7ed3\u675f\u540eedx\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u4e3a0x36d<\/p>\n<p>\u6839\u636e\u9898\u76ee\u8981\u6c42\uff0cflag\u4e3a\uff1actfshow{0x36D} \uff0cd\u8981\u5927\u5199<\/p>\n<h4>pwn8<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11cyhhuzb1vc2.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;Welcome_to_CTFshow.asm&lt;\/font&gt;\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11pfeycwmmrcz.png\" alt=\"\"><\/p>\n<p>\u6ce8\u91ca\u5199\u7684\u5f88\u6e05\u695a\u4e86\uff0c\u60f3\u770b\u5230 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;msg&lt;\/font&gt; \u7684\u5730\u5740\u9700\u8981\u5c06\u5df2\u7ecf\u7f16\u8bd1\u597d\u7684\u7a0b\u5e8f\u53cd\u7f16\u8bd1<\/p>\n<p>ida \u6253\u5f00 elf \u6587\u4ef6\uff0c&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;F5&lt;\/font&gt;\u53cd\u7f16\u8bd1\u7a0b\u5e8f<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11pepwhngnaoq.png\" alt=\"\"><\/p>\n<p>\u8fd9\u4e9b\u5730\u5740\u662f\u5341\u516d\u8fdb\u5236\u6570\u636e\uff0c\u6240\u4ee5\u5728\u524d\u9762\u52a0 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x&lt;\/font&gt;<\/p>\n<p>flag \u4e3a\uff1actfshow{0x80490E8}<\/p>\n<h4>pwn9<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11qtbfgwm1wxx.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;Welcome_to_CTFshow.asm&lt;\/font&gt;\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11gexa44ixsx3.png\" alt=\"\"><\/p>\n<p>\u6839\u636e\u6ce8\u91ca\uff0cesi\u5b58\u7684\u5730\u5740\u662f &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490E8&lt;\/font&gt;<\/p>\n<p>ida \u6253\u5f00 elf \u6587\u4ef6\uff0c&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;F5&lt;\/font&gt;\u53cd\u7f16\u8bd1\u7a0b\u5e8f\uff0c\u8ddf\u8fdb\u5730\u5740<\/p>\n<p><img decoding=\"async\" src=\"2025-08-112jl2tjovx44.png\" alt=\"\"><\/p>\n<p>\u8be5\u5730\u5740\u6307\u5411\u7684\u503c\u5373\u4e3a 636C557h \u8fd9\u91cc\u7684 h \u8868\u793a\u5341\u516d\u8fdb\u5236\uff0c\u6211\u4eec\u7528 0x \u8868\u793a<\/p>\n<p>\u6240\u4ee5\u672c\u9898\u7684 flag \u4e3a\uff1actfshow{0x636C6557} <\/p>\n<h4>pwn10<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11amwob035b2o.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;Welcome_to_CTFshow.asm&lt;\/font&gt;\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11xa3gdxbmudr.png\" alt=\"\"><\/p>\n<p>\u5206\u6b65\u89e3\u6790\uff1a<\/p>\n<li>\u8d4b\u503c\uff1aecx \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490E8&lt;\/font&gt;<\/li>\n<li>+4\uff1a&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;ecx&lt;\/font&gt; \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490EC&lt;\/font&gt;<\/li>\n<li>&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;eax&lt;\/font&gt; \u503c\u4e3a\u5730\u5740 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490EC&lt;\/font&gt; \u5904\u7684\u503c<\/li>\n<p>ida \u6253\u5f00 elf \u6587\u4ef6\uff0c&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;F5&lt;\/font&gt;\u53cd\u7f16\u8bd1\u7a0b\u5e8f\uff0c\u6309 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;G&lt;\/font&gt; \uff0c\u8f93\u5165\u5730\u5740\u8df3\u8f6c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-112p55b4sdg4t.png\" alt=\"\"><\/p>\n<p>\u6240\u4ee5\u672c\u9898 flag \u4e3a\uff1actfshow{ome_to_CTFshow_PWN}<\/p>\n<h4>pwn11<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11eiqllvtfm0h.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;Welcome_to_CTFshow.asm&lt;\/font&gt;\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11f3vpzjoovig.png\" alt=\"\"><\/p>\n<p>\u5206\u6b65\u89e3\u6790\uff1a<\/p>\n<li>\u8d4b\u503c\uff1aecx \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490E8&lt;\/font&gt;<\/li>\n<li>\u8d4b\u503c\uff1a&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;edx&lt;\/font&gt; \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;2&lt;\/font&gt;<\/li>\n<li>\u8ba1\u7b97\u8d4b\u503c\uff1a&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;eax&lt;\/font&gt; \u503c\u4e3a\u5730\u5740 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490E8 + 2 * 2&lt;\/font&gt;=&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490EC&lt;\/font&gt; \u5904\u7684\u503c<\/li>\n<p>ida \u6253\u5f00 elf \u6587\u4ef6\uff0c&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;F5&lt;\/font&gt;\u53cd\u7f16\u8bd1\u7a0b\u5e8f\uff0c\u6309 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;G&lt;\/font&gt; \uff0c\u8f93\u5165\u5730\u5740\u8df3\u8f6c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-112p55b4sdg4t.png\" alt=\"\"><\/p>\n<p>\u6240\u4ee5\u672c\u9898 flag \u4ecd\u4e3a\uff1actfshow{ome_to_CTFshow_PWN}<\/p>\n<h4>pwn12<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11tolblbo3hfx.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;Welcome_to_CTFshow.asm&lt;\/font&gt;\u6c47\u7f16\u6587\u4ef6<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11f03lyjfrsuw.png\" alt=\"\"><\/p>\n<p>\u5206\u6b65\u89e3\u6790\uff1a<\/p>\n<li>\u8d4b\u503c\uff1aecx \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490E8&lt;\/font&gt;<\/li>\n<li>\u8d4b\u503c\uff1a&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;edx&lt;\/font&gt; \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;1&lt;\/font&gt;<\/li>\n<li>+8\uff1aecx \u503c\u4e3a &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490F0&lt;\/font&gt;<\/li>\n<li>\u8ba1\u7b97\u8d4b\u503c\uff1a&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;eax&lt;\/font&gt; \u503c\u4e3a\u5730\u5740 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490F0 + 1 * 2 &#8211; 6&lt;\/font&gt;=&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;0x80490EC&lt;\/font&gt; \u5904\u7684\u503c<\/li>\n<p>ida \u6253\u5f00 elf \u6587\u4ef6\uff0c&lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;F5&lt;\/font&gt;\u53cd\u7f16\u8bd1\u7a0b\u5e8f\uff0c\u6309 &lt;font style=\\&#8221;color:rgb(77, 77, 77);\\&#8221;&gt;G&lt;\/font&gt; \uff0c\u8f93\u5165\u5730\u5740\u8df3\u8f6c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-112p55b4sdg4t.png\" alt=\"\"><\/p>\n<p>\u6240\u4ee5\u672c\u9898 flag \u4ecd\u4e3a\uff1actfshow{ome_to_CTFshow_PWN}<\/p>\n<h4>pwn13<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-114huduqy4p11.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 flag.c \u6587\u4ef6\uff0c\u7528 ASCII \u7801\u7684\u5f62\u5f0f\u50a8\u5b58\u4e86\u591a\u4e2a\u5b57\u7b26\uff0c\u4e5f\u5e94\u8be5\u5c31\u662f\u6211\u4eec\u7684 flag<\/p>\n<p><img decoding=\"async\" src=\"2025-08-114q22vswqose.png\" alt=\"\"><\/p>\n<p>\u6309\u7167\u9898\u76ee\u8981\u6c42\u7f16\u8bd1\uff0c gcc flag.c -o flag<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11kvokbliaeom.png\" alt=\"\"><\/p>\n<p>.\/flag \u8fd0\u884c\u62ff\u5230 flag<\/p>\n<h4>pwn14<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11vu5glkybevq.png\" alt=\"\"><\/p>\n<p>\u6253\u5f00 flag.c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11y21b54aezpp.png\" alt=\"\"><\/p>\n<p>\u8fd9\u91cc\u8bfb\u53d6\u4e86\u6587\u4ef6 key \u7684\u5185\u5bb9\uff0c\u7531\u4e8e\u6ca1\u6709\u8be5\u6587\u4ef6\uff0c\u76f4\u63a5\u7f16\u8bd1\u8fd0\u884c\u4f1a\u62a5\u9519<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11a0gfbf1pikw.png\" alt=\"\"><\/p>\n<p>\u521b\u5efa key \u6587\u4ef6\u5e76\u586b\u5199\u9898\u76ee\u4e2d\u7684\u5bc6\u94a5\uff0c\u518d\u8fd0\u884c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11vpv233ldbos.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"2025-08-111mlcomazwsl.png\" alt=\"\"><\/p>\n<p>\u6210\u529f\u62ff\u5230 flag<\/p>\n<h4>pwn15<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-114tpp1pbbthl.png\" alt=\"\"><\/p>\n<p>.asm \u662f\u6c47\u7f16\u4ee3\u7801\u6587\u4ef6\uff0c\u8bfb\u6c47\u7f16\u4ee3\u7801\u51e0\u4e4e\u6ca1\u6709\u4efb\u4f55\u53ef\u8bfb\u6027\uff0c\u8fd8\u662f\u6309\u7167\u9898\u76ee\u8981\u6c42\u6765\u7f16\u8bd1\u8fd0\u884c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11nssaij4nmlm.png\" alt=\"\"><\/p>\n<p>\u6c47\u7f16\uff1anasm -f elf32 flag.asm -o flag.o<\/p>\n<p>\u94fe\u63a5\uff1ald -m elf_i386 flag.o -o flag<\/p>\n<p><img decoding=\"async\" src=\"2025-08-1125d0yhwp1mb.png\" alt=\"\"><\/p>\n<p>\u5f97\u5230 flag<\/p>\n<h4>pwn16<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11uoxn3sgko4i.png\" alt=\"\"><\/p>\n<p>.s \u4e5f\u662f\u6c47\u7f16\u4ee3\u7801\u6587\u4ef6\uff0c\u4e5f\u65e0\u6cd5\u8bfb\uff0c\u8fd8\u662f\u6309\u7167\u9898\u76ee\u8981\u6c42\u6765\u7f16\u8bd1\u8fd0\u884c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11urqjg3oda0n.png\" alt=\"\"><\/p>\n<p>\u7f16\u8bd1\uff1agcc flag.s -o flag<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11gp1dij4r5gg.png\" alt=\"\"><\/p>\n<p>\u5f97\u5230 flag<\/p>\n<h4>pwn17<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-11paydsafhel4.png\" alt=\"\"><\/p>\n<p>\u67e5\u770b\u6587\u4ef6\u4fe1\u606f<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11nojmgrchccw.png\" alt=\"\"><\/p>\n<p>64 \u4f4d\u5c0f\u7aef\u5e8f\uff0c\u8fd0\u884c\u9644\u4ef6\uff0c\u8ba9\u6211\u4eec\u9009\u62e9<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11gb15apni54l.png\" alt=\"\"><\/p>\n<p>\u6328\u4e2a\u5c1d\u8bd5\u540e\u53d1\u73b0\u9009\u9879 1 \u548c 4 \u6ca1\u4ec0\u4e48\u6548\u679c\uff0c\u9009\u9879 3 \u8fdf\u8fdf\u4e0d\u51fa\u7ed3\u679c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11gcxvssszqkz.png\" alt=\"\"><\/p>\n<p>\u9009\u9879 2 \u53ef\u4ee5\u5217\u51fa\u6839\u76ee\u5f55\u6587\u4ef6\uff0c\u53d1\u73b0 flag \u5c31\u5728\u6839\u76ee\u5f55\u91cc<\/p>\n<p>\u62d6\u8fdb ida \u5206\u6790\uff0cF5 \u53cd\u7f16\u8bd1<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11wlhj4xeaxlm.png\" alt=\"\"><\/p>\n<p>\u53d1\u73b0\u9009\u9879 3 \u7684\u7b49\u5f85\u65f6\u95f4\u8fc7\u4e8e\u4e45\u8fdc\uff0c\u6240\u4ee5\u8003\u8651\u4ece\u9009\u9879 2 \u4e2d\u5165\u624b<\/p>\n<p>\u9700\u8981\u95ed\u5408\u518d\u5199\u547d\u4ee4\uff0c\u5177\u4f53\u6709\u4e24\u79cd\u65b9\u5f0f<\/p>\n<li>\u76f4\u63a5 cat flag \u6587\u4ef6<\/li>\n<p>;cat ctfshow_flag \u53d1\u73b0\u8fdb\u5165\u6b7b\u5faa\u73af\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a\u8f93\u5165\u592a\u957f\u6ea2\u51fa\u5bfc\u81f4\u7684<\/p>\n<p>\u6539\u4e3a;cat ctf*\u5176\u4e2d*\u662f\u901a\u914d\u7b26\uff0c\u6587\u4ef6\u540d\u7b26\u5408\u8fd9\u4e2a\u5f62\u5f0f\u7684\u90fd\u4f1a\u88ab\u6267\u884c<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11w4zuw5fotd5.png\" alt=\"\"><\/p>\n<p>\u5f97\u5230 flag<\/p>\n<li>;\/bin\/sh\u62ff shell \u6743\u9650\uff0c\u518d\u67e5\u770b flag<\/li>\n<p><img decoding=\"async\" src=\"2025-08-11a4tqduiqsf3.png\" alt=\"\"><\/p>\n<p>\u540c\u6837\u5f97\u5230 flag<\/p>\n<h4>pwn18<\/h4>\n<p><img decoding=\"async\" src=\"2025-08-115daf5au1feb.png\" alt=\"\"><\/p>\n<p>\u67e5\u770b\u9644\u4ef6\u4fe1\u606f<\/p>\n<p><img decoding=\"async\" src=\"2025-08-110wlfvueoci4.png\" alt=\"\"><\/p>\n<p>64 \u4f4d\u5c0f\u7aef\u5e8f\uff0c\u76f4\u63a5\u8fd0\u884c\u6ca1\u4ec0\u4e48\u4e1c\u897f\uff0c\u968f\u4fbf\u8f93\u5165\u540e\u5f39\u51fa \u4e24\u6761\u62a5\u9519<\/p>\n<p>\u62d6\u8fdb ida \u5206\u6790\uff0cF5 \u53cd\u7f16\u8bd1<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11piv311zxtth.png\" alt=\"\"><\/p>\n<p>\u53d1\u73b0\u4e00\u4e2a\u5224\u65ad\u548c\u4e24\u4e2a\u51fd\u6570<\/p>\n<p><img decoding=\"async\" src=\"2025-08-11lquo1fzqj45.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"2025-08-11dyaib5i5kp2.png\" alt=\"\"><\/p>\n<p>\u771f\u5047\u51fd\u6570\u7684\u533a\u522b\u5728\u4e8e&gt;&gt;\u548c&gt;\uff0c\u5176\u4e2d&gt;&gt;\u662f\u8ffd\u52a0\u5199\u5165\uff0c&gt;\u662f\u8986\u76d6\u5199\u5165<\/p>\n<p>\u6240\u4ee5\u6211\u4eec\u5e94\u8be5\u6267\u884cfake()\u51fd\u6570\u4e2d\u7684&gt;&gt;\uff0c\u6240\u4ee5v4<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb479\u6b21\uff0c\u70b9\u8d5e17\u6b21\uff0c\u6536\u85cf9\u6b21\u3002\u8fd9\u79cd\u60c5\u51b5\u4e00\u822c\u4f1a\u51fa\u73b0\u5728\u51fd\u6570\u4e2d\u9700\u8981\u4f7f\u7528 GOT \u8868\u5730\u5740\u7684\u65f6\u5019\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u4e3b\u7a0b\u5e8f\u4e2d ebx \u662f\u6709\u503c\u7684\uff0c\u5728\u8c03\u7528\u7ea6\u5b9a\u4e2d ebx \u7528\u6765\u4e34\u65f6\u5b58\u653e GOT \u8868\u771f\u5b9e\u5730\u5740\uff0c\u65b9\u4fbf\u51fd\u6570\u4f7f\u7528\uff0c\u8fd9\u65f6\u5c31\u4f1a\u628a ebx 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