{"id":230,"date":"2021-08-10T08:31:39","date_gmt":"2021-08-10T08:31:39","guid":{"rendered":"http:\/\/49.235.100.226\/?p=230"},"modified":"2021-08-31T08:40:32","modified_gmt":"2021-08-31T08:40:32","slug":"pikachu-unsafe-upfileupload","status":"publish","type":"post","link":"http:\/\/www.nokws.top\/index.php\/2021\/08\/10\/pikachu-unsafe-upfileupload\/","title":{"rendered":"Pikachu–Unsafe Upfileupload"},"content":{"rendered":"\n

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–\u9a8c\u8bc1\u6587\u4ef6\u7c7b\u578b\u3001\u540e\u7f00\u540d\u3001\u5927\u5c0f;
–\u9a8c\u8bc1\u6587\u4ef6\u7684\u4e0a\u4f20\u65b9\u5f0f;
–\u5bf9\u6587\u4ef6\u8fdb\u884c\u4e00\u5b9a\u590d\u6742\u7684\u91cd\u547d\u540d;
–\u4e0d\u8981\u66b4\u9732\u6587\u4ef6\u4e0a\u4f20\u540e\u7684\u8def\u5f84;
–\u7b49\u7b49…<\/p>\n\n\n\n

Unsafe Fileupload<\/strong> \u5ba2\u6237\u7aef\u68c0\u67e5\uff08client check\uff09<\/p>\n\n\n\n

F12 \u68c0\u67e5\u201c\u5f00\u59cb\u4e0a\u4f20\u201d<\/p>\n\n\n\n

\u5220\u9664onchange<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

Unsafe Fileupload<\/strong> MIME type<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u5b9e\u9645\u4e0a\u8fd9\u4e2a\u670d\u52a1\u7aef\u68c0\u67e5\u53ea\u68c0\u67e5\u4e86 html\u5305\uff08\u5927\u6982\u8fd9\u4e48\u53eb\u5427\uff09\u91cc\u7684Content-Type \u5c5e\u6027<\/p>\n\n\n\n

\u5728burp\u4e2d\u4fee\u6539\u5c5e\u6027\u503c\u3002<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

Unsafe Fileupload<\/strong> getimagesize()<\/p>\n\n\n\n

<\/p>\n\n\n\n

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\u8fd9\u4e2a\u65f6\u5019\u5c31\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u5982\u679c\u4e0a\u4f20\u7684\u6587\u4ef6\u662f\u56fe\u7247\uff0c\u90a3\u63d2\u5165\u7684\u6076\u610f\u4ee3\u7801\u600e\u4e48\u6267\u884c\u5462\uff1f\u76f4\u63a5\u8bbf\u95ee\u540e\u7f00\u4e3apng\u683c\u5f0f\u7684\u6587\u4ef6\u8fd4\u56de\u5c31\u662f\u56fe\u7247\u3002\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u7ed3\u5408\u6587\u4ef6\u5305\u542b\u7684\u7ec4\u5408\u62f3\u6765\u89e3\u6790\u6076\u610f\u4ee3\u7801\u3002\u4e0a\u4f20\u56fe\u7247\u9a6c\u62ff\u5230\u4e0a\u4f20\u4f4d\u7f6e\u540e\uff0c\u7ed3\u5408\u524d\u9762\u8bf4\u5230\u7684\u6587\u4ef6\u5305\u542b\u6f0f\u6d1e\u5373\u53ef\u9a8c\u8bc1\u6b64\u90e8\u5206\u6f0f\u6d1e\u3002
<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u7528010editor\u6253\u5f00\u53d1\u73b0 \u4e4b\u524d\u5199\u7684test1.txt \u4e2d\u7684 123456 \u5df2\u7ecf\u5199\u5165\u5230\u56fe\u7247\u4e86\uff08\u8fd9\u4e5f\u662f\u6700\u7b80\u5355\u7684\u56fe\u7247\u9690\u5199\u5427\uff09<\/p>\n\n\n\n

\u7136\u540e\u6210\u529f\u4e0a\u4f20\u56fe\u7247\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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