{"id":103,"date":"2026-07-27T02:16:29","date_gmt":"2026-07-26T18:16:29","guid":{"rendered":"https:\/\/reverier.cn\/?p=103"},"modified":"2026-07-27T02:16:30","modified_gmt":"2026-07-26T18:16:30","slug":"%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96%e6%bc%8f%e6%b4%9e%e5%9f%ba%e7%a1%80","status":"publish","type":"post","link":"https:\/\/reverier.cn\/index.php\/2026\/07\/27\/%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96%e6%bc%8f%e6%b4%9e%e5%9f%ba%e7%a1%80\/","title":{"rendered":"\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u57fa\u7840"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u4ec0\u4e48\u662f\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\uff1f<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u53cd\u5e8f\u5217\u5316\u7684\u672c\u8d28\u5176\u5b9e\u662f\u4ee3\u7801\u7684\u94fe\u5f0f\u53cd\u5e94<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u662f\u6307\u7a0b\u5e8f\u5728\u53cd\u5e8f\u5217\u5316\u671f\u95f4\u901a\u8fc7\u7279\u6b8a\u7684\u8c03\u7528\u94fe\u5f15\u53d1\u7684\u4e00\u7cfb\u5217\u5b89\u5168\u95ee\u9898\uff0c\u4e8b\u5b9e\u4e0a\u4e00\u5207\u5177\u6709\u53cd\u5e8f\u5217\u5316\u7600\u6cd5\u529f\u80fd\u7684\u7f16\u7a0b\u8bed\u8a00\u90fd\u6709\u5b58\u5728\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u7684\u53ef\u80fd\u6027\uff0c\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u662f\u622a\u7136\u4e0d\u540c\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u5b9e\u73b0\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u7684\u529f\u80fd\u65f6\u662f\u622a\u7136\u4e0d\u540c\u7684<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u5c31\u662f\u6307\u5f53\u76ee\u6807\u7a0b\u5e8f\u5bf9\u653b\u51fb\u8005\u53ef\u63a7\u7684\u6570\u636e\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u5904\u7406\u65f6\u800c\u4ea7\u751f\u7684\u5b89\u5168\u95ee\u9898<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u9700\u8981\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u7684\u529f\u80fd\uff1f<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u4ee3\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\u5f88\u591a\u90fd\u662f\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u7684\uff0c\u7a0b\u5e8f\u4e0e\u7a0b\u5e8f\u4e4b\u95f4\u901a\u5e38\u9700\u8981\u4f20\u9012\u6570\u636e\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5f53\u4f20\u9012\u7684\u662f\u6570\u5b57\u548c\u5b57\u7b26\u4e32\u65f6<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u9700\u8981\u76f4\u63a5\u53d1\u9001\u548c\u63a5\u6536\u5373\u53ef<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5982\u679c\u662f\u4e00\u4e2a\u5bf9\u8c61\u5462<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u9700\u8981\u628a\u5bf9\u8c61\u6253\u5305\uff0c\u63a5\u6536\u65b9\u5f0f\u6309\u7167\u540c\u6837\u7684\u65b9\u6cd5\u8fdb\u884c\u201c\u89e3\u5305\u201d\uff0c\u5373\u53ef\u8fd8\u539f\u51fa\u5bf9\u8c61\u7684\u5168\u90e8\u7279\u5f81\uff0c\u4e3b\u8981\u662f\u4f20\u8f93\u548c\u5b58\u50a8<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u4ec0\u4e48\u662f\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\u5e8f\u5217\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u7a0b\u5e8f\u5185\u5b58\u4e2d\u7684\u5bf9\u8c61\u8f6c\u6362\u6210\u4e00\u79cd\u5177\u6709\u4ee3\u8868\u6027\u7684\u6570\u636e\u5b57\u8282\u6d41\uff0c\u7531\u5bf9\u8c61\u8f6c\u6362\u5f97\u5230\u5b57\u8282\u6d41\u7684\u8fc7\u7a0b\u5c31\u79f0\u4f5c\u5e8f\u5217\u5316<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53cd\u5e8f\u5217\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u83b7\u53d6\u5e8f\u5217\u5316\u6570\u636e\u7684\u4e00\u65b9\uff0c\u9700\u8981\u4ece\u8fd9\u4e9b\u5b57\u8282\u6d41\u91cc\u8fd8\u539f\u5f97\u5230\u5bf9\u5e94\u7684\u5bf9\u8c61\u72b6\u6001\u4fe1\u606f\uff0c\u7531\u5b57\u8282\u6d41\u8f6c\u6362\u5f97\u5230\u5bf9\u8c61\u7684\u8fc7\u7a0b\u79f0\u4e3a\u53cd\u5e8f\u5217\u5316<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5e8f\u5217\u5316\u5c31\u662f\u5c06\u5bf9\u8c61\u8f6c\u6362\u6210\u6570\u636e\u5b57\u8282\u6d41\uff0c\u53cd\u5e8f\u5217\u5316\u5c31\u662f\u5c06\u6570\u636e\u5b57\u8282\u6d41\u8f6c\u6362\u6210\u5bf9\u8c61<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e8f\u5217\u5316\u662f\u4e00\u4e2a\u6bd4\u8f83\u5bbd\u6cdb\u7684\u6982\u5ff5\uff0c\u5e76\u6ca1\u6709\u7edf\u4e00\u7684\u56fa\u5b9a\u5f62\u5f0f\u3002\u53cd\u5e8f\u5217\u5316\u4e5f\u4e00\u6837\uff0c\u5bf9\u4e8e\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u4e0d\u540c\u7684\u6570\u636e\u5904\u7406\u5e93\u6765\u8bf4\uff0c\u5e8f\u5217\u5316\u5728\u5177\u4f53\u7684\u5b9e\u73b0\u673a\u5236\u4e0a\u90fd\u4f1a\u6709\u6240\u4e0d\u540c\uff0c\u4ece\u800c\u5bfc\u81f4\u76f8\u5e94\u7684\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u5229\u7528\u6761\u4ef6\u6216\u96be\u5ea6\u4f1a\u6709\u6240\u4e0d\u540c<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Java\u53cd\u5e8f\u5217\u5316\u57fa\u7840<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">java.io.Serializable<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u636e<strong>java\u539f\u751f\u6807\u51c6<\/strong>\u91cc\u63d0\u4f9b\u7684\u53cd\u5e8f\u5217\u5316\u673a\u5236\uff0c\u5982\u679c\u8981\u5bf9\u4e00\u4e2a\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u673a\u5236\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5bf9\u8c61\u7684\u7c7b\u5c31\u5fc5\u987b\u8981\u5b9e\u73b0java.io.Serializable\u63a5\u53e3<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">writeObject<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>java.io.ObjectOutputStream<\/strong>\u7c7b\u7684<strong>writeObject<\/strong>\u65b9\u6cd5\u7528\u6765\u5bf9\u4e00\u4e2aJava\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316\uff0c\u4f8b\u5982\uff0c\u5c06\u8868\u793a\u5f53\u524d\u65e5\u671f\u7684Date\u5bf9\u8c61\u5e8f\u5217\u5316\u9053\u672c\u5730\u6587\u4ef6\u4e2d<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">FileOutputStream f =new FileOutputStream(\"data.ser\");<br>ObjectOutput s = new ObjectOutputStream(f);<br>s.writeObject(new Date());<br>s.flush();<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">\u7b2c\u4e00\u884c\uff1a<br>\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\u5b57\u8282\u8f93\u51fa\u6d41\u3002\u5b83\u4f1a\u5728\u5f53\u524d\u9879\u76ee\u7684\u8fd0\u884c\u76ee\u5f55\u4e0b\u5bfb\u627e\u4e00\u4e2a\u540d\u4e3a data.ser \u7684\u6587\u4ef6\uff1b\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u5c31\u4f1a\u81ea\u52a8\u521b\u5efa\u5b83\u3002.ser \u662f Java \u5e8f\u5217\u5316\u6587\u4ef6\u5e38\u7528\u7684\u7ea6\u5b9a\u6269\u5c55\u540d\uff08\u4ee3\u8868 serialization\uff09\u3002\u8fd9\u4e2a\u6d41\u7684\u4f5c\u7528\u4ec5\u4ec5\u662f\u201c\u5411\u8fd9\u4e2a\u6587\u4ef6\u5199\u5165\u539f\u59cb\u7684\u5b57\u8282\u6570\u636e\u201d\u3002<br>\u7b2c\u4e8c\u884c\uff1a<br>FileOutputStream \u53ea\u80fd\u5199\u5165\u539f\u59cb\u7684\u4e8c\u8fdb\u5236\u5b57\u8282\u3002\u4e3a\u4e86\u80fd\u76f4\u63a5\u5199\u5165 Java \u5bf9\u8c61\uff0c\u9700\u8981\u7528\u5230\u201c\u88c5\u9970\u5668\u6a21\u5f0f\u201d\uff0c\u7528 ObjectOutputStream \u628a\u521a\u624d\u7684 f \u5305\u88c5\u8d77\u6765\u3002\u8fd9\u6837\uff0cs \u5c31\u5177\u5907\u4e86\u5c06\u590d\u6742\u7684 Java \u5bf9\u8c61\u6253\u788e\u6210\u5b57\u8282\u5e8f\u5217\uff08\u5e8f\u5217\u5316\uff09\u7684\u80fd\u529b\uff0c\u7136\u540e\u518d\u901a\u8fc7\u5185\u90e8\u7684 f \u628a\u8fd9\u4e9b\u5b57\u8282\u5199\u8fdb\u6587\u4ef6\u91cc\u3002<br>\u7b2c\u4e09\u884c\uff1a<br>new Date() \u521b\u5efa\u4e86\u4e00\u4e2a\u4ee3\u8868\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4\u7684\u65e5\u671f\u5bf9\u8c61\uff08\u5c5e\u4e8e java.util.Date \u7c7b\uff09\u3002<br>writeObject(...) \u662f\u5bf9\u8c61\u6d41\u7684\u6838\u5fc3\u65b9\u6cd5\u3002\u5b83\u4f1a\u6293\u53d6\u8fd9\u4e2a Date \u5bf9\u8c61\u7684\u5f53\u524d\u72b6\u6001\uff0c\u5c06\u5176\u8f6c\u6362\u4e3a\u4e00\u4e32\u7279\u5b9a\u7684\u5b57\u8282\u5e8f\u5217\uff0c\u5e76\u5199\u5165\u5230 data.ser \u6587\u4ef6\u4e2d\u3002<br>\u6ce8\u610f\uff1a \u53ea\u6709\u5b9e\u73b0\u4e86 java.io.Serializable \u63a5\u53e3\u7684\u7c7b\u624d\u80fd\u88ab\u8fd9\u6837\u5199\u5165\uff0c\u800c Date \u7c7b\u6070\u597d\u5728 Java \u6e90\u7801\u4e2d\u5b9e\u73b0\u4e86\u8fd9\u4e2a\u63a5\u53e3\u3002<br>\u7b2c\u56db\u884c\uff1a<br>Java \u5728\u5199\u5165\u6570\u636e\u65f6\u901a\u5e38\u4f1a\u5148\u5c06\u6570\u636e\u6682\u5b58\u5728\u5185\u5b58\u7684\u4e00\u4e2a\u7f13\u51b2\u533a (Buffer) \u4e2d\uff0c\u7b49\u7f13\u51b2\u533a\u6ee1\u4e86\u518d\u7edf\u4e00\u5199\u5230\u786c\u76d8\u3002flush() \u65b9\u6cd5\u7684\u4f5c\u7528\u5c31\u662f\u5f3a\u5236\u547d\u4ee4 Java\uff1a\u201c\u522b\u7b49\u4e86\uff0c\u7acb\u523b\u628a\u7f13\u51b2\u533a\u91cc\u73b0\u6709\u7684\u6570\u636e\u5168\u90e8\u771f\u6b63\u5199\u5165\u5230\u7269\u7406\u6587\u4ef6\u4e2d\u201d\uff0c\u4ee5\u9632\u6b62\u7a0b\u5e8f\u7a81\u7136\u5d29\u6e83\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u3002<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">readObject<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>java.io.ObjectInputStream<\/strong>\u7c7b\u7684<strong>readObject<\/strong>\u65b9\u6cd5\u7528\u6765\u5bf9\u5e8f\u5217\u5316\u683c\u5f0f\u7684\u5b57\u8282\u6d41\u6570\u636e\u8fdb\u884c\u53cd\u5e8f\u5217\u5316<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff0c\u5c06\u672c\u5730\u6587\u4ef6\u4e2d\u7684\u5e8f\u5217\u5316\u6570\u636e\u53cd\u5e8f\u5217\u5316\u5f97\u5230Date\u5bf9\u8c61\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">FileOutputStream in = new FileInputStream(\"data.ser\");<br>ObjectInputStream s = new ObjectInputStream(in);<br>Date date = (Date)s.readObject();<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">\u7b2c\u4e00\u884c\uff1a<br>\u8fd9\u884c\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u6587\u4ef6\u5b57\u8282\u8f93\u5165\u6d41\u3002\u5b83\u4f1a\u53bb\u5f53\u524d\u76ee\u5f55\u4e0b\u5bfb\u627e\u4e4b\u524d\u4fdd\u5b58\u7684 data.ser \u6587\u4ef6\uff0c\u5e76\u6253\u5f00\u4e00\u6761\u8bfb\u53d6\u901a\u9053\u3002\u5982\u679c\u8fd9\u4e2a\u6587\u4ef6\u4e0d\u5b58\u5728\uff0cJava \u4f1a\u629b\u51fa FileNotFoundException \u5f02\u5e38\u3002\u6b64\u65f6\u7684 in \u53ea\u80fd\u987a\u7740\u7ba1\u9053\u8bfb\u53d6\u6700\u539f\u59cb\u7684 0 \u548c 1\uff08\u4e8c\u8fdb\u5236\u5b57\u8282\uff09\u3002<br>\u7b2c\u4e8c\u884c\uff1a<br>\u540c\u6837\u662f\u201c\u88c5\u9970\u5668\u6a21\u5f0f\u201d\u7684\u5e94\u7528\u3002\u6211\u4eec\u628a\u539f\u59cb\u7684 in \u4f20\u7ed9 ObjectInputStream \u5305\u88c5\u8d77\u6765\u3002\u8fd9\u6837\uff0cs \u5c31\u50cf\u5e26\u4e0a\u4e86\u4e00\u4e2a\u9ad8\u7ea7\u7ffb\u8bd1\u5668\uff0c\u62e5\u6709\u4e86\u628a\u6beb\u65e0\u610f\u4e49\u7684\u5b57\u8282\u7801\u6309\u7167 Java \u7684\u89c4\u5219\u91cd\u65b0\u62fc\u88c5\u6210\u590d\u6742\u5bf9\u8c61\u7684\u80fd\u529b\u3002<br>\u7b2c\u4e09\u884c\uff1a<br>readObject() \u662f\u53cd\u5e8f\u5217\u5316\u7684\u6838\u5fc3\u3002\u5b83\u4f1a\u4ece data.ser \u4e2d\u8bfb\u53d6\u5b57\u8282\u6570\u636e\uff0c\u5728\u5185\u5b58\u4e2d\u91cd\u65b0\u6784\u5efa\u51fa\u8fd9\u4e2a\u5bf9\u8c61\u3002<br>\u4e3a\u4ec0\u4e48\u9700\u8981 (Date) \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\uff1f \u56e0\u4e3a readObject() \u65b9\u6cd5\u4e0d\u77e5\u9053\u8bfb\u51fa\u6765\u7684\u662f\u4ec0\u4e48\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u5b83\u7684\u8fd4\u56de\u503c\u662f\u6240\u6709\u7c7b\u7684\u8001\u7956\u5b97 Object \u7c7b\u578b\u3002\u7531\u4e8e\u6211\u4eec\u660e\u786e\u77e5\u9053\u5b58\u8fdb\u53bb\u7684\u662f\u4e00\u4e2a\u65f6\u95f4\uff0c\u6240\u4ee5\u5fc5\u987b\u52a0\u4e0a (Date) \u5c06\u5b83\u5f3a\u5236\u8f6c\u6362\u56de\u539f\u5f62\uff0c\u5426\u5219\u65e0\u6cd5\u8c03\u7528 Date \u7c7b\u7684\u4e13\u5c5e\u65b9\u6cd5\u3002<br>\u6ce8\u610f\uff1a \u5982\u679c\u5728\u8bfb\u53d6\u65f6\uff0c\u5f53\u524d Java \u7a0b\u5e8f\u91cc\u627e\u4e0d\u5230 Date \u8fd9\u4e2a\u7c7b\u7684\u5b9a\u4e49\u6587\u4ef6\uff0c\u5b83\u4f1a\u629b\u51fa ClassNotFoundException \u5f02\u5e38\u3002<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u8981\u8fdb\u884c<strong>\u5e8f\u5217\u5316<\/strong>\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u5b83\u7684\u7c7b\u5b9a\u4e49\u4e86 <code>writeObject<\/code> \u65b9\u6cd5\uff0c\u90a3\u4e48\u5728\u8fd9\u4e2a\u5bf9\u8c61\u88ab<strong>\u5e8f\u5217\u5316<\/strong>\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8be5\u65b9\u6cd5\u4f1a\u88ab\u8c03\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u8981\u8fdb\u884c<strong>\u53cd\u5e8f\u5217\u5316<\/strong>\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u5b83\u7684\u7c7b\u5b9a\u4e49\u4e86 <code>readObject<\/code> \u65b9\u6cd5\uff0c\u90a3\u4e48\u5728\u8fd9\u4e2a\u5bf9\u8c61\u88ab<strong>\u53cd\u5e8f\u5217\u5316<\/strong>\u7684\u8fc7\u7a0b\u4e2d\uff0c\u8be5\u65b9\u6cd5\u4f1a\u88ab\u8c03\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u53e5\u8bdd\u63cf\u8ff0\u7684\u662f Java \u5e8f\u5217\u5316\u6846\u67b6\u63d0\u4f9b\u7684\u4e00\u4e2a\u201c\u540e\u95e8\u63a5\u53e3\u201d\u3002\u53ea\u8981\u4f60\u6309\u89c4\u77e9\u5728\u8fd9\u4e2a\u540e\u95e8\u91cc\u5199\u4e86\u4ee3\u7801\uff0cJava \u5c31\u4f1a\u628a\u5e8f\u5217\u5316\u7684\u63a7\u5236\u6743\u4ea4\u7ed9\u4f60\u3002\u5f53\u7136\uff0c\u6709\u5199\u5c31\u6709\u8bfb\uff0c\u901a\u5e38\u5199\u4e86\u81ea\u5b9a\u4e49\u7684 <code>writeObject<\/code>\uff0c\u4e5f\u4f1a\u5bf9\u5e94\u5730\u5199\u4e00\u4e2a <code>readObject<\/code> \u65b9\u6cd5\u6765\u628a\u52a0\u5bc6\u6216\u5904\u7406\u8fc7\u7684\u6570\u636e\u8fd8\u539f\u56de\u6765\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Java\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u539f\u7406<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53Java\u5e94\u7528\u7a0b\u5e8f\u5bf9\u6765\u81ea\u5916\u90e8\u8f93\u5165\u7684\u4e0d\u53ef\u4fe1\u6570\u636e\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u5904\u7406\u65f6\uff0c\u5c31\u5f62\u6210\u4e86\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">InputStream input = request.getInputStream();<br>ObjectInputStream ois = new ObjectInputrStream(input);<br>Object obj = ois.readObject();<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6bb5\u4ee3\u7801\u9996\u5148\u83b7\u53d6\u4e86HTTP\u8bf7\u6c42\u7684\u6570\u636e\u5305Body\u90e8\u5206\u7684\u5b57\u8282\u6d41\uff0c\u7136\u540e\u7528\u5b83\u6765\u6784\u9020ObjectInout-Steeam\u8f93\u5165\u6d41\uff0c\u6700\u540e\u8c03\u7528\u4e86readObject\u65b9\u6cd5\uff0c\u89e6\u53d1\u4e86\u53cd\u5e8f\u5217\u5316<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u4e8ehttp\u6570\u636e\u5305Body\u90e8\u5206\u4e00\u822c\u60c5\u51b5\u4e0b\u662f\u7528\u6237\u53ef\u64cd\u63a7\u7684\uff0c\u5c5e\u4e8e\u4e0d\u53ef\u4fe1\u6570\u636e\uff0c\u8fd9\u6bb5\u4ee3\u7801\u4e5f\u5c31\u5f62\u6210\u4e86\u4e00\u4e2a\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u8fd9\u4e2a\u7a0b\u5e8f\u4e2d\u6709\u8fd9\u6837\u4e00\u4e2a\u7c7b\uff0c\u8fd9\u4e2aDummy\u7c7b\u5728\u53cd\u5e8f\u5217\u5316\u65f6\uff0c\u4ece\u8f93\u5165\u6570\u636e\u6d41\u91cc\u89e3\u7801\u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u5c5e\u6027cmd\uff0c\u7136\u540e\u4ee5\u5c5e\u6027cmd\u7684\u503c\u4f5c\u4e3a\u7cfb\u7edf\u547d\u4ee4\u8fdb\u884c\u6267\u884c<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">import java.io.IOException;<br>import java.io.ObjectInputStream;<br>import java.io.ObjectOutputStream;<br>import java.io.Serializable;<br>\u200b<br>public class Dummy implements Serializable {<br> &nbsp;\/\/\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a Dummy\uff08\u901a\u5e38\u610f\u4e3a\u201c\u5047\u4eba\/\u5360\u4f4d\u7b26\u201d\uff0c\u5728\u5b89\u5168\u9886\u57df\u5e38\u7528\u6765\u6307\u4ee3\u6d4b\u8bd5\u7528\u7684\u6076\u610f\u7c7b\uff09\u7684\u516c\u5f00\u7c7b\u3002\u5b83\u5b9e\u73b0\u4e86 Serializable \u63a5\u53e3\uff0c\u610f\u5473\u7740\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\u53ef\u4ee5\u88ab\u6253\u5305\u6210\u5b57\u8282\u6d41\uff0c\u6216\u8005\u4ece\u5b57\u8282\u6d41\u4e2d\u8fd8\u539f\u3002<br>\u200b<br> &nbsp; &nbsp;private String cmd;<br> &nbsp;\/\/\u58f0\u660e\u4e86\u4e00\u4e2a\u79c1\u6709\u7684\u5b57\u7b26\u4e32\u53d8\u91cf cmd\uff08command\u7684\u7f29\u5199\uff09\u3002<br>\u200b<br> &nbsp; &nbsp;public Dummy(String cmd) {<br> &nbsp; &nbsp; &nbsp; &nbsp;this.cmd = cmd;<br> &nbsp;  }<br> &nbsp;\/\/\u6784\u9020\u51fd\u6570\u3002\u653b\u51fb\u8005\u5728\u521b\u5efa\u8fd9\u4e2a\u6076\u610f\u5bf9\u8c61\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b83\u628a\u60f3\u8981\u6267\u884c\u7684\u7cfb\u7edf\u547d\u4ee4\u585e\u8fdb cmd \u53d8\u91cf\u91cc\uff0c\u4f8b\u5982 new Dummy(\"\u8ba1\u7b97\u5668\u547d\u4ee4\")\u3002<br>\u200b<br> &nbsp; &nbsp;private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {<br> &nbsp; &nbsp; &nbsp; &nbsp;cmd = s.readUTF(); &nbsp;\/\/ \u8fd9\u91cc\u4ece\u8f93\u5165\u6570\u636e\u6d41\u91cc\u89e3\u7801\u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u5c5e\u6027 cmd<br> &nbsp; &nbsp; &nbsp; &nbsp;Runtime.getRuntime().exec(cmd); \/\/ \u8fd9\u662f Java \u4e2d\u7528\u6765\u76f4\u63a5\u6267\u884c\u5e95\u5c42\u64cd\u4f5c\u7cfb\u7edf\u547d\u4ee4\u7684\u65b9\u6cd5\uff0c\u4ee5cmd\u4f5c\u4e3a\u7cfb\u7edf\u547d\u4ee4\u8fdb\u884c\u6267\u884c<br> &nbsp;  }<br>\u200b<br> &nbsp; &nbsp;private void writeObject(ObjectOutputStream s) throws IOException {<br> &nbsp; &nbsp; &nbsp; &nbsp;s.writeUTF(cmd);<br> &nbsp;  }<br>}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u662f\u6076\u610f\u547d\u4ee4<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Dummy dummy = new Dummy(\"calc\");\/\/\u521b\u5efa\u4e86\u4e00\u4e2a Dummy \u7c7b\u7684\u5b9e\u4f8b\uff0c\u5e76\u5411\u5176\u6784\u9020\u51fd\u6570\u4f20\u5165\u4e86 \"calc\"\uff08Windows \u7cfb\u7edf\u4e0b\u7684\u8ba1\u7b97\u5668\u7a0b\u5e8f\uff09\u3002\u6b64\u65f6\uff0c\u8fd9\u4e2a\u5bf9\u8c61\u7684 cmd \u5c5e\u6027\u88ab\u8d4b\u503c\u4e3a\u4e86\u8981\u6267\u884c\u7684\u6076\u610f\u547d\u4ee4\u3002<br>ByteArrayOutputStream baos = new ByteArrayOutputStream();\/\/ByteArrayOutputStream\u4f5c\u7528\u662f\u5728\u5185\u5b58\u4e2d\u5f00\u8f9f\u4e00\u5757\u7a7a\u95f4\uff0c\u76f8\u5f53\u4e8e\u4e00\u4e2a\u201c\u865a\u62df\u6587\u4ef6\u201d\uff0c\u7a0d\u540e\u5e8f\u5217\u5316\u4ea7\u751f\u7684\u6240\u6709\u5b57\u8282\u6570\u636e\u90fd\u4f1a\u6682\u5b58\u5230\u8fd9\u4e2a\u5185\u5b58\u7f13\u51b2\u533a\u4e2d\u3002<br>ObjectOutputStream oos = new ObjectOutputStream(baos);\/\/\u5c06\u521a\u624d\u7684\u5185\u5b58\u5b57\u8282\u6d41\u4f20\u7ed9 ObjectOutputStream \u8fdb\u884c\u5305\u88c5\uff0c\u4f7f\u5176\u5177\u5907\u5c06 Java \u5bf9\u8c61\u8f6c\u6362\u4e3a\u5b57\u8282\u5e8f\u5217\u7684\u80fd\u529b\u3002<br>oos.writeObject(obj);\/\/\u8fd9\u662f\u6700\u5173\u952e\u7684\u4e00\u6b65\u3002\u5f53\u6267\u884c\u8fd9\u884c\u4ee3\u7801\u65f6\uff0cJava \u865a\u62df\u673a\u4f1a\u68c0\u67e5 Dummy \u7c7b\uff0c\u53d1\u73b0\u5b83\u81ea\u5b9a\u4e49\u4e86 writeObject \u65b9\u6cd5\uff0c\u4e8e\u662f\u8c03\u7528 Dummy \u7c7b\u4e2d\u81ea\u5b9a\u4e49\u7684\u903b\u8f91\uff0c\u5c06 \"calc\" \u8fd9\u4e2a\u5b57\u7b26\u4e32\u6309\u6307\u5b9a\u683c\u5f0f\u5199\u5165\u5230 baos \u7684\u5185\u5b58\u7f13\u51b2\u533a\u4e2d\u3002<br>byte[] evilbytes = baos.toByteArray();\/\/\u5c06\u5185\u5b58\u7f13\u51b2\u533a\u4e2d\u79ef\u7d2f\u7684\u6240\u6709\u5e8f\u5217\u5316\u540e\u7684\u5b57\u8282\u6570\u636e\uff0c\u4e00\u6b21\u6027\u63d0\u53d6\u51fa\u6765\uff0c\u8d4b\u503c\u7ed9 evilbytes \u6570\u7ec4\u3002<\/pre>\n\n\n\n<h1 class=\"wp-block-heading\">\u9ed1\u76d2\u6d4b\u8bd5\u548c\u767d\u76d2\u6d4b\u8bd5<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">\u9ed1\u76d2\u6d4b\u8bd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3b\u8981\u9760\u89c2\u5bdf\u901a\u4fe1\u6d41\u91cf\u6765\u786e\u5b9a\u5165\u53e3\u70b9\u3002\u9700\u8981\u5728\u76ee\u6807\u901a\u4fe1\u7684\u6d41\u91cf\u4e2d\u5bfb\u627eJava\u5e8f\u5217\u5316\u7279\u5f81\u5b57\u8282\u6216\u5b57\u7b26\u4e32 <strong>0xac ed 00 05<\/strong> (\u4e8c\u8fdb\u5236\u6570\u636e\u768416\u8fdb\u5236\u8868\u793a)\u6216<strong>rO0AB<\/strong>\uff08\u5bf9\u4e8c\u8fdb\u5236\u6570\u636ebase64\u7f16\u7801\u540e\u7684\u5b57\u7b26\u4e32\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e9b\u7279\u5f81\u5b57\u8282\u662fJava\u5e8f\u5217\u5316\u6570\u636e\u7684\u6807\u5fd7\u3002\u5177\u4f53\u6765\u8bf4\uff0c<strong>0xaced<\/strong>\u662f\u5e8f\u5217\u5316\u7684Magic Bytes,<strong>0x0005<\/strong>\u5219\u8868\u793a\u5e8f\u5217\u5316\u7684\u7248\u672c\u53f7\uff0c\u6d41\u91cf\u4e2d\u51fa\u73b0\u8fd9\u4e9b\u6807\u5fd7\u57fa\u672c\u53ef\u4ee5\u786e\u5b9a\u76ee\u6807\u4f1a\u5bf9\u4f20\u8f93\u7684\u5e8f\u5217\u5316\u6570\u636e\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u89e3\u6790\u5904\u7406<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u767d\u76d2\u6d4b\u8bd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u76f4\u63a5\u5728\u5e94\u7528\u4ee3\u7801\u91cc\u641c\u7d22\u662f\u5426\u51fa\u73b0readObject\u76f8\u5173\u65b9\u6cd5\u7684\u8c03\u7528\uff0c\u5982\u679c\u5b58\u5728\uff0c\u518d\u770b\u770b\u53cd\u5e8f\u5217\u5316\u7684\u8f93\u5165\u6570\u636e\u6d41\u6765\u6e90\u662f\u5426\u7528\u6237\u53ef\u63a7\uff0c\u82e5\u53ef\u63a7\u5219\u8bc1\u660e\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u5b58\u5728<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Java\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u5229\u7528<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Java\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u653b\u51fb\u7684\u96be\u70b9\u4e0d\u662f\u5982\u4f55\u53d1\u73b0\u800c\u662f\u5982\u4f55\u5229\u7528<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u6700\u7ec8\u5b8c\u6210\u6267\u884c\u5371\u9669\u64cd\u4f5c\u7684\u76ee\u7684\uff0c\u73b0\u5b9e\u4e16\u754c\u7684\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u5229\u7528\u653b\u51fb\u4e2d\uff0c\u5f80\u5f80\u9700\u8981\u7ec4\u5408\u591a\u4e2a\u4e0d\u540c\u7684Serialiabale\u63a5\u53e3\u5b9e\u73b0\u7c7b\u7684\u65b9\u6cd5\u8c03\u7528\uff0c\u5f62\u6210\u590d\u6742\u7684\u8c03\u7528\u94fe\uff0c\u6211\u4eec\u4e60\u60ef\u79f0\u4e4b\u4e3a\u53cd\u5e8f\u5217\u5316\u5229\u7528\u94fe\uff0c\u4e5f\u53ebGadget Chain<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u91cd\u70b9\u5173\u6ce8\u8fd9\u4e09\u7c7b\u4ee3\u7801\u6a21\u5f0f\uff1a<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u5371\u9669\u7684 <code>readObject()<\/code> \u91cd\u5199<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e1a\u52a1\u4ee3\u7801\u5982\u679c\u91cd\u5199\u4e86 <code>readObject()<\/code>\uff0c\u8fd9\u662f\u6700\u9ad8\u5371\u7684\u4fe1\u53f7\uff0c\u91cc\u9762\u5f88\u53ef\u80fd\u6709\u903b\u8f91\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">java<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\/\/ \u5371\u9669\u793a\u4f8b1\uff1a\u76f4\u63a5\u5bf9\u53cd\u5e8f\u5217\u5316\u6765\u7684\u5bf9\u8c61\u505a\u5371\u9669\u64cd\u4f5c<br>private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {<br> &nbsp;  in.defaultReadObject();<br> &nbsp;  \/\/ \u76f4\u63a5\u6267\u884c\u4e86\u4ece\u6d41\u4e2d\u6062\u590d\u7684Runnable\u5bf9\u8c61<br> &nbsp;  this.runnable.run(); <br>}<br>\u200b<br>\/\/ \u5371\u9669\u793a\u4f8b2\uff1a\u5c06\u53cd\u5e8f\u5217\u5316\u6570\u636e\u76f4\u63a5\u4f20\u5165\u5371\u9669\u65b9\u6cd5<br>private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {<br> &nbsp;  in.defaultReadObject();<br> &nbsp;  \/\/ \u5047\u8bbe\u5b58\u5728\u4e00\u4e2a\u547d\u4ee4\u6267\u884c\u65b9\u6cd5<br> &nbsp;  this.executor.execute(this.cmd); <br>}<br>\u200b<br>\/\/ \u5371\u9669\u793a\u4f8b3\uff1a\u5229\u7528\u6d41\u4e2d\u7684\u6570\u636e\u8c03\u7528\u53cd\u5c04<br>private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {<br> &nbsp;  in.defaultReadObject();<br> &nbsp;  \/\/ this.targetMethod \u548c this.targetObject \u90fd\u6765\u81ea\u5e8f\u5217\u5316\u6d41<br> &nbsp;  this.targetClass.getMethod(this.targetMethod).invoke(this.targetObject);<br>}<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5ba1\u8ba1\u6280\u5de7<\/strong>\uff1a\u5728 IDA \u6216 jadx \u4e2d\uff0c\u5bf9\u6240\u6709\u91cd\u5199\u4e86 <code>readObject<\/code> \u7684\u7c7b\u9010\u4e00\u6392\u67e5\uff0c\u770b\u91cc\u9762\u6709\u6ca1\u6709\u8c03\u7528\u4efb\u4f55\u4f20\u5165\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u6216\u8005\u5c06\u5b57\u6bb5\u4f20\u9012\u7ed9\u5371\u9669 sink\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u9690\u5f0f\u89e6\u53d1\u70b9\uff1aMap\/SortedSet \u63a5\u53e3\u7684\u201c\u81ea\u52a8\u8c03\u7528\u201d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u5728\u6ca1\u6709\u76f4\u63a5 Gadget \u65f6\uff0c\u6700\u5e38\u89c1\u7684\u624b\u5de5\u6784\u9020\u94fe\u65b9\u5f0f\u3002\u8bb8\u591a\u4e1a\u52a1\u903b\u8f91\u4f1a\u5728 <code>readObject<\/code> \u540e\uff0c\u5c06\u53cd\u5e8f\u5217\u5316\u51fa\u6765\u7684\u5bf9\u8c61\u653e\u5165\u4e00\u4e2a Map \u6216 SortedSet\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>hashCode() \/ equals() \u89e6\u53d1<\/strong> \u5982\u679c\u4e00\u4e2a <code>HashMap<\/code> \u88ab\u53cd\u5e8f\u5217\u5316\uff0c\u5b83\u4f1a\u91cd\u65b0\u8ba1\u7b97\u952e\u7684\u54c8\u5e0c\u503c\u5e76\u8fdb\u884c\u952e\u6bd4\u8f83\uff0c\u4ece\u800c<strong>\u81ea\u52a8\u8c03\u7528<\/strong>\u952e\u5bf9\u8c61\u7684 <code>hashCode()<\/code> \u548c <code>equals()<\/code> \u65b9\u6cd5\u3002\u5982\u679c\u4e1a\u52a1\u4ee3\u7801\u4e2d\u6709\u4e00\u4e2a\u7c7b\u7684 <code>hashCode()<\/code> \u65b9\u6cd5\u5199\u5f97\u6709\u95ee\u9898\uff0c\u5c31\u80fd\u88ab\u5229\u7528\u3002java\/\/ \u5ba1\u8ba1\u76ee\u6807\uff1a\u627e\u4e00\u4e2a\u53ef\u5e8f\u5217\u5316\u7684\u7c7b\uff0c\u5176hashCode\u6216equals\u65b9\u6cd5\u6709\u5371\u9669\u64cd\u4f5c<br>public class DangerousObject implements Serializable {<br>\u00a0 @Override<br>\u00a0 public int hashCode() {<br>\u00a0 \u00a0 \u00a0 \/\/ \u8fd9\u91cc\u5982\u679c\u8c03\u7528\u4e86\u5371\u9669\u65b9\u6cd5\uff0c\u5c31\u80fd\u901a\u8fc7HashMap\u89e6\u53d1<br>\u00a0 \u00a0 \u00a0 Runtime.getRuntime().exec(\"calc\");<br>\u00a0 \u00a0 \u00a0 return 1;<br>\u00a0 }<br>}<\/li>\n\n\n\n<li><strong>compareTo() \u89e6\u53d1<\/strong> \u540c\u7406\uff0c<code>TreeMap<\/code> \u6216 <code>TreeSet<\/code> \u5728\u53cd\u5e8f\u5217\u5316\u65f6\u4f1a\u8c03\u7528\u952e\/\u5143\u7d20\u7684 <code>compareTo()<\/code> \u65b9\u6cd5\u6765\u91cd\u5efa\u7ea2\u9ed1\u6811\u3002\u5982\u679c\u4e1a\u52a1\u4ee3\u7801\u4e2d\u4e00\u4e2a\u5b9e\u73b0\u4e86 <code>Comparable<\/code> \u7684\u7c7b\uff0c\u5176 <code>compareTo()<\/code> \u65b9\u6cd5\u5b58\u5728\u6f0f\u6d1e\uff0c\u4e5f\u80fd\u88ab\u89e6\u53d1\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5ba1\u8ba1\u6280\u5de7<\/strong>\uff1a\u641c\u7d22\u5b9e\u73b0\u4e86 <code>Serializable<\/code> \u548c <code>Comparable<\/code> \u7684\u7c7b\uff0c\u4ee5\u53ca\u91cd\u5199\u4e86 <code>hashCode<\/code> \/ <code>equals<\/code> \u7684\u7c7b\uff0c\u68c0\u67e5\u5176\u5b9e\u73b0\u903b\u8f91\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u7ec8\u6781 sink\uff1aJNDI \u6ce8\u5165\u4e0e\u7c7b\u52a0\u8f7d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e1a\u52a1\u903b\u8f91\u4e2d\u5bfb\u627e\u53ef\u4ee5\u89e6\u53d1\u7c7b\u52a0\u8f7d\u6216 JNDI \u67e5\u8be2\u7684\u201c\u540e\u95e8\u201d\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>JNDI \u6ce8\u5165<\/strong>\uff1a\u641c\u7d22 <code>InitialContext.lookup()<\/code> \u65b9\u6cd5\uff0c\u770b\u5176\u53c2\u6570\u662f\u5426\u53ef\u63a7\uff08\u76f4\u63a5\u6216\u95f4\u63a5\u6765\u81ea\u53cd\u5e8f\u5217\u5316\u5b57\u6bb5\uff09\u3002\u5373\u4f7f\u5728\u9ad8\u7248\u672c JDK\uff0c\u5982\u679c\u672c\u5730\u6709\u53ef\u7528\u7684 Gadget\uff0c\u4ecd\u53ef\u80fd\u5229\u7528\u3002\u5728\u4f4e\u7248\u672c JDK \u4e0b\u5219\u80fd\u76f4\u63a5\u7528\u4e8e\u8fdc\u7a0b\u52a0\u8f7d\u7c7b\u3002<\/li>\n\n\n\n<li><strong>\u7c7b\u52a0\u8f7d<\/strong>\uff1a\u5bfb\u627e <code>Class.forName()<\/code> \u6216 <code>URLClassLoader<\/code>\uff0c\u770b\u53c2\u6570\u80fd\u5426\u63a7\u5236\u3002<\/li>\n\n\n\n<li><strong>\u811a\u672c\u5f15\u64ce<\/strong>\uff1a\u5982\u679c\u6709 <code>ScriptEngine.eval()<\/code>\uff0c\u4e14\u811a\u672c\u5185\u5bb9\u6216\u5f15\u64ce\u540d\u53ef\u63a7\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u624b\u5de5\u7f16\u7ec7\u4e09\u6b65\u6cd5\uff1a<\/strong><\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u627e\u8d77\u59cb\u70b9<\/strong>\uff1a\u786e\u5b9a\u4e00\u4e2a\u4f1a\u5728\u53cd\u5e8f\u5217\u5316\u65f6\u81ea\u52a8\u6267\u884c\u7684\u65b9\u6cd5\u3002\n<ul class=\"wp-block-list\">\n<li><code>readObject()<\/code> \u5185\u7684\u76f4\u63a5\u8c03\u7528\u3002<\/li>\n\n\n\n<li><code>hashCode()<\/code> \/ <code>equals()<\/code> \/ <code>compareTo()<\/code> \u7b49\u95f4\u63a5\u8c03\u7528\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u627e\u8df3\u677f<\/strong>\uff1a\u8fde\u63a5\u8d77\u59cb\u70b9\u548c\u6700\u7ec8 sink \u7684\u4e2d\u95f4\u7c7b\u3002\n<ul class=\"wp-block-list\">\n<li><strong>\u52a8\u6001\u4ee3\u7406<\/strong>\uff1a\u901a\u5e38\u7528\u6765\u5c06\u4efb\u610f\u65b9\u6cd5\u8c03\u7528\u8def\u7531\u5230\u6307\u5b9a\u7c7b\u7684 <code>invoke()<\/code> \u65b9\u6cd5\u3002<\/li>\n\n\n\n<li><strong>\u53cd\u5c04\u8c03\u7528<\/strong>\uff1a<code>Method.invoke()<\/code> \u662f\u6838\u5fc3\uff0c\u53ef\u4ee5\u8ba9\u4f60\u8c03\u7528\u4efb\u610f\u65b9\u6cd5\u3002\u5982\u679c\u4e00\u4e2a\u7c7b\u7684 <code>hashCode()<\/code> \u91cc\u6070\u597d\u6709\u53cd\u5c04\u8c03\u7528\uff0c\u5b83\u5c31\u662f\u7edd\u4f73\u7684\u8df3\u677f\u3002<\/li>\n\n\n\n<li><strong>\u65b9\u6cd5\u5f15\u7528<\/strong>\uff1a<code>Consumer<\/code>\u3001<code>Supplier<\/code> \u7b49\u51fd\u6570\u5f0f\u63a5\u53e3\u4e5f\u53ef\u80fd\u88ab\u5229\u7528\u6765\u4f20\u9012\u8c03\u7528\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u627e\u7ec8\u70b9<\/strong>\uff1a\u6700\u7ec8\u6267\u884c\u547d\u4ee4\u7684\u7c7b\u3002\n<ul class=\"wp-block-list\">\n<li><strong>\u5371\u9669\u547d\u4ee4\u6267\u884c\u7c7b<\/strong>\uff1a\u5bfb\u627e\u6709\u6ca1\u6709\u7c7b\u4f3c <code>System.exec()<\/code> \u5c01\u88c5\u597d\u7684\u5de5\u5177\u7c7b\u3002<\/li>\n\n\n\n<li><strong>\u6587\u4ef6\u64cd\u4f5c\u7c7b<\/strong>\uff1a\u8bfb\u5199\u6587\u4ef6\u7684\u903b\u8f91\uff0c\u5982\u679c\u80fd\u63a7\u5236\u8def\u5f84\uff0c\u53ef\u80fd\u901a\u8fc7\u5199 SSH key\u3001\u8ba1\u5212\u4efb\u52a1\u7b49\u65b9\u5f0f\u95f4\u63a5\u6267\u884c\u547d\u4ee4\u3002<\/li>\n\n\n\n<li><strong>\u5199 webshell<\/strong>\uff1a\u5982\u679c\u76ee\u6807\u662f\u4e2a web \u5e94\u7528\uff0c\u5bfb\u627e\u80fd\u5199\u6587\u4ef6\u7684\u7c7b\uff0c\u76f4\u63a5\u5199\u4e00\u4e2a webshell \u5230 web \u76ee\u5f55\u4e0b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u5ba1\u8ba1\u51fa\uff1a <code>A.readObject()<\/code> -&gt; \u8c03\u7528\u4e86 <code>this.map.put(key, value)<\/code> <code>B.hashCode()<\/code> -&gt; \u8c03\u7528\u4e86 <code>Runtime.exec(this.cmd)<\/code> \u90a3\u4e48\u5229\u7528\u94fe\u5c31\u662f\uff1a\u5e8f\u5217\u5316\u4e00\u4e2a\u5305\u542b <code>B<\/code> \u5bf9\u8c61\u4f5c\u4e3a key \u7684 <code>HashMap<\/code>\uff0c\u628a <code>HashMap<\/code> \u8d4b\u7ed9 <code>A.map<\/code>\u3002\u5f53 <code>A<\/code> \u88ab\u53cd\u5e8f\u5217\u5316\u65f6\uff0c<code>put<\/code> \u64cd\u4f5c\u89e6\u53d1 <code>B.hashCode()<\/code>\uff0c\u4ece\u800c\u6267\u884c\u547d\u4ee4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u4e86\u5e38\u89c4\u7684\u547d\u4ee4\u6267\u884c\uff0c\u4e1a\u52a1\u7cfb\u7edf\u5f80\u5f80\u6709\u66f4\u76f4\u63a5\u7684\u7834\u574f\u6216\u63a7\u5236\u624b\u6bb5\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6570\u636e\u5e93\u64cd\u4f5c<\/strong>\uff1a\u627e <code>JdbcTemplate<\/code>\u3001<code>MyBatis<\/code> \u7684 Mapper \u63a5\u53e3\u3002\u5982\u679c\u80fd\u63a7\u5236 SQL \u6216\u53c2\u6570\uff0c\u76f4\u63a5\u901a\u8fc7\u6570\u636e\u5e93\u5199\u6587\u4ef6\u6216\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\u3002<\/li>\n\n\n\n<li><strong>RMI\/\u7f51\u7edc\u8bf7\u6c42<\/strong>\uff1a\u5bfb\u627e <code>HttpURLConnection<\/code>\u3001<code>RestTemplate<\/code>\u3001<code>RMI<\/code> \u8c03\u7528\u3002\u63a7\u5236 URL \u53ef\u505a SSRF\uff0c\u63a7\u5236 RMI \u53c2\u6570\u53ef\u80fd\u8fdb\u884c\u53cd\u5236\u3002<\/li>\n\n\n\n<li><strong>\u6d41\u7a0b\u63a7\u5236<\/strong>\uff1a\u6709\u4e9b\u7c7b\u80fd\u4fee\u6539\u4e1a\u52a1\u72b6\u6001\uff0c\u5982\u201c\u5ba1\u6279\u901a\u8fc7\u201d\u3001\u201c\u6743\u9650\u63d0\u5347\u201d\u3002\u6539\u53d8\u5bf9\u8c61\u72b6\u6001\u5c31\u7b49\u4e8e\u653b\u51fb\u6210\u529f\uff0c\u4e0d\u4e00\u5b9a\u8981 <code>exec<\/code>\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9e\u6218\u5de5\u5177\u4e0e\u6d41\u7a0b<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9759\u6001\u5206\u6790<\/strong>\uff1a\u7528 jadx \u6216 IDA Pro \u6253\u5f00 jar\/war \u5305\uff0c\u5168\u5c40\u641c\u7d22\u8fd9\u4e9b\u5173\u952e\u5b57\uff1a\n<ul class=\"wp-block-list\">\n<li><code>readObject<\/code><\/li>\n\n\n\n<li><code>Invoke<\/code> (\u53cd\u5c04)<\/li>\n\n\n\n<li><code>hashCode<\/code> \/ <code>equals<\/code> \/ <code>compareTo<\/code><\/li>\n\n\n\n<li><code>exec<\/code> \/ <code>lookup<\/code> \/ <code>forName<\/code> \/ <code>eval<\/code><\/li>\n\n\n\n<li><code>FileOutputStream<\/code> \/ <code>FileWriter<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u52a8\u6001\u9a8c\u8bc1<\/strong>\uff1a\u5728\u672c\u5730\u642d\u5efa\u8c03\u8bd5\u73af\u5883\uff0c\u7f16\u5199\u6d4b\u8bd5\u4ee3\u7801\u6765\u89e6\u53d1\u4f60\u53d1\u73b0\u7684\u7c7b\u548c\u65b9\u6cd5\u3002javapublic class ExploitTest {<br>\u00a0 public static void main(String[] args) {<br>\u00a0 \u00a0 \u00a0 \/\/ \u5b9e\u4f8b\u5316\u4f60\u627e\u5230\u7684\u53ef\u7591\u7c7b<br>\u00a0 \u00a0 \u00a0 MyDangerousObject obj = new MyDangerousObject();<br>\u00a0 \u00a0 \u00a0 obj.setCmd(\"touch \/tmp\/pwned\");<br>\u00a0 \u00a0 \u00a0 \u00a0<br>\u00a0 \u00a0 \u00a0 \/\/ \u6a21\u62df\u53cd\u5e8f\u5217\u5316\u89e6\u53d1\u903b\u8f91\uff0c\u770b\u6548\u679c<br>\u00a0 \u00a0 \u00a0 HashMap map = new HashMap();<br>\u00a0 \u00a0 \u00a0 map.put(obj, \"test\"); \/\/ \u89c2\u5bdf\u662f\u5426\u4f1a\u89e6\u53d1obj.hashCode()<br>\u00a0 }<br>}<\/li>\n\n\n\n<li><strong>\u5b9a\u5236 Payload<\/strong>\uff1a\u4e00\u65e6\u94fe\u8dd1\u901a\uff0c\u81ea\u5df1\u5199\u4e00\u4e2a Java \u7a0b\u5e8f\uff0c\u751f\u6210\u5e8f\u5217\u5316 payload\u3002java\/\/ \u751f\u6210payload\u7684\u4ee3\u7801<br>FileOutputStream fos = new FileOutputStream(\"payload.ser\");<br>ObjectOutputStream oos = new ObjectOutputStream(fos);<br>oos.writeObject(yourCraftedObject); \/\/ \u8fd9\u91cc\u653e\u5165\u4f60\u6784\u9020\u597d\u7684\u5bf9\u8c61<br>oos.close();<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\uff1f \u53cd\u5e8f\u5217\u5316\u7684\u672c\u8d28\u5176\u5b9e\u662f\u4ee3\u7801\u7684\u94fe\u5f0f\u53cd\u5e94 \u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u662f\u6307\u7a0b\u5e8f\u5728\u53cd\u5e8f\u5217\u5316\u671f\u95f4\u901a\u8fc7\u7279\u6b8a\u7684\u8c03\u7528\u94fe\u5f15\u53d1\u7684\u4e00\u7cfb\u5217\u5b89\u5168\u95ee\u9898\uff0c &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[10,7],"tags":[],"class_list":["post-103","post","type-post","status-publish","format-standard","hentry","category-web","category-7"],"_links":{"self":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts\/103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/comments?post=103"}],"version-history":[{"count":1,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts\/103\/revisions"}],"predecessor-version":[{"id":104,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/posts\/103\/revisions\/104"}],"wp:attachment":[{"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/media?parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/categories?post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/reverier.cn\/index.php\/wp-json\/wp\/v2\/tags?post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}