diff options
Diffstat (limited to 'sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ReflectiveCall.kt')
| -rw-r--r-- | sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ReflectiveCall.kt | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ReflectiveCall.kt b/sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ReflectiveCall.kt index 7842d879..0fcabe36 100644 --- a/sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ReflectiveCall.kt +++ b/sanitizers/src/main/java/com/code_intelligence/jazzer/sanitizers/ReflectiveCall.kt @@ -14,21 +14,59 @@ package com.code_intelligence.jazzer.sanitizers +import com.code_intelligence.jazzer.api.FuzzerSecurityIssueHigh import com.code_intelligence.jazzer.api.HookType import com.code_intelligence.jazzer.api.Jazzer import com.code_intelligence.jazzer.api.MethodHook +import com.code_intelligence.jazzer.api.MethodHooks import java.lang.invoke.MethodHandle /** - * Detects unsafe reflective calls that lead to attacker-controlled method calls. + * Detects unsafe calls that lead to attacker-controlled class loading. + * + * Guide the fuzzer to load honeypot class via [Class.forName] or [ClassLoader.loadClass]. */ -@Suppress("unused_parameter") +@Suppress("unused_parameter", "unused") object ReflectiveCall { - @MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.Class", targetMethod = "forName") + @MethodHooks( + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.Class", targetMethod = "forName", targetMethodDescriptor = "(Ljava/lang/String;)Ljava/lang/Class;"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.Class", targetMethod = "forName", targetMethodDescriptor = "(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.ClassLoader", targetMethod = "loadClass", targetMethodDescriptor = "(Ljava/lang/String;)Ljava/lang/Class;"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.ClassLoader", targetMethod = "loadClass", targetMethodDescriptor = "(Ljava/lang/String;Z)Ljava/lang/Class;"), + ) @JvmStatic - fun classForNameHook(method: MethodHandle?, alwaysNull: Any?, args: Array<Any?>, hookId: Int) { + fun loadClassHook(method: MethodHandle?, alwaysNull: Any?, args: Array<Any?>, hookId: Int) { val className = args[0] as? String ?: return Jazzer.guideTowardsEquality(className, HONEYPOT_CLASS_NAME, hookId) } + + @MethodHooks( + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.Class", targetMethod = "forName", targetMethodDescriptor = "(Ljava/lang/Module;Ljava/lang/String;)Ljava/lang/Class;"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.ClassLoader", targetMethod = "loadClass", targetMethodDescriptor = "(Ljava/lang/Module;Ljava/lang/String;)Ljava/lang/Class;"), + ) + @JvmStatic + fun loadClassWithModuleHook(method: MethodHandle?, alwaysNull: Any?, args: Array<Any?>, hookId: Int) { + val className = args[1] as? String ?: return + Jazzer.guideTowardsEquality(className, HONEYPOT_CLASS_NAME, hookId) + } + + @MethodHooks( + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.Runtime", targetMethod = "load"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.Runtime", targetMethod = "loadLibrary"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.System", targetMethod = "load"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.System", targetMethod = "loadLibrary"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.System", targetMethod = "mapLibraryName"), + MethodHook(type = HookType.BEFORE, targetClassName = "java.lang.ClassLoader", targetMethod = "findLibrary"), + ) + @JvmStatic + fun loadLibraryHook(method: MethodHandle?, alwaysNull: Any?, args: Array<Any?>, hookId: Int) { + val libraryName = args[0] as? String ?: return + if (libraryName == HONEYPOT_LIBRARY_NAME) { + Jazzer.reportFindingFromHook( + FuzzerSecurityIssueHigh("load arbitrary library") + ) + } + Jazzer.guideTowardsEquality(libraryName, HONEYPOT_LIBRARY_NAME, hookId) + } } |