java.rmi.ServerError Java Examples

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

/**
 * Wraps an exception thrown by an implementation
 * method.  It returns the corresponding client-side exception.
 * @param orig the exception to wrap.
 * @return the wrapped exception.
 */
public RemoteException wrapException(Throwable orig)
{
    if (orig instanceof SystemException) {
        return mapSystemException((SystemException)orig);
    }

    if (orig instanceof Error) {
        return new ServerError("Error occurred in server thread",(Error)orig);
    } else if (orig instanceof RemoteException) {
        return new ServerException("RemoteException occurred in server thread",
                                   (Exception)orig);
    } else if (orig instanceof RuntimeException) {
        throw (RuntimeException) orig;
    }

    if (orig instanceof Exception)
        return new UnexpectedException( orig.toString(), (Exception)orig );
    else
        return new UnexpectedException( orig.toString());
}
 

@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
  if (method.getDeclaringClass() == Object.class) {
    return method.invoke(myRemote, args);
  }
  else {
    Method m = getOrCreateRemoteToLocal(new AbstractMap.SimpleEntry<Class<?>, Class<?>>(myRemote.getClass(), myClazz)).get(method);
    if (m == null) throw new NoSuchMethodError(method.getName() + " in " + myRemote.getClass());
    try {
      return handleRemoteResult(m.invoke(myRemote, args), method.getReturnType(), myLoader, false);
    }
    catch (InvocationTargetException e) {
      Throwable cause = e.getCause(); // root cause may go deeper than we need, so leave it like this
      if (cause instanceof ServerError) cause = cause.getCause() == null ? cause : cause.getCause();
      if (cause instanceof RuntimeException) throw cause;
      if (cause instanceof Error) throw cause;
      if (canThrow(cause, method)) throw cause;
      throw new RuntimeException(cause);
    }
  }
}
 

/*******************
 * Helper method which checks exceptions triggered by a deserialization
 * attacks and attempts to provide additional output to guide the user.
 * 
 * If a ServerException was caused by a ClassNotFoundException then we can
 * safely assume that the chosen gadget chain is not available on the
 * server.
 * 
 * If a ServerError was caused by an IOException which has "Cannot run
 * program" in the message then we can safely assume that the chosen gadget
 * chain is present, but the command wasn't available.
 * 
 * @param ex 
 ******************/
protected final void checkDeserException(Throwable t) {
	boolean responded = false;
	
	//Check for server-side ClassNotFoundException, indicating that the payload is no use
	if(t instanceof ServerException) {
		while(t.getCause() != null) {
			t = t.getCause();
			if(t instanceof ClassNotFoundException) {
				System.out.println("\n[-] The chosen deserialization payload is not available at the server side.");
				responded = true;
				break;
			}
		}
	}
	
	//Check for server-side IOException saying that the program could not be run, indicating a successful attack but unavailable target program
	if(t instanceof ServerError) {
		while(t.getCause() != null) {
			t = t.getCause();
			if(t instanceof IOException && t.getMessage().contains("Cannot run program")) {
				System.out.println("\n[+] The attack was successful, however the chosen command was not available.");
				responded = true;
				break;
			}
		}
	}
	
	//Print generic response if we can't work anything out from the exception
	if(responded == false) {
		System.out.println("\n[~] Attack completed but success could not be verified.");
	}
}