Apple today released MacBook Pro Retina EFI Update v1.3.
This update is recommended for MacBook Pro (Retina, 13-inch, late 2013) models.
MacBook Pro Retina EFI Update v1.3 addresses an issue where the built-in keyboard and Multi-Touch trackpad may become unresponsive.
The update is available vis Software Update and also as a standalone installer.
More info and download link here.