Mine supports USB (that module isn't FOSS, hence why it's ommited frequently - weird, as this isn't Debian!). I'm pretty sure I didn't download a .deb from Oracle, I think either there's an extra package containing it, or you install it as an extension from within VB itself. Been a while though, can't quite remember.....
You could mount them in the host, then share them to the guest, but that's just moving further from the point
Edit: Might be a different repo come to think of it, can't check till I get home unfortunatly..
Edit 2: By the look of this (https://www.virtualbox.org/wiki/Downloads
), I just used the default version found in the Mint/Ubuntu repos, then downloaded the extension pack