Ouch, thats bad :) C12.22 is pretty old, AES didn't even exist yet. It seems that it got an update recently (2011) with the smart grid and smart metering use case in mind. The are now using an EAX called EAX prime [1] put it seems to have it's own issues [2].
[1] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/propose... [2] http://eprint.iacr.org/2012/018.pdf