2.2.38 Unable to Register Oracle Linux Guest with ULN

Registering an Oracle Linux guest running under Virtual Box with the Unbreakable Linux Network (ULN) might fail with a server communication error. The workaround is to run the following command as root on the guest:

# echo "uuid=`uuidgen -t`" >> /etc/sysconfig/rhn/up2date

You can then run uln_register again. (Bug ID 14696776)