2.2.35 Unable to register an Oracle Linux guest with ULN

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

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

You can then re-run the uln_register command. (Bug ID 14696776)