is this a Openssh/ssh "Uselogin" exploit - hack attempt

Hi All I would just like check what the following message log entries are the result of some one trying the Openssh/ssh "Uselogin" exploit. Feb 14 11:37:30 bobedb01 login(pam_unix)[1010]: check pass; user unknown Feb 14 11:37:30 bobedb01 login(pam_unix)[1010]: authentication failure; logname=LOGIN uid=0 euid=0 tty=tty1 ruser= rhost= Feb 14 11:37:32 bobedb01 login[1010]: FAILED LOGIN 1 FROM (null) FOR control, Authentication failure Feb 14 11:37:51 bobedb01 login(pam_unix)[1010]: check pass; user unknown Feb 14 11:37:53 bobedb01 login[1010]: FAILED LOGIN 2 FROM (null) FOR control, Authentication failure Thanks in Advance Steven