Which one have more vulnerability history, SSH or OpenSSH ?

[chumma chumma <ammavanayi () yahoo co in>]

Hi,
 
I would like to use openssh over commercial ssh. Which
one has more security problems in the past? Some in my
IT department claim that openssh is more unsecure bcoz
it had more problems? Is it true? Or is it something
in the long past.
 
Thanks
Joseph

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