seems hacked, SSH root access denied

Hi

I got a box which is CentOS 3.5 with kernel 2.4.21

yesterday, box seems hacked as I could not root in even normal user could not SSH in

DC has tried to uninstall/reinstall SSH for me, but no works

We are actually clueless and what DC can do is a OS restore

We can not check anything since we got no access to SSH at all.

have you guys met this before? any bugs /security holes report lately?

please kindly help

Thanks a lot

 

 

 

 

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