The Register: The NetCAT is out of the bag: Intel chipset exploited to sniff SSH
 passwords as they're typed over the network.
[1]https://www.theregister.co.uk/2019/09/10/intel_netcat_side_channel_attack/

References

   1. https://www.theregister.co.uk/2019/09/10/intel_netcat_side_channel_attack/