There must be no shosts.equiv files on the Ubuntu operating system.

From Canonical Ubuntu 16.04 Security Technical Implementation Guide

Associated with: CCI-000366

SV-90181r2_rule There must be no shosts.equiv files on the Ubuntu operating system.

Vulnerability discussion

The shosts.equiv files are used to configure host-based authentication for the system via SSH. Host-based authentication is not sufficient for preventing unauthorized access to the system, as it does not require interactive identification and authentication of a connection request, or for the use of two-factor authentication.

Check content

Verify there are no "shosts.equiv" files on the Ubuntu operating system. Check for the existence of these files with the following command: # find / -name shosts.equiv If a "shosts.equiv" file is found, this is a finding.

Fix text

Remove any found "shosts.equiv" files from the Ubuntu operating system. # rm /etc/ssh/shosts.equiv

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