Title

There must be no shosts.equiv files on the Ubuntu operating system. (Cat I impact)

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

Additional Identifiers

Rule ID: SV-214975r610931_rule

Vulnerability ID: V-214975

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.