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V-215304

CAT II (Medium)

The AIX SSH daemon must be configured to not use host-based authentication.

Rule ID

SV-215304r991591_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000366

Discussion

SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.

Check Content

Check the SSH daemon configuration for allowed host-based authentication using command: 

# grep -i HostbasedAuthentication /etc/ssh/sshd_config | grep -v '^#'
HostbasedAuthentication no

If no lines are returned, or the returned "HostbasedAuthentication" directive contains "yes", this is a finding.

Fix Text

Edit "/etc/ssh/sshd_config" and add or update the "HostbasedAuthentication" line as:
HostbasedAuthentication  no

Save the change and restart ssh daemon:
# stopsrc -s sshd
# startsrc -s sshd