← Back to IBM AIX 7.x Security Technical Implementation Guide

V-215305

CAT II (Medium)

The AIX SSH daemon must not allow RhostsRSAAuthentication.

Rule ID

SV-215305r991591_rule

STIG

IBM AIX 7.x Security Technical Implementation Guide

Version

V3R2

CCIs

CCI-000366

Discussion

If SSH permits rhosts RSA authentication, a user may be able to log in based on the keys of the host originating the request and not any user-specific authentication.

Check Content

Check the SSH daemon configuration for the "RhostsRSAAuthentication" setting by running: 
# grep -i RhostsRSAAuthentication /etc/ssh/sshd_config | grep -v '^#' 

The above command should yield the following output:
RhostsRSAAuthentication no

If the setting is present and set to "yes", this is a finding.

Fix Text

Edit the "/etc/ssh/sshd_config file", add the following line, and save the change:
RhostsRSAAuthentication no

Restart the SSH daemon:
# stopsrc -s sshd
# startsrc -s sshd