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V-261341

CAT II (Medium)

SLEM 5 SSH daemon must perform strict mode checking of home directory configuration files.

Rule ID

SV-261341r996486_rule

STIG

SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide

Version

V1R4

CCIs

CCI-000366

Discussion

If other users have access to modify user-specific SSH configuration files, they may be able to log on to the system as another user.

Check Content

Verify SLEM 5 SSH daemon performs strict mode checking of home directory configuration files with the following command:

     > sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*strictmodes'
     /etc/ssh/sshd_config:StrictModes yes

If "StrictModes" is not set to "yes", is commented out, missing, or conflicting results are returned, this is a finding.

Fix Text

Configure SLEM 5 SSH daemon performs strict mode checking of home directory configuration files.

Add or modify the following line in the "/etc/ssh/sshd_config" file:

StrictModes yes

Restart the SSH daemon in order for the changes to take effect:

     > sudo systemctl restart sshd.service