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

An XCCDF Rule

Description

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

ID
SV-269299r1050181_rule
Version
ALMA-09-024770
Severity
Medium
References
Updated

Remediation Templates

A Manual Procedure

To configure the SSH daemon to perform strict mode checking of home directory configuration files, add or modify the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes":

StrictModes yes

Alternatively, add the setting to an include file if the line "Include /etc/ssh/sshd_config.d/*.conf" is found at the top of the "/etc/ssh/sshd_config" file: