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: