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1.328 RHEL-10-700560

Information

RHEL 10 must be configured so that the Secure Shell (SSH) daemon performs strict mode checking of home directory configuration files.

GROUP ID: V-281259RULE ID: SV-281259r1184759

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

OpenSSH uses the first occurrence of a keyword it sees, and drop-in files are read in lexicographical order at the start of the configuration. Red Hat recommends using drop-in files rather than changing base configuration files.

Solution

Configure RHEL 10 SSH daemons to perform strict mode checking of home directory configuration files.

In "/etc/ssh/sshd_config.d", create a drop file that will lexicographically precede 50-redhat.conf and add the following line:

StrictModes yes

Restart the SSH service with the following command for the changes to take effect:

$ sudo systemctl restart sshd.service

See Also

https://workbench.cisecurity.org/benchmarks/26403

Item Details

Category: SYSTEM AND INFORMATION INTEGRITY

References: 800-53|SI-6a., CAT|II, CCI|CCI-002696, Rule-ID|SV-281259r1184759_rule, STIG-ID|RHEL-10-700560, Vuln-ID|V-281259

Plugin: Unix

Control ID: 3274cf5c5c9fdcdab8a9a098a18760d8608f880c5bb0925443e6c453573f9728