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RHEL-09-255035 - RHEL 9 SSHD must accept public key authentication.

Information

Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. A DOD common access card (CAC) with DOD-approved PKI is an example of multifactor authentication.

Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055

Solution

To configure the system, add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d".

PubkeyAuthentication yes

Restart the SSH daemon for the settings to take effect:

$ sudo systemctl restart sshd.service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R8_STIG.zip

Item Details

Category: IDENTIFICATION AND AUTHENTICATION

References: 800-53|IA-2(1), 800-53|IA-2(2), 800-53|IA-2(3), 800-53|IA-2(4), CAT|II, CCI|CCI-000765, CCI|CCI-000766, CCI|CCI-000767, CCI|CCI-000768, Rule-ID|SV-257983r1045024_rule, STIG-ID|RHEL-09-255035, Vuln-ID|V-257983

Plugin: Unix

Control ID: 98aeeb0cc0142f56f213c7b53d27bca1c5f52ddd2c48d77a30b526aeeab86343