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PHTN-40-000221 - The Photon operating system must configure Secure Shell (SSH) to restrict LoginGraceTime.

Information

By default, SSH unauthenticated connections are left open for two minutes before being closed. This setting is too permissive as no legitimate login would need such an amount of time to complete a login. Quickly terminating idle or incomplete login attempts will free up resources and reduce the exposure any partial logon attempts may create.

Solution

Navigate to and open:

/etc/ssh/sshd_config

Ensure the "LoginGraceTime" line is uncommented and set to the following:

LoginGraceTime 30

At the command line, run the following command:

# systemctl restart sshd.service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_8-0_Y24M08_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-258884r991589_rule, STIG-ID|PHTN-40-000221, Vuln-ID|V-258884

Plugin: Unix

Control ID: 76f291577d190f5fede01067cbcaa08776bb19c0bf47df41ebebecd5f65f2657