Details

By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.

Satisfies: SRG-OS-000021-GPOS-00005, SRG-OS-000329-GPOS-00128

Solution

Open /etc/pam.d/system-auth with a text editor.

Add the following line after the last auth statement:

auth required pam_tally2.so file=/var/log/tallylog deny=3 onerr=fail even_deny_root unlock_time=86400 root_unlock_time=300

Supportive Information

The following resource is also helpful.

• https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_6-7_STIG.zip

This security hardening control applies to the following category of controls within NIST 800-53: Access Control.This control applies to the following type of system Unix.

References

• 800-53|AC-7a.
• 800-53|AC-7b.
• CAT|II
• CCI|CCI-000044
• CCI|CCI-002238
• Rule-ID|SV-239074r675030_rule
• STIG-ID|PHTN-67-000002
• Vuln-ID|V-239074

Source

• Tenable.com/audits