Detections
Analytics
ALMA-09-007830 - AlmaLinux OS 9 must configure the use of the pam_faillock.so module in the /etc/pam.d/system-auth file.
Information
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.If the pam_faillock.so module is not loaded, the system will not correctly lockout accounts to prevent password guessing attacks.
Solution
Configure AlmaLinux OS 9 to include the use of the pam_faillock.so module in the /etc/pam.d/system-auth file.Add/modify the appropriate sections of the "/etc/pam.d/system-auth" file to match the following lines, ensuring that the "preauth" line is listed before pam_unix.so.
auth required pam_faillock.so preauth
auth required pam_faillock.so authfail
account required pam_faillock.so
Note: Do not simply copy these three lines into the file; their location/order is important.
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CL_AlmaLinux_OS_9_V1R6_STIG.zip
Item Details
Audit Name: DISA Cloud Linux AlmaLinux OS 9 STIG v1r6
Category: ACCESS CONTROL
References: 800-53|AC-7a., CAT|II, CCI|CCI-000044, Rule-ID|SV-269150r1050032_rule, STIG-ID|ALMA-09-007830, Vuln-ID|V-269150
Plugin: Unix
Control ID: 81e05173ddf8fff3e5ad961a3b8e8d22942ff7196dfe29927f4986cf5a22498f