Finding ID | Version | Rule ID | IA Controls | Severity |
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V-38501 | RHEL-06-000357 | SV-50302r4_rule | Medium |
Description |
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Locking out user accounts after a number of incorrect attempts within a specific period of time prevents direct password guessing attacks. |
STIG | Date |
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Red Hat Enterprise Linux 6 Security Technical Implementation Guide | 2018-11-28 |
Check Text ( C-46058r2_chk ) |
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To ensure the failed password attempt policy is configured correctly, run the following command: $ grep pam_faillock /etc/pam.d/system-auth /etc/pam.d/password-auth For each file, the output should show "fail_interval= |
Fix Text (F-43448r6_fix) |
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Utilizing "pam_faillock.so", the "fail_interval" directive configures the system to lock out accounts after a number of incorrect logon attempts. Modify the content of both "/etc/pam.d/system-auth" and "/etc/pam.d/password-auth" as follows: Add the following line immediately before the "pam_unix.so" statement in the "AUTH" section: auth required pam_faillock.so preauth silent deny=3 unlock_time=604800 fail_interval=900 Add the following line immediately after the "pam_unix.so" statement in the "AUTH" section: auth [default=die] pam_faillock.so authfail deny=3 unlock_time=604800 fail_interval=900 Add the following line immediately before the "pam_unix.so" statement in the "ACCOUNT" section: account required pam_faillock.so Note that any updates made to "/etc/pam.d/system-auth" and "/etc/pam.d/password-auth" may be overwritten by the "authconfig" program. The "authconfig" program should not be used. |