Finding ID | Version | Rule ID | IA Controls | Severity |
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V-38658 | RHEL-06-000274 | SV-50459r5_rule | Medium |
Description |
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Preventing reuse of previous passwords helps ensure that a compromised password is not reused by a user. |
STIG | Date |
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Red Hat Enterprise Linux 6 Security Technical Implementation Guide | 2017-05-19 |
Check Text ( C-46219r5_chk ) |
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To verify the password reuse setting is compliant, run the following command: # grep remember /etc/pam.d/system-auth The output must be a line beginning with "password required pam_pwhistory.so" or "password requisite pam_pwhistory.so" and end with "remember=5". If the line is commented out, the line does not contain the specified elements, or the value for "remember" is less than 5, this is a finding. |
Fix Text (F-43608r5_fix) |
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Do not allow users to reuse recent passwords. This can be accomplished by using the "remember" option for the "pam_pwhistory" PAM module. In the file "/etc/pam.d/system-auth", append "remember=5" to the line which refers to the "pam_pwhistory.so" module, as shown: password required pam_pwhistory.so [existing_options] remember=5 or password requisite pam_pwhistory.so [existing_options] remember=5 The DoD requirement is five passwords. |