UBTU-20-010070 - The Ubuntu operating system must prohibit password reuse for a minimum of five generations.

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Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements.

Satisfies: SRG-OS-000077-GPOS-00045, SRG-OS-000073-GPOS-00041


Configure the Ubuntu operating system to prevent passwords from being reused for a minimum of five generations.

Add or modify the 'remember' parameter value to the following line in '/etc/pam.d/common-password' file:

password [success=1 default=ignore] pam_unix.so obsecure sha512 shadow remember=5 rounds=5000

See Also


Item Details

References: CAT|III, CCI|CCI-000196, CCI|CCI-000200, Rule-ID|SV-238234r685225_rule, STIG-ID|UBTU-20-010070, Vuln-ID|V-238234

Plugin: Unix

Control ID: a906d5ad5150bc781f5ac0ee25d85d45d756717362072150bf615549be762edd