UBTU-18-010108 - The Ubuntu operating system must prohibit password reuse for a minimum of five generations.


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.


Configure the Ubuntu operating system prevents 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 sha512 shadow remember=5 rounds=5000

See Also


Item Details

References: CAT|III, CCI|CCI-000200, Rule-ID|SV-219180r610963_rule, STIG-ID|UBTU-18-010108, STIG-Legacy|SV-109691, STIG-Legacy|V-100587, Vuln-ID|V-219180

Plugin: Unix

Control ID: 94130327fecd94448125718f6e0a94720fcb8349266c311d784aa8ef62b35bd0