Detections
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UBTU-20-010070 - The Ubuntu operating system must prohibit password reuse for a minimum of five generations.
Warning! Audit Deprecated
This audit has been deprecated and will be removed in a future update.
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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
Solution
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
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CAN_Ubuntu_20-04_LTS_V1R1_STIG.zip
Item Details
Audit Name: DISA STIG Ubuntu 20.04 LTS v1r1
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