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UBTU-22-611055 Ubuntu 22.04 LTS must store only encrypted representations of passwords.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to IA-5(1) via CCI-004062, CCI-000196

Title

Ubuntu 22.04 LTS must store only encrypted representations of passwords.

Control

Verify the Ubuntu operating stores only encrypted representations of passwords with the following command: $ grep pam_unix.so /etc/pam.d/common-password password [success=1 default=ignore] pam_unix.so obscure sha512 shadow rounds=100000 If "sha512" is missing from the "pam_unix.so" line, or if the "rounds" is set to less than 100000, this is a finding.

Discussion

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.

Related controls

CCI-000196, CCI-004062

Fix

Configure Ubuntu 22.04 LTS to store encrypted representations of passwords. Add or modify the following line in the "/etc/pam.d/common-password" file: password [success=1 default=ignore] pam_unix.so obscure sha512 shadow rounds=100000