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UBTU-22-611030 Ubuntu 22.04 LTS must prevent the use of dictionary words for passwords.

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

Maps to CM-6 via CCI-000366

Title

Ubuntu 22.04 LTS must prevent the use of dictionary words for passwords.

Control

Verify Ubuntu 22.04 LTS prevents the use of dictionary words for passwords by using the following command: $ grep -i dictcheck /etc/security/pwquality.conf dictcheck = 1 If "dictcheck" is not set to "1", is commented out, or is missing, this is a finding.

Discussion

If Ubuntu 22.04 LTS allows the user to select passwords based on dictionary words, then this increases the chances of password compromise by increasing the opportunity for successful guesses and brute-force attacks.

Related controls

CCI-000366

Fix

Configure Ubuntu 22.04 LTS to prevent the use of dictionary words for passwords. Add or modify the following line in the "/etc/security/pwquality.conf" file: dictcheck = 1