STIGQter: STIG Summary: Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide Version: 1 Release: 6 Benchmark Date: 01 Jul 2026:

Ubuntu 24.04 LTS must store only encrypted representations of passwords.

DISA Rule

SV-270725r1101789_rule

Vulnerability Number

V-270725

Group Title

SRG-OS-000073-GPOS-00041

Rule Version

UBTU-24-400220

Severity

CAT II

CCI(s)

• CCI-004062 - For password-based authentication, store passwords using an approved salted key derivation function, preferably using a keyed hash.

Weight

10

Fix Recommendation

Configure Ubuntu 24.04 LTS to store encrypted representations of passwords.

Add or modify the "sha512" parameter value to the following line in "/etc/pam.d/common-password" file:

password [success=1 default=ignore] pam_unix.so obscure sha512 shadow rounds=100000

Check Contents

Verify the Ubuntu operating system 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.

Vulnerability Number

V-270725

Documentable

False

Rule Version

UBTU-24-400220

Severity Override Guidance

Verify the Ubuntu operating system 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.

Check Content Reference

M

Target Key

5673