STIGQter STIGQter: STIG Summary: Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The Ubuntu operating system must prohibit password reuse for a minimum of five generations.

DISA Rule

SV-219180r610963_rule

Vulnerability Number

V-219180

Group Title

SRG-OS-000077-GPOS-00045

Rule Version

UBTU-18-010108

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

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

Check Contents

Verify that the Ubuntu operating system prevents passwords from being reused for a minimum of five generations by running the following command:

# grep -i remember /etc/pam.d/common-password

password [success=1 default=ignore] pam_unix.so sha512 shadow remember=5 rounds=5000

If the "remember" parameter value is not greater than or equal to 5, commented out, or not set at all this is a finding.

Vulnerability Number

V-219180

Documentable

False

Rule Version

UBTU-18-010108

Severity Override Guidance

Verify that the Ubuntu operating system prevents passwords from being reused for a minimum of five generations by running the following command:

# grep -i remember /etc/pam.d/common-password

password [success=1 default=ignore] pam_unix.so sha512 shadow remember=5 rounds=5000

If the "remember" parameter value is not greater than or equal to 5, commented out, or not set at all this is a finding.

Check Content Reference

M

Target Key

4055

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