STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must limit the maximum number of repeating characters of the same character class to four when passwords are changed.

DISA Rule

SV-282452r1200336_rule

Vulnerability Number

V-282452

Group Title

SRG-OS-000072-GPOS-00040

Rule Version

TOSS-05-000350

Severity

CAT II

CCI(s)

• CCI-004066 - For password-based authentication, enforce organization-defined composition and complexity rules.

Weight

10

Fix Recommendation

Configure TOSS 5 to require the change of the number of repeating characters of the same character class when passwords are changed by setting the "maxclassrepeat" option.

Add the following line to "/etc/security/pwquality.conf" conf (or modify the line to have the required value):

maxclassrepeat = 4

Check Contents

Verify the value of the "maxclassrepeat" option in "/etc/security/pwquality.conf" using the following command:

$ grep maxclassrepeat /etc/security/pwquality.conf

maxclassrepeat = 4

If the value of "maxclassrepeat" is set to "0", more than "4", or is commented out, this is a finding.

Vulnerability Number

V-282452

Documentable

False

Rule Version

TOSS-05-000350

Severity Override Guidance

Verify the value of the "maxclassrepeat" option in "/etc/security/pwquality.conf" using the following command:

$ grep maxclassrepeat /etc/security/pwquality.conf

maxclassrepeat = 4

If the value of "maxclassrepeat" is set to "0", more than "4", or is commented out, this is a finding.

Check Content Reference

M

Target Key

5738