SLEM 5 must require the change of at least eight of the total number of characters when passwords are changed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-261383	SLEM-05-611040	SV-261383r996580_rule		Medium

Description
If SLEM 5 allows the user to consecutively reuse extensive portions of passwords, this increases the chances of password compromise by increasing the window of opportunity for attempts at guessing and brute-force attacks.

STIG	Date
SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide	2024-06-04

Details

Check Text ( C-65112r996578_chk )
Verify SLEM 5 requires at least eight characters be changed between the old and new passwords during a password change with the following command: > grep pam_cracklib.so /etc/pam.d/common-password password requisite pam_cracklib.so difok=8 If the value for "difok" is not "8" or greater, if "difok" is missing from the line, the second column value different from "requisite", the line is commented out, or the line is missing, this is a finding.

Check Text ( C-65112r996578_chk )

Verify SLEM 5 requires at least eight characters be changed between the old and new passwords during a password change with the following command:

> grep pam_cracklib.so /etc/pam.d/common-password
password requisite pam_cracklib.so difok=8

If the value for "difok" is not "8" or greater, if "difok" is missing from the line, the second column value different from "requisite", the line is commented out, or the line is missing, this is a finding.

Fix Text (F-65020r996579_fix)
Configure SLEM 5 to require at least eight characters be changed between the old and new passwords during a password change with the following command: Edit "/etc/pam.d/common-password" and edit the line containing "pam_cracklib.so" to contain the option "difok=8" after the third column.