The system must require at least four characters be changed between the old and new passwords during a password change.

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The system must require at least four characters be changed between the old and new passwords during a password change.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22306	GEN000750	SV-25953r1_rule	IAIA-1 IAIA-2	Medium

Description
To ensure password changes are effective in their goals, the system must ensure old and new passwords have significant differences. Without significant changes, new passwords may be easily guessed based on the value of a previously compromised password.

STIG	Date
UNIX SRG	2013-03-26

Details

Check Text ( C-30813r1_chk )
Consult vendor documentation for the configuration setting that controls the minimum number of changed characters required during a password change. If the configured number is less than 4, this is a finding.

Fix Text (F-27391r1_fix)
Consult vendor documentation for the configuration setting that controls the minimum number of changed characters required during a password change. Change the setting to 4.