Title

User passwords must be changed at least every 60 days. (Cat II impact)

Discussion

Limiting the lifespan of authenticators limits the period of time an unauthorized user has access to the system while using compromised credentials and reduces the period of time available for password-guessing attacks to run against a single password. Solaris 11.4 introduced new password security features that allow for a more granular approach to password duration parameters. The introduction of MAXDAYS, MINDAYS, and WARNDAYS allow the /etc/default/passwd configuration file to enforce a password change every 60 days.

Check Content

The root role is required. Determine if user passwords are properly configured to be changed every 60 days. Determine the OS version to be secured. # uname -v For Solaris 11, 11.1, 11.2, and 11.3: # logins -ox |awk -F: '( $1 != "root" && $8 != "LK" && $8 != "NL" && ( $11 > “56" || $11 < “1" )) { print }' If output is returned and the listed account is accessed via direct logon, this is a finding. Check that /etc/default/password is configured to enforce password expiration every eight weeks or less. # grep "^MAXWEEKS=" /etc/default/passwd If the command does not report MAXWEEKS=8 or less, this is a finding. For Solaris 11.4 or newer: # logins -ox |awk -F: '( $1 != "root" && $8 != "LK" && $8 != "NL" && ($11 > "60"|| $11 < "1")) { print }' If output is returned and the listed account is accessed via direct logon, this is a finding. Check that /etc/default/password is configured to enforce password expiration every 60 days or less. Note: It is an error to set both the WEEKS and the DAYS variant for a given MIN/MAX/WARN variable. # grep "^MAXDAYS=" /etc/default/passwd If the command does not report MAXDAYS=60 or less, this is a finding. # grep "^MAXWEEKS=" /etc/default/passwd If output is returned, this is a finding.

Fix Text

The User Security role is required. For Solaris 11, 11.1, 11.2, and 11.3: Change each username to enforce 56 day password changes. # pfexec passwd -x 56 [username] # pfedit /etc/default/passwd Search for MAXWEEKS. Change the line to read: MAXWEEKS=8 For Solaris 11.4 or newer: Change each username to enforce 60 day password changes. # pfexec passwd -x 60 [username] # pfedit /etc/default/passwd Note: It is an error to set both the WEEKS and the DAYS variant for a given MIN/MAX/WARN variable. Search for MAXDAYS. Change the line to read: MAXDAYS=60 Search for MAXWEEKS. Change the line to read: #MAXWEEKS=

Additional Identifiers

Rule ID: SV-216321r1038967_rule

Vulnerability ID: V-216321

Group Title: SRG-OS-000076

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