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The Oracle Linux operating system must be configured so that /etc/pam.d/passwd implements /etc/pam.d/system-auth when changing passwords.


Overview

Finding ID Version Rule ID IA Controls Severity
V-221667 OL07-00-010118 SV-221667r603260_rule Medium
Description
Pluggable authentication modules (PAM) allow for a modular approach to integrating authentication methods. PAM operates in a top-down processing model and if the modules are not listed in the correct order, an important security function could be bypassed if stack entries are not centralized.
STIG Date
Oracle Linux 7 Security Technical Implementation Guide 2022-09-07

Details

Check Text ( C-23382r419073_chk )
Verify that /etc/pam.d/passwd is configured to use /etc/pam.d/system-auth when changing passwords:

# cat /etc/pam.d/passwd | grep -i substack | grep -i system-auth
password substack system-auth

If no results are returned, the line is commented out, this is a finding.
Fix Text (F-23371r419074_fix)
Configure PAM to utilize /etc/pam.d/system-auth when changing passwords.

Add the following line to "/etc/pam.d/passwd" (or modify the line to have the required value):

password substack system-auth