Vulnerability Discussion

In addition to auditing new user and group accounts, these watches will alert the system administrator(s) to any modifications. Any unexpected users, groups, or modifications should be investigated for legitimacy.

Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000304-GPOS-00121, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000466-GPOS-00210, SRG-OS-000476-GPOS-00221

Check

Verify RHEL 10 generates audit records for modifications to "/etc/security/opasswd" with the following command:

$ sudo auditctl -l | grep '/etc/security/opasswd'

-a always,exit -F arch=b32 -F path=/etc/security/opasswd -F perm=wa -F key=identity
-a always,exit -F arch=b64 -F path=/etc/security/opasswd -F perm=wa -F key=identity

If the command does not return these lines, or the lines are commented out, this is a finding.

Fix

Configure RHEL 10 to generate audit records for all modifications to "/etc/security/opasswd" by adding or updating the following rules in "/etc/audit/rules.d/identity.rules":

-a always,exit -F arch=b32 -F path=/etc/security/opasswd -F perm=wa -k identity
-a always,exit -F arch=b64 -F path=/etc/security/opasswd -F perm=wa -k identity

To load the rules to the kernel immediately, use the following command:

$ sudo augenrules --load