All accounts on the system must have unique user or account names.

From Oracle Linux 5 Security Technical Implementation Guide

Part of GEN000300

Associated with: CCI-000764

SV-63251r1_rule All accounts on the system must have unique user or account names.

Vulnerability discussion

A unique user name is the first part of the identification and authentication process. If user names are not unique, there can be no accountability on the system for auditing purposes. Multiple accounts sharing the same name could result in the denial of service to one or both of the accounts or unauthorized access to files or privileges.

Check content

Check the system for duplicate account names. Example: # pwck -r If any duplicate account names are found, this is a finding.

Fix text

Change user account names, or delete accounts, so each account has a unique name.

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