UIDs reserved for system accounts must not be assigned to non-system accounts.

From SOLARIS 10 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-12447r2_rule UIDs reserved for system accounts must not be assigned to non-system accounts.

Vulnerability discussion

Reserved UIDs are typically used by system software packages. If non-system accounts have UIDs in this range, they may conflict with system software, possibly leading to the user having permissions to modify system files.

Check content

Check the UID assignments of all accounts. # more /etc/passwd Confirm all accounts with a UID of 99 and below are used by a system account. If a UID reserved for system accounts (0 - 99) is used by a non-system account, this is a finding.

Fix text

Change the UID numbers for non-system accounts with reserved UIDs (those less or equal to 99).

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