The system must restrict the ability to switch to the root user to members of a defined group.

From AIX 5.3 Security Technical Implementation Guide

Associated with IA controls: ECLP-1

Associated with: CCI-000009

SV-38680r1_rule The system must restrict the ability to switch to the root user to members of a defined group.

Vulnerability discussion

Configuring a supplemental group for users permitted to switch to the root user prevents unauthorized users from accessing the root account, even with knowledge of the root credentials.

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Fix text

Use the chsec command to only allow users in the adm group to su to root. #chsec -f /etc/security/user -s root -a sugroups=adm

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