All skeleton files (typically those in /etc/skel) must have mode 0644 or less permissive.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-38735r1_rule All skeleton files (typically those in /etc/skel) must have mode 0644 or less permissive.

Vulnerability discussion

If the skeleton files are not protected, unauthorized personnel could change user startup parameters and possibly jeopardize user files.

Check content

Check skeleton files permissions. Procedure: # ls -l /etc/security/.profile If a skeleton file has a mode more permissive than 0644, this is a finding. Check the mkuser.sys file. The /etc/security/mkuser.sys is a script containing items used in creation of users' ~/.profile files. This script needs to be both protected from unauthorized modification, but also needs to be executable, therefore the permissions need to be at the mode of 755. #ls -l /etc/security/mkuser.sys If the mkuser.sys file has a mode more permissive than 0755, this is a finding.

Fix text

Change the mode of skeleton files with incorrect mode. # chmod 0644 /etc/security/.profile #chmod 0755 /etc/security/mkuser.sys

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