All shell files must be group-owned by root, bin, or sys.

From SOLARIS 10 X86 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-39902r1_rule All shell files must be group-owned by root, bin, or sys.

Vulnerability discussion

If shell files are group-owned by users other than root or a system group, they could be modified by intruders or malicious users to perform unauthorized actions.

Check content

If /etc/shells exists, check the group ownership of each shell referenced. Procedure: # cat /etc/shells | xargs -n1 ls -lL Otherwise, check any shells found on the system. Procedure: # find / -name "*sh" | xargs -n1 ls -lL If a shell is not group-owned by root, bin, or sys, this is a finding.

Fix text

Change the group-owner of the shell to root, bin, or sys. Procedure: # chgrp root

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