FreeBSD -- Insecure default snmpd.config permissions

Problem Description:
The SNMP protocol supports an authentication model called
USM, which relies on a shared secret. The default permission
of the snmpd configuration file, /etc/snmpd.config, is
weak and does not provide adequate protection against local
unprivileged users.
Impact:
A local user may be able to read the shared secret, if
configured and used by the system administrator.