The value mesg n must be configured as the default setting for all users.

From Solaris 11 SPARC Security Technical Implementation Guide

Associated with: CCI-000366

SV-60947r2_rule The value mesg n must be configured as the default setting for all users.

Vulnerability discussion

The "mesg n" command blocks attempts to use the "write" or "talk" commands to contact users at their terminals, but has the side effect of slightly strengthening permissions on the user's TTY device.

Check content

Determine if "mesg n" is the default for users. # grep "^mesg" /etc/.login # grep "^mesg" /etc/profile If either of these commands produces a line: mesg y this is a finding. For each existing user on the system, enter the command: # mesg If the command output is: is y this is a finding.

Fix text

The root role is required. Edit the default profile configuration files. # pfedit /etc/profile # pfedit /etc/.login In each file add a new line: mesg n For each user on the system, enter the command: # mesg n

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