A login banner must be displayed immediately prior to, or as part of, graphical desktop environment login prompts.

From Oracle Linux 6 Security Technical Implementation Guide

Associated with: CCI-000050

SV-65333r2_rule A login banner must be displayed immediately prior to, or as part of, graphical desktop environment login prompts.

Vulnerability discussion

An appropriate warning message reinforces policy awareness during the logon process and facilitates possible legal action against attackers.

Check content

If the GConf2 package is not installed, this is not applicable. To ensure a login warning banner is enabled, run the following: $ gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --get /apps/gdm/simple-greeter/banner_message_enable Search for the "banner_message_enable" schema. If properly configured, the "default" value should be "true". If it is not, this is a finding.

Fix text

To enable displaying a login warning banner in the GNOME Display Manager's login screen, run the following command: # gconftool-2 --direct \ --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory \ --type bool \ --set /apps/gdm/simple-greeter/banner_message_enable true To display a banner, this setting must be enabled and then banner text must also be set.

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