V-222970

Discussion

The Tomcat manager application is used to manage the Tomcat server and the applications that run on Tomcat. By default, the manager application is only accessible via the localhost. Exposing the management application to any network interface that is available to non-administrative personnel leaves the Tomcat server vulnerable to attempts to access the management application. To mitigate this risk, the management application should only be run on the localhost or on network interfaces tied to a dedicated management network. This setting is managed in the $CATALINA_BASE/conf/server.xml file.

Check Content

Review system documentation (SSP) and identify the documented management networks as well as the documented client networks. If the manager application has been deleted from the system, this is not a finding. 

Run the following command as a privileged user:

sudo grep -i -A1 "RemoteAddrValve\|RemoteCIDRValve" $CATALINA_BASE/webapps/manager/META-INF/context.xml 

If there are no results, then no address valves exist and this is a finding.

If the Remote Address Valve settings are commented out or not configured to restrict access to localhost or the management network, this is a finding.

EXAMPLES:

- RemoteAddrValve Localhost only IPV4 and IPV6 example
<Valve className="org.apache.catalina.valves.RemoteAddrValve"
   allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1"/>

- Localhost and Management network CIDR block IPV4 and IPV6 example
<Valve className="org.apache.catalina.valves.RemoteCIDRValve"
allow="127.0.0.1, ::1",192.168.1.0/24/>