STIG ID: APWS-AT-000240 | SRG: SRG-APP-000131-WSR-000073 | Severity: medium | CCI: | Vulnerability Id: V-256945
In the case of a production web server, areas for content development and testing will not exist, as this type of content is only permissible on a development website.
The process of developing on a functional production website entails a degree of trial and error and repeated testing. This process is often accomplished in an environment where debugging, sequencing, and formatting of content are the main goals. The opportunity for a malicious user to obtain files that reveal business logic and login schemes is high in this situation. The existence of such immature content on a web server represents a significant security risk that is totally avoidable.
The Automation Controller NGINX front-end web server must enforce, either internally or through an external utility, the signing of modules before they are implemented into a production environment. By signing modules, the author guarantees that the module has been reviewed and tested before production implementation.
As a system administrator for each Automation Controller NGINX web server host, execute the following:
NGINXCONF=`nginx -V 2>&1 | tr ' ' '\n' | sed -ne '/conf-path/{s/.*conf-path=\(.*\)/\1/;p}' `
NGINXMODPATH=`nginx -V 2>&1 | tr ' ' '\n' | grep modules-path | sed -ne '/modules-path/{s/.*modules-path=\(.*\)/\1/;p}'`
NGINXMODINC=`grep include /etc/nginx/nginx.conf | grep modules | awk '{print $2}' | xargs dirname`
sudo rm -f ${NGINXMODPATH}/*
sudo rm -f ${NGINXMODINC}/*
sudo -e ${NGINXCONF}
In the editor, remove any lines that contain "load_module".
Save the file and exit the text editor. Run the following command to apply the changes:
sudo systemctl restart nginx
The Automation Controller does not require any nginx dynamic expansion modules to function. Determine if any dynamic modules are specified in the nginx configuration.
As a system administrator for each Automation Controller NGINX web server host execute the following:
NGINXCONF=`nginx -V 2>&1 | tr ' ' '\n' | sed -ne '/conf-path/{s/.*conf-path=\(.*\)/\1/;p}' `
NGINXMODPATH=`nginx -V 2>&1 | tr ' ' '\n' | grep modules-path | sed -ne '/modules-path/{s/.*modules-path=\(.*\)/\1/;p}'`
NGINXMODINC=`grep include /etc/nginx/nginx.conf | grep modules | awk '{print $2}' | xargs dirname`
grep -q load_module ${NGINXCONF} && echo FAILED
[ `ls -1 $NGINXMODPATH | wc -l` == 0 ] || echo FAILED
[ `ls -1 $NGINXMODINC | wc -l` == 0 ] || echo FAILED
If "FAILED" is displayed, this is a finding.