Backup interactive scripts on the IIS 8.5 server must be removed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-76889	IISW-SI-000263	SV-91585r1_rule		Medium

Description

Copies of backup files will not execute on the server, but they can be read by the anonymous user if special precautions are not taken. Such backup copies contain the same sensitive information as the actual script being executed and, as such, are useful to malicious users. Techniques and systems exist today to search web servers for such files and are able to exploit the information contained in them.

STIG	Date
IIS 8.5 Site Security Technical Implementation Guide	2020-06-05

Details

Check Text ( C-76545r1_chk )

Determine whether scripts are used on the web server for the subject website. Common file extensions include, but are not limited to: .cgi, .pl, .vb, .class, .c, .php, .asp, and .aspx. If the website does not utilize CGI, this finding is Not Applicable. Open the IIS 8.5 Manager. Right-click the IIS 8.5 web site name and select “Explore”. Search for the listed script extensions Search for the following files: *.bak, *.old, *.temp, *.tmp, *.backup, or “copy of...”. If files with these extensions are found, this is a finding.

Fix Text (F-83585r1_fix)
Remove the backup files from the production web server.