The Apache web server must have Multipurpose Internet Mail Extensions (MIME) that invoke OS shell programs disabled.

From Apache Server 2.4 Windows Site Security Technical Implementation Guide

Part of SRG-APP-000141-WSR-000081

Associated with: CCI-000381

AS24-W2-000300_rule The Apache web server must have Multipurpose Internet Mail Extensions (MIME) that invoke OS shell programs disabled.

Vulnerability discussion

Controlling what a user of a hosted application can access is part of the security posture of the web server. Any time a user can access more functionality than is needed for the operation of the hosted application poses a security issue. A user with too much access can view information that is not needed for the user's job role, or the user could use the function in an unintentional manner.A MIME tells the web server what type of program various file types and extensions are and what external utilities or programs are needed to execute the file type.A shell is a program that serves as the basic interface between the user and the operating system, so hosted application users must not have access to these programs. Shell programs may execute shell escapes and can then perform unauthorized activities that could damage the security posture of the web server.

Check content

Review the <'INSTALLED PATH'>\conf\httpd.conf file. If "Action" or "AddHandler" exist and they configure .exe, .dll, .com, .bat, or .csh, or any other shell as a viewer for documents, this is a finding.

Fix text

Disable MIME types for .exe, .dll, .com, .bat, and .csh programs. If "Action" or "AddHandler" exist and they configure .exe, .dll, .com, .bat, or .csh, remove those references.

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