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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-41699	SRG-APP-000141-WSR-000081	SV-54276r3_rule		Medium

Description
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.

Description

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.

STIG	Date
Web Server Security Requirements Guide	2019-03-20

Details

Check Text ( C-48096r2_chk )
Review the web server documentation and deployment configuration to determine if the OS shell is accessible by any MIME types that are enabled. If a user of the web server can invoke OS shell programs, this is a finding.

Fix Text (F-47158r2_fix)
Configure the web server to disable all MIME types that invoke OS shell programs.