Unapproved script mappings in IIS 7 must be removed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-2267	WA000-WI050 IIS7	SV-32335r1_rule	ECSC-1	High

Description
IIS 7 will either allow or deny script execution based on file extension. The ability to control script execution is controlled through two features with IIS 7, Request Filtering and Handler Mappings. For Handler Mappings, the IAO must document and approve all allowable file extensions the web site allows (white list) and denies (black list) by the web-site. The white list and black list will be compared to the Handler Mappings in IIS 7. Handler Mappings at the site level take precedence over Handler Mappings at the server level.

Description

IIS 7 will either allow or deny script execution based on file extension. The ability to control script execution is controlled through two features with IIS 7, Request Filtering and Handler Mappings. For Handler Mappings, the IAO must document and approve all allowable file extensions the web site allows (white list) and denies (black list) by the web-site. The white list and black list will be compared to the Handler Mappings in IIS 7. Handler Mappings at the site level take precedence over Handler Mappings at the server level.

STIG	Date
IIS 7.0 WEB SITE STIG	2013-04-11

Details

Check Text ( C-32741r1_chk )
1. Open the IIS Manager. 2. Click the site name under review. 3. Double click Handler Mappings. 4. If any file extensions from the black list are enabled, this is a finding.

Fix Text (F-28820r1_fix)
1. Open the IIS Manager. 2. Click the site name under review. 3. Double click Handler Mappings. 4. Disable any file extensions listed on the black list that are enabled.