Unapproved script mappings in IIS 7 must be removed.

SV-32335r4_rule Unapproved script mappings in IIS 7 must be removed.

Vulnerability discussion

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 ISSO 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.

Check content

1. Open the IIS Manager. 2. Click the site name under review. 3. Double-click on Handler Mappings. If any file extensions on the black list are configured with a Handler Mapping, this is a finding.

Fix text

1. Open the IIS Manager. 2. Click the site name under review. 3. Double-click on Handler Mappings. 4. Remove any file extensions which are listed on the black list and for which a Handler Mapping has been configured.

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.