The web-site must limit the number of bytes accepted in a request.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-26041	WA000-WI6210	SV-32692r3_rule	ECSC-1	Medium

Description
By setting limits on web requests, it ensures availability of web services and mitigates the risk of buffer overflow type attacks. The maxAllowedContentLength Request Filter limits the number of bytes the server will accept in a request.

STIG	Date
IIS 7.0 WEB SITE STIG	2015-06-01

Details

Check Text ( C-32889r2_chk )
For each site reviewed: 1. Open the IIS Manager. 2. Click on the site name. 3. Double-click the Request Filtering icon. 4. Click Edit Feature Settings in the Actions Pane. If the maxAllowedContentLength value is not set to 30000000, this is a finding. NOTE: If the site has operational reasons to set maxAllowedContentLength to an alternate value, and has supporting documentation signed by the ISSO, this is not a finding.

Check Text ( C-32889r2_chk )

For each site reviewed:
1. Open the IIS Manager.
2. Click on the site name.
3. Double-click the Request Filtering icon.
4. Click Edit Feature Settings in the Actions Pane.

If the maxAllowedContentLength value is not set to 30000000, this is a finding.

NOTE: If the site has operational reasons to set maxAllowedContentLength to an alternate value, and has supporting documentation signed by the ISSO, this is not a finding.

Fix Text (F-29035r1_fix)
1. Open the IIS Manager. 2. Click the site name under review. 3. Double-click the Request Filtering icon. 4. Click Edit Feature Settings in the Actions Pane. 5. Set the maxAllowedContentLength value to 30000000.