Check: IIST-SI-000254
Microsoft IIS 10.0 Site STIG:
IIST-SI-000254
(in versions v2 r3 through v1 r1)
Title
The amount of private memory an application pool uses for each IIS 10.0 website must be explicitly set. (Cat II impact)
Discussion
IIS application pools can be periodically recycled to avoid unstable states possibly leading to application crashes, hangs, or memory leaks. By default, application pool recycling is overlapped, which means the worker process to be shut down is kept running until after a new worker process is started. After a new worker process starts, new requests are passed to it. The old worker process shuts down after it finishes processing its existing requests, or after a configured time-out, whichever comes first. This way of recycling ensures uninterrupted service to clients.
Check Content
Note: If the IIS Application Pool is hosting Microsoft SharePoint, this is Not Applicable. If this IIS 10.0 installation is supporting Microsoft Exchange, and not otherwise hosting any content, this requirement is Not Applicable. Open the IIS 10.0 Manager. Perform the following for each Application Pool: Click "Application Pools". Highlight an Application Pool and click "Advanced Settings" in the "Action" Pane. Scroll down to the "Recycling" section and verify the value for "Private Memory Limit" is set to a value other than "0". If the "Private Memory Limit" is set to a value of "0", this is a finding.
Fix Text
Open the IIS 10.0 Manager. Click "Application Pools". Perform the following for each Application Pool: Highlight an Application Pool and click "Advanced Settings" in the "Action" Pane. Scroll down to the "Recycling" section and set the value for "Private Memory Limit" to a value other than "0".
Additional Identifiers
Rule ID: SV-218774r558649_rule
Vulnerability ID: V-218774
Group Title: SRG-APP-000516-WSR-000174
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |