Microsoft IIS 10.0 Site Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-APP-000246-WSR-000149
<GroupDescription></GroupDescription>Group -
Non-ASCII characters in URLs must be prohibited by any IIS 10.0 website.
<VulnDiscussion>Setting limits on web requests ensures availability of web services and mitigates the risk of buffer overflow type attacks. T...Rule Medium Severity -
SRG-APP-000246-WSR-000149
<GroupDescription></GroupDescription>Group -
Double encoded URL requests must be prohibited by any IIS 10.0 website.
<VulnDiscussion>Request filtering enables administrators to create a more granular rule set with which to allow or reject inbound web content...Rule Medium Severity -
SRG-APP-000246-WSR-000149
<GroupDescription></GroupDescription>Group -
Unlisted file extensions in URL requests must be filtered by any IIS 10.0 website.
<VulnDiscussion>Request filtering enables administrators to create a more granular rule set to allow or reject inbound web content. Setting l...Rule Medium Severity -
SRG-APP-000251-WSR-000157
<GroupDescription></GroupDescription>Group -
Directory Browsing on the IIS 10.0 website must be disabled.
<VulnDiscussion>Directory browsing allows the contents of a directory to be displayed upon request from a web client. If directory browsing i...Rule Medium Severity -
SRG-APP-000266-WSR-000159
<GroupDescription></GroupDescription>Group -
Warning and error messages displayed to clients must be modified to minimize the identity of the IIS 10.0 website, patches, loaded modules, and directory paths.
<VulnDiscussion>HTTP error pages contain information that could enable an attacker to gain access to an information system. Failure to preven...Rule Medium Severity -
SRG-APP-000266-WSR-000160
<GroupDescription></GroupDescription>Group -
Debugging and trace information used to diagnose the IIS 10.0 website must be disabled.
<VulnDiscussion>Setting compilation debug to false ensures detailed error information does not inadvertently display during live application ...Rule Medium Severity -
SRG-APP-000295-WSR-000012
<GroupDescription></GroupDescription>Group -
The Idle Time-out monitor for each IIS 10.0 website must be enabled.
<VulnDiscussion>The idle time-out attribute controls the amount of time a worker process will remain idle before it shuts down. A worker proc...Rule Medium Severity -
SRG-APP-000295-WSR-000134
<GroupDescription></GroupDescription>Group -
The IIS 10.0 websites connectionTimeout setting must be explicitly configured to disconnect an idle session.
<VulnDiscussion>Leaving sessions open indefinitely is a major security risk. An attacker can easily use an already authenticated session to a...Rule Medium Severity -
SRG-APP-000316-WSR-000170
<GroupDescription></GroupDescription>Group -
The IIS 10.0 website must provide the capability to immediately disconnect or disable remote access to the hosted applications.
<VulnDiscussion>During an attack on the web server or any of the hosted applications, the system administrator may need to disconnect or disa...Rule Medium Severity -
SRG-APP-000357-WSR-000150
<GroupDescription></GroupDescription>Group -
The IIS 10.0 website must use a logging mechanism configured to allocate log record storage capacity large enough to accommodate the logging requirements of the IIS 10.0 website.
<VulnDiscussion>To make certain the logging mechanism used by the web server has sufficient storage capacity in which to write the logs, the ...Rule Medium Severity
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