The vCenter UI service must limit the amount of time that each Transmission Control Protocol (TCP) connection is kept alive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259119	VCUI-80-000125	SV-259119r960735_rule		Medium

Description
Denial of service (DoS) is one threat against web servers. Many DoS attacks attempt to consume web server resources in such a way that no more resources are available to satisfy legitimate requests. In Tomcat, the "connectionTimeout" attribute sets the number of milliseconds the server will wait after accepting a connection for the request Uniform Resource Identifier (URI) line to be presented. This timeout will also be used when reading the request body (if any). This prevents idle sockets that are not sending HTTP requests from consuming system resources and potentially denying new connections.

Description

Denial of service (DoS) is one threat against web servers. Many DoS attacks attempt to consume web server resources in such a way that no more resources are available to satisfy legitimate requests. In Tomcat, the "connectionTimeout" attribute sets the number of milliseconds the server will wait after accepting a connection for the request Uniform Resource Identifier (URI) line to be presented. This timeout will also be used when reading the request body (if any). This prevents idle sockets that are not sending HTTP requests from consuming system resources and potentially denying new connections.

STIG	Date
VMware vSphere 8.0 vCenter Appliance User Interface (UI) Security Technical Implementation Guide	2024-07-11

Details

Check Text ( C-62859r935259_chk )
The connection timeout should not be disabled by setting it to "-1". At the command prompt, run the following command: # xmllint --xpath "//Connector[@connectionTimeout = '-1']" /usr/lib/vmware-vsphere-ui/server/conf/server.xml Expected result: XPath set is empty If any connectors are returned, this is a finding.

Fix Text (F-62768r935260_fix)
Navigate to and open: /usr/lib/vmware-vsphere-ui/server/conf/server.xml Configure the node with the value: connectionTimeout="300000" Restart the service with the following command: # vmon-cli --restart vsphere-ui