VCUI-70-000025 - vSphere UI must be configured to show error pages with minimal information.

Information

Web servers will often display error messages to client users with enough information to aid in the debugging of the error. The information given back in error messages may display the web server type, version, patches installed, plug-ins and modules installed, type of code being used by the hosted application, and any backends being used for data storage.

This information could be used by an attacker to blueprint what type of attacks might be successful. Therefore, vSphere UI must be configured to not show server version information in error pages.

Solution

Navigate to and open:

/usr/lib/vmware-vsphere-ui/server/conf/server.xml

Locate the following Host block:

<Host ...>
...
</Host>

Inside this block, remove any existing Valve with className='org.apache.catalina.valves.ErrorReportValve' and add the following:

<Valve className='org.apache.catalina.valves.ErrorReportValve' showServerInfo='false' showReport='false'/>

Restart the service with the following command:

# vmon-cli --restart vsphere-ui

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_VMW_vSphere_7-0_Y23M07_STIG.zip

Item Details

Category: SYSTEM AND INFORMATION INTEGRITY

References: 800-53|SI-11a., CAT|II, CCI|CCI-001312, Rule-ID|SV-256802r889405_rule, STIG-ID|VCUI-70-000025, Vuln-ID|V-256802

Plugin: Unix

Control ID: d892420d8b923680ea2135a55c022d74b59e3148a54194e3f144a32572690834