Performance Charts must hide the server version.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-256636	SRG-APP-000266-WSR-000159	VCPF-70-000026	SV-256636r888399_rule	2023-02-21	1

Description
Web servers will often display error messages to client users, including 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, Performance Charts must be configured with a catchall error handler that redirects to a standard "error.jsp".

Description

Web servers will often display error messages to client users, including 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, Performance Charts must be configured with a catchall error handler that redirects to a standard "error.jsp".

ℹ️ Check
At the command prompt, run the following command: # xmllint --xpath '/Server/Service/Connector/@server' /usr/lib/vmware-perfcharts/tc-instance/conf/server.xml Expected result: server="Anonymous" If the output of the command does not match the expected result, this is a finding.

✔️ Fix
Navigate to and open: /usr/lib/vmware-perfcharts/tc-instance/conf/server.xml Configure the <Connector> node with the following value: server="Anonymous" Restart the service with the following command: # vmon-cli --restart perfcharts