tc Server HORIZON must be configured with a cross-site scripting (XSS) filter.

From VMware vRealize Automation 7.x tc Server Security Technical Implementation Guide

Associated with: CCI-001094

SV-100723r1_rule tc Server HORIZON must be configured with a cross-site scripting (XSS) filter.

Vulnerability discussion

Cross-site scripting (XSS) is a type of computer security vulnerability typically found in web applications. XSS enables attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to bypass access controls such as the same-origin policy.As a web server, tc Server can be vulnerable to XSS if steps are not taken to mitigate the threat. VMware provides the XssFilter component to provide a layer of defense against XSS. Filters are Java objects that performs filtering tasks on either the request to a resource (a servlet or static content), or on the response from a resource, or both.

Check content

At the command prompt, execute the following command: grep -B 2 -A 7 XssFilter /opt/vmware/horizon/workspace/conf/web.xml If the XSS filter is not present, this is a finding.

Fix text

Navigate to and open /opt/vmware/horizon/workspace/conf/web.xml. Configure a node with the below configuration: xssfilter com.vmware.vcops.ui.util.XssFilter fileIncludes /vcops/services/api.js,/vcops/services/api-debug.js,/vcops/services/api-debug-doc.js xssfilter /vcops/services/*

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