The Security Token Service default servlet must be set to "readonly".

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-256774	VCST-70-000031	SV-256774r889292_rule		Medium

Description
The default servlet (or DefaultServlet) is a special servlet provided with Tomcat that is called when no other suitable page is found in a particular folder. The DefaultServlet serves static resources as well as directory listings. The DefaultServlet is configured by default with the "readonly" parameter set to "true" where HTTP commands such as PUT and DELETE are rejected. Changing this to "false" allows clients to delete or modify static resources on the server and to upload new resources. DefaultServlet readonly must be set to "true", either literally or by absence (default).

Description

The default servlet (or DefaultServlet) is a special servlet provided with Tomcat that is called when no other suitable page is found in a particular folder. The DefaultServlet serves static resources as well as directory listings. The DefaultServlet is configured by default with the "readonly" parameter set to "true" where HTTP commands such as PUT and DELETE are rejected. Changing this to "false" allows clients to delete or modify static resources on the server and to upload new resources. DefaultServlet readonly must be set to "true", either literally or by absence (default).

STIG	Date
VMware vSphere 7.0 vCenter Appliance STS Security Technical Implementation Guide	2023-06-15

Details

Check Text ( C-60449r889290_chk )
At the command prompt, run the following command: # xmllint --format /usr/lib/vmware-sso/vmware-sts/conf/web.xml \| sed '2 s/xmlns=".*"//g' \| xmllint --xpath '/web-app/servlet/servlet-name[text()="default"]/../init-param/param-name[text()="readonly"]/../param-value[text()="false"]' - Expected result: XPath set is empty If the output of the command does not match the expected result, this is a finding.

Check Text ( C-60449r889290_chk )

At the command prompt, run the following command:

# xmllint --format /usr/lib/vmware-sso/vmware-sts/conf/web.xml | sed '2 s/xmlns=".*"//g' | xmllint --xpath '/web-app/servlet/servlet-name[text()="default"]/../init-param/param-name[text()="readonly"]/../param-value[text()="false"]' -

Expected result:

XPath set is empty

If the output of the command does not match the expected result, this is a finding.

Fix Text (F-60392r889291_fix)
Navigate to and open: /usr/lib/vmware-sso/vmware-sts/conf/web.xml Navigate to the ///default/ node and remove the following node: readonly false Restart the service with the following command: # vmon-cli --restart sts