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V-256810

CAT II (Medium)

The vSphere UI default servlet must be set to "readonly".

Rule ID

SV-256810r889429_rule

STIG

VMware vSphere 7.0 vCenter Appliance UI Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-000366

Discussion

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).

Check Content

At the command prompt, run the following command: 
 
# xmllint --format /usr/lib/vmware-vsphere-ui/server/conf/web.xml | sed '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

Navigate to and open: 
 
/usr/lib/vmware-vsphere-ui/server/conf/web.xml 
 
Navigate to the /<web-apps>/<servlet>/<servlet-name>default</servlet-name>/ node and remove the following node: 
 
<init-param> 
      <param-name>readonly</param-name> 
      <param-value>false</param-value> 
</init-param> 
 
Restart the service with the following command: 
 
# vmon-cli --restart vsphere-ui