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vSphere UI must set URIEncoding to UTF-8.


Finding ID Version Rule ID IA Controls Severity
V-256798 VCUI-70-000021 SV-256798r889393_rule Medium
Invalid user input occurs when a user inserts data or characters into a hosted application's data entry field and the hosted application is unprepared to process that data. This results in unanticipated application behavior, potentially leading to an application compromise. Invalid user input is one of the primary methods employed when attempting to compromise an application. An attacker can also enter Unicode characters into hosted applications in an effort to break out of the document home or root home directory or to bypass security checks. vSphere UI must be configured to use a consistent character set via the "URIEncoding" attribute on the Connector nodes.
VMware vSphere 7.0 vCenter Appliance UI Security Technical Implementation Guide 2023-06-15


Check Text ( C-60473r889391_chk )
At the command prompt, run the following command:

# xmllint --xpath '/Server/Service/Connector[@port="${http.port}"]/@URIEncoding' /usr/lib/vmware-vsphere-ui/server/conf/server.xml

Expected result:


If the output does not match the expected result, this is a finding.
Fix Text (F-60416r889392_fix)
Navigate to and open:


Navigate to each of the nodes.

Configure each node with the value 'URIEncoding="UTF-8"'.

Restart the service with the following command:

# vmon-cli --restart vsphere-ui