VAMI must set the encoding for all text mime types to UTF-8.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-239735	VCLD-67-000028	SV-239735r816819_rule		Medium

Description
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 into hosted applications in an effort to break out of the document home or root home directory or to bypass security checks.

Description

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 into hosted applications in an effort to break out of the document home or root home directory or to bypass security checks.

STIG	Date
VMware vSphere 6.7 VAMI-lighttpd Security Technical Implementation Guide	2022-01-03

Details

Check Text ( C-42968r816818_chk )
Note: The below command must be run from a bash shell and not from a shell generated by the "appliance shell". Use the "chsh" command to change the shell for the account to "/bin/bash". At the command prompt, execute the following command: # /opt/vmware/sbin/vami-lighttpd -p -f /opt/vmware/etc/lighttpd/lighttpd.conf\|awk '/mimetype\.assign/,/\)/'\|grep "text/"\|grep -v "charset=utf-8" If the command returns any value, this is a finding.

Check Text ( C-42968r816818_chk )

Note: The below command must be run from a bash shell and not from a shell generated by the "appliance shell". Use the "chsh" command to change the shell for the account to "/bin/bash".

At the command prompt, execute the following command:

# /opt/vmware/sbin/vami-lighttpd -p -f /opt/vmware/etc/lighttpd/lighttpd.conf|awk '/mimetype\.assign/,/\)/'|grep "text/"|grep -v "charset=utf-8"

If the command returns any value, this is a finding.

Fix Text (F-42927r679314_fix)
Navigate to and open /opt/vmware/etc/lighttpd/lighttpd.conf. Navigate to the "mimetype.assign" block. Replace all the mappings whose assigned type is "text/*" with mappings for UTF-8 encoding, as follows: ".css" => "text/css; charset=utf-8", ".html" => "text/html; charset=utf-8", ".htm" => "text/html; charset=utf-8", ".js" => "text/javascript; charset=utf-8", ".asc" => "text/plain; charset=utf-8", ".c" => "text/plain; charset=utf-8", ".cpp" => "text/plain; charset=utf-8", ".log" => "text/plain; charset=utf-8", ".conf" => "text/plain; charset=utf-8", ".text" => "text/plain; charset=utf-8", ".txt" => "text/plain; charset=utf-8", ".spec" => "text/plain; charset=utf-8", ".dtd" => "text/xml; charset=utf-8", ".xml" => "text/xml; charset=utf-8",

Fix Text (F-42927r679314_fix)

Navigate to and open /opt/vmware/etc/lighttpd/lighttpd.conf.

Navigate to the "mimetype.assign" block.

Replace all the mappings whose assigned type is "text/*" with mappings for UTF-8 encoding, as follows:

".css" => "text/css; charset=utf-8",
".html" => "text/html; charset=utf-8",
".htm" => "text/html; charset=utf-8",
".js" => "text/javascript; charset=utf-8",
".asc" => "text/plain; charset=utf-8",
".c" => "text/plain; charset=utf-8",
".cpp" => "text/plain; charset=utf-8",
".log" => "text/plain; charset=utf-8",
".conf" => "text/plain; charset=utf-8",
".text" => "text/plain; charset=utf-8",
".txt" => "text/plain; charset=utf-8",
".spec" => "text/plain; charset=utf-8",
".dtd" => "text/xml; charset=utf-8",
".xml" => "text/xml; charset=utf-8",