The vCenter VAMI service must enable honoring the SSL cipher order.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259154	VCLD-80-000096	SV-259154r935366_rule		Medium

Description
During a Transport Layer Security (TLS) session negotiation, when choosing a cipher during a handshake, normally the client's preference is used. This is potentially problematic as a malicious, dated, or poorly configured client could select the most insecure cipher offered by the server, even if it supports stronger ones. If "ssl.honor-cipher-order" is enabled, the "ssl.cipher-list" setting will be treated as an ordered list of cipher values from most preferred to least, left to right.

Description

During a Transport Layer Security (TLS) session negotiation, when choosing a cipher during a handshake, normally the client's preference is used. This is potentially problematic as a malicious, dated, or poorly configured client could select the most insecure cipher offered by the server, even if it supports stronger ones. If "ssl.honor-cipher-order" is enabled, the "ssl.cipher-list" setting will be treated as an ordered list of cipher values from most preferred to least, left to right.

STIG	Date
VMware vSphere 8.0 vCenter Appliance Management Interface (VAMI) Security Technical Implementation Guide	2023-10-29

Details

Check Text ( C-62894r935364_chk )
At the command prompt, run the following command: # /opt/vmware/sbin/vami-lighttpd -p -f /opt/vmware/etc/lighttpd/lighttpd.conf 2>/dev/null\|grep "ssl\.honor-cipher-order" Expected result: ssl.honor-cipher-order = "enable" If the output does not match the expected result, this is a finding. Note: The 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". Refer to KB Article 2100508 for more details: https://kb.vmware.com/s/article/2100508

Check Text ( C-62894r935364_chk )

At the command prompt, run the following command:

# /opt/vmware/sbin/vami-lighttpd -p -f /opt/vmware/etc/lighttpd/lighttpd.conf 2>/dev/null|grep "ssl\.honor-cipher-order"

Expected result:

ssl.honor-cipher-order = "enable"

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

Note: The 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". Refer to KB Article 2100508 for more details:

https://kb.vmware.com/s/article/2100508

Fix Text (F-62803r935365_fix)
Navigate to and open: /opt/vmware/etc/lighttpd/lighttpd.conf Add or reconfigure the following setting: ssl.honor-cipher-order = "enable" Restart the service with the following command: # vmon-cli --restart applmgmt