VAMI must force clients to select the most secure cipher.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-256669 | VCLD-70-000025 | SV-256669r888529_rule | CCI-000366 | 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. | ||||
| STIG | Date | |||
| VMware vSphere 7.0 VAMI Security Technical Implementation Guide | 2023-06-15 | |||
Details
Check Text (C-256669r888529_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"|sed 's: ::g'
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-60287r888528_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