The SSH client must not send environment variables to the server or must only send those pertaining to locale.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22478	GEN005529	SV-26772r1_rule	ECSC-1	Low

Description
Environment variables can be used to change the behavior of remote sessions and should be limited. Locale environment variables specify the language, character set, and other features modifying the operation of software to match the user's preferences.

STIG	Date
VMware ESX 3 Server	2016-05-13

Details

Check Text ( C-27780r1_chk )
Check the SSH client configuration for the SendEnv setting. # grep -i SendEnv /etc/ssh/ssh_config | grep -v '^#' If any line is returned other than those permitting LOCALE or LC_* environment variables, this is a finding.

Fix Text (F-24022r1_fix)
Edit the SSH client configuration and remove (or edit) the SendEnv setting(s) to only accept LOCALE or LC_* environment variables.