The SSH daemon must not accept environment variables from the client.

From VMware vSphere ESXi 6.0 Security Technical Implementation Guide

Part of SRG-OS-000480-VMM-002000

Associated with: CCI-000366

SV-77707r1_rule The SSH daemon must not accept environment variables from the client.

Vulnerability discussion

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

Check content

To verify the AcceptEnv setting, run the following command: # grep -i "^AcceptEnv" /etc/ssh/sshd_config If there is no output or the output is not exactly "AcceptEnv", this is a finding.

Fix text

To set the AcceptEnv setting, add or correct the following line in "/etc/ssh/sshd_config": AcceptEnv

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.