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The SSH daemon must not accept environment variables from the client or must only accept those pertaining to locale.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22477 | GEN005528 | SV-26771r1_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 |
|---|---|
| UNIX SRG | 2013-03-26 |
Details
| Check Text ( C-27778r1_chk ) |
|---|
| Check the SSH daemon configuration for the AcceptEnv setting. # grep -i AcceptEnv /etc/ssh/sshd_config | grep -v '^#' If any line is returned other than those permitting LOCALE or LC_* environment variables, this is a finding. |
| Fix Text (F-24020r1_fix) |
|---|
| Edit the SSH daemon configuration and remove (or edit) the AcceptEnv setting(s) to only accept LOCALE or LC_* environment variables. |