The AIX SSH daemon must not allow compression.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-215296 | SRG-OS-000480-GPOS-00227 | AIX7-00-002113 | SV-215296r991589_rule | 2024-08-16 | 3 |
| Description |
|---|
| If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could result in compromise of the system from an unauthenticated connection, potentially with root privileges. |
| ℹ️ Check |
|---|
| Note: If the installed version of OpenSSH is 7.4 or above, this requirement is not applicable. Check the SSH daemon configuration for the Compression setting by running: # grep -i Compression /etc/ssh/sshd_config | grep -v '^#' Compression no If the setting is not present, or it is not set to "no", this is a finding. |
| ✔️ Fix |
|---|
| Edit the "/etc/ssh/sshd_config" file and add (or modify) the following line: Compression no Restart the SSH daemon: # stopsrc -s sshd # startsrc -s sshd |