The echo daemon must be disabled on AIX.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-215391 | SRG-OS-000095-GPOS-00049 | AIX7-00-003086 | SV-215391r958478_rule | 2024-08-16 | 3 |
| Description |
|---|
| The echo service can be used in Denial of Service or SMURF attacks. It can also be used by someone else to get through a firewall or start a data storm. The echo service is unnecessary and it increases the attack vector of the system. |
| ℹ️ Check |
|---|
| Check the /etc/inetd.conf for TCP and UDP echo service entries using command: # grep echo /etc/inetd.conf | grep -v \# If there is any output from the command, this is a finding. |
| ✔️ Fix |
|---|
| In "/etc/inetd.conf", comment out the "echo" entries by running commands: # chsubserver -r inetd -C /etc/inetd.conf -d -v 'echo' -p 'tcp' # chsubserver -r inetd -C /etc/inetd.conf -d -v 'echo' -p 'udp' Restart inetd: # refresh -s inetd |