IBM AIX
TMA-AIX-4.3.4.6
Ensure echo daemon is not in use
Description
This entry starts the echo service when required. This service sends back data received by it on a specified port. The echo service sends back data received by it on a specified port. This can be misused by an attacker to launch DoS attacks or Smurf attacks by initiating a data storm and causing network congestion. Audit: `lssrc -s inetd -l` must not list the service (count 0).
How it is checked
Audit method: Shell command
command -v lssrc >/dev/null 2>&1 || exit 1; n=$(lssrc -s inetd -l 2>/dev/null | grep -c 'echo'); echo "$n"- Expected output
0
How it is fixed
Fix method: Guidance or infrastructure patch
In /etc/inetd.conf, comment out the echo entry and refresh the inetd process: chsubserver -r inetd -C /etc/inetd.conf -d -v 'echo' -p tcp chsubserver -r inetd -C /etc/inetd.conf -d -v 'echo' -p udp lssrc -s inetd && refresh -s inetd
Properties
- Operating systems
- Any
- Tags
- aixservices
- Reference
- CIS IBM AIX 7 Benchmark v1.2.0 - 4.3.4.6 Ensure echo daemon is not in use
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target aix