Ensure icmptimestamp is disabled

MediumLevel 1Automatedaix

Description

The icmptimestamp parameter determines whether the system responds to an ICMP timestamp request. Responding to an ICMP timestamp request may provide a remote user with more detailed information about the current date/time of the system. Audit: `no -o icmptimestamp` must report 0.

How it is checked

Audit method: Shell command

shell

command -v no >/dev/null 2>&1 || exit 1; out=$(no -o icmptimestamp 2>/dev/null) || exit 1; printf '%s\n' "$out" | sed 's/[[:blank:]]*=[[:blank:]]*/=/'

Expected output: icmptimestamp=0

How it is fixed

Fix method: Guidance or infrastructure patch

no -p -o icmptimestamp=0 (sets the running value and makes it persistent in /etc/tunables/nextboot)

Properties

Operating systems: Any
Tags: aixhardening
Reference: CIS IBM AIX 7 Benchmark v1.2.0 - 4.5.19 Ensure icmptimestamp is disabled

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target aix