Host SSH daemon, if enabled, must set a timeout count on idle sessions

MittelStufe 1Automatisiertvmware

Beschreibung

Setting a timeout count on idle SSH sessions ensures that inactive sessions are automatically disconnected after a specified period. This period is calculated by multiplying the timeout count with the idle timeout interval. Automatic disconnection of idle sessions reduces the window of opportunity for unauthorized access. The audit reads /etc/ssh/sshd_config and requires ClientAliveCountMax to be set to a non-zero value; confirm it matches the approved value. Runs in the ESXi Shell (busybox sh) as root.

So wird geprüft

Prüfmethode: Shell-Befehl

shell

f=/etc/ssh/sshd_config; [ -r "$f" ] || exit 1
v=$(awk 'tolower($1)=="clientalivecountmax" {print $2; exit}' "$f")
case "$v" in ''|*[!0-9]*) echo 'ClientAliveCountMax ${v:-not set}'; exit 1 ;; esac
[ "$v" -gt 0 ] && echo compliant || echo 'ClientAliveCountMax is 0'

Erwartete Ausgabe: compliant

So wird behoben

Behebungsmethode: Anleitung oder Infrastruktur-Patch

To remediate this recommendation, set ClientAliveCountMax to the approved value, then restart SSH if enabled and test that inactive sessions are closed after the configured interval/count.

Eigenschaften

Betriebssysteme: Beliebig
Tags: vmwareesxiservices
Referenz: CIS VMware ESXi 8.0 Benchmark v1.4.0 - 6.5.5 Host SSH daemon, if enabled, must set a timeout count on idle sessions

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