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

MediaNivel 1Automatizadavmware

Descripción

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.

Cómo se verifica

Método de auditoría: Comando de shell

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'

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

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.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: vmwareesxiservices
Referencia: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 6.5.5 Host SSH daemon, if enabled, must set a timeout count on idle sessions

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target vmware