VMware ESXi
TMA-ESXI9-3.9
Host must automatically deactivate shell services
Descripción
Enabling the automatic deactivation of shell services minimizes the attack surface on the host. The time window for the ESXi Shell and SSH services' availability is defined by UserVars.ESXiShellTimeOut, after which these services are terminated. The recommended setting for this parameter is 3600. The audit reads UserVars.ESXiShellTimeOut with esxcli and requires 3600 seconds or less (0 disables it and fails). Runs in the ESXi Shell (busybox sh) as root.
Cómo se verifica
Método de auditoría: Comando de shell
out=$(esxcli system settings advanced list -o /UserVars/ESXiShellTimeOut 2>/dev/null) || exit 1
v=$(printf '%s\n' "$out" | awk '$1=="Int" && $2=="Value:" {print $3; exit}')
case "$v" in ''|*[!0-9-]*) echo '/UserVars/ESXiShellTimeOut: no integer value'; exit 1 ;; esac
if [ "$v" -gt 0 ] && [ "$v" -le 3600 ]; then echo compliant; else echo "/UserVars/ESXiShellTimeOut = $v (expected 1-3600)"; fi- Salida esperada
compliant
Cómo se corrige
Método de corrección: Guía o parche de infraestructura
To set the timeout to the desired value, perform the following from the vSphere web client: 1. From the vSphere Web Client, select the host. 2. Click Configure then expand System. 3. Select Advanced System Settings then click Edit. 4. Enter ESXiShellTimeOut in the filter. 5. Set the value for this parameter is set to 3600 (1 hour) or less 6. Click OK. Note: A value of 0 disables the ESXiShellTimeOut. Alternately, run the following PowerCLI command: # Set UserVars.ESXiShellTimeOut to 3600 on all hosts Get-VMHost | Get-AdvancedSetting -Name 'UserVars.ESXiShellTimeOut' | Set- AdvancedSetting -Value "3600"
Propiedades
- Sistemas operativos
- Cualquiera
- Etiquetas
- vmwareesximanagement
- Referencia
- CIS VMware ESXi 9.0 Benchmark v1.0.0 - 3.9 Host must automatically deactivate shell services
Verificar este host
Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.
tmaegis scan --target vmware