Host SSH daemon, if enabled, must not permit tunnels

MediaNivel 1Automatizadavmware

Descripción

Preventing tunnel creation in the SSH daemon is a security measure aimed at thwarting unauthorized network tunneling through the host. This control, when enforced, helps mitigate the risks associated with potential data exfiltration or unauthorized network access that could occur via SSH tunnels. The audit reads /etc/ssh/sshd_config and requires PermitTunnel no (unset = OpenSSH default no). 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)=="permittunnel" {print tolower($2); exit}' "$f")
case "$v" in '') echo compliant ;; no) echo compliant ;; *) echo "PermitTunnel $v" ;; esac

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

To remediate this recommendation, set PermitTunnel no, restart SSH if authorized, and verify SSH tunnel devices cannot be created.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: vmwareesxiservices
Referencia: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 6.5.11 Host SSH daemon, if enabled, must not permit tunnels

Verificar este host

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

shell

tmaegis scan --target vmware