Host SSH daemon, if enabled, must not permit tunnels

보통레벨 1자동vmware

설명

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.

점검 방법

감사 방식: 셸 명령

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

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

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

속성

운영 체제: 모두
태그: vmwareesxiservices
참고 자료: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 6.5.11 Host SSH daemon, if enabled, must not permit tunnels

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