Virtual machines must limit PCI/PCIe device passthrough functionality

СреднийУровень 1Автоматическаяvmware

Описание

DirectPath I/O features provide virtual machines the ability to directly access system hardware, which while advantageous for performance, can impact risk mitigation tools like vMotion, DRS, and High Availability. It also opens up a potential attack vector for privileged hardware access. Expected: no pciPassthruN.present = "TRUE". The audit parses every .vmx file under /vmfs/volumes/ on the host and lists the VMs that do not comply; it passes when none are found (or no VMs exist). Runs in the ESXi Shell (busybox sh) as root.

Как проверяется

Метод проверки: Команда оболочки

shell

command -v find >/dev/null 2>&1 || exit 1
out=$(find /vmfs/volumes/ -maxdepth 3 -type f -name '*.vmx' 2>/dev/null | while IFS= read -r f; do
  awk -v KEYRE='^pcipassthru[0-9]+[.]present$' -v MODE='not' -v VAL='TRUE' 'BEGIN { re = tolower(KEYRE) }
{ line = $0; sub(/^[ \t]+/, "", line); i = index(line, "="); if (i == 0) next
  k = tolower(substr(line, 1, i - 1)); sub(/[ \t]+$/, "", k)
  v = substr(line, i + 1); sub(/^[ \t]*"?/, "", v); sub(/"?[ \t\r]*$/, "", v); v = tolower(v)
  if (k ~ re) { seen = 1; if (MODE == "not" && v == tolower(VAL)) bad = bad " " k "=" v
                else if (MODE != "not" && MODE != "ge" && v != tolower(VAL)) bad = bad " " k "=" v
                else if (MODE == "ge" && (v + 0) < (VAL + 0)) bad = bad " " k "=" v } }
END { if ((MODE == "eq" || MODE == "ge") && !seen) bad = " " KEYRE " not set"
      if (bad != "") print FILENAME ":" bad }' "$f"
done)
[ -z "$out" ] && echo compliant || printf '%s\n' "$out" | head -n 25

Ожидаемый вывод: compliant

Как исправляется

Метод исправления: Рекомендация или патч инфраструктуры

The following PowerCLI command can be used: # Add the setting to all VMs Get-VM | New-AdvancedSetting -Name "pciPassthru*.present" -value "false"

Свойства

Операционные системы: Любая
Теги: vmwareesxivirtual-machine
Источник: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 7.7 Virtual machines must limit PCI/PCIe device passthrough functionality

Проверить этот хост

Выполните команду на компьютере, аудит которого вам разрешён. Сканирование работает только на чтение.

shell

tmaegis scan --target vmware