Virtual machines must limit PCI/PCIe device passthrough functionality

SrednjaNivo 1Automatskavmware

Opis

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.

Kako se proverava

Metod provere: Komanda ljuske

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

Očekivani izlaz: compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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

Svojstva

Operativni sistemi: Bilo koji
Oznake: vmwareesxivirtual-machine
Referenca: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 7.7 Virtual machines must limit PCI/PCIe device passthrough functionality

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target vmware