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VMware ESXi

TMA-ESXI9-2.10

Host must restrict inter-VM transparent page sharing

MediaNivel 1Automatizadavmware

Descripción

Transparent Page Sharing (TPS) aids in optimizing memory usage among virtual machines but under certain circumstances can be exploited to access data on adjacent virtual machines unauthorizedly. By configuring the Mem.ShareForceSalting parameter, inter-VM TPS is restricted, enhancing isolation and security. The audit reads Mem.ShareForceSalting with esxcli and requires 2. Runs in the ESXi Shell (busybox sh) as root.

Cómo se verifica

Método de auditoría: Comando de shell

shell
out=$(esxcli system settings advanced list -o /Mem/ShareForceSalting 2>/dev/null) || exit 1
v=$(printf '%s\n' "$out" | awk '$1=="Int" && $2=="Value:" {print $3; exit}')
case "$v" in ''|*[!0-9-]*) echo '/Mem/ShareForceSalting: no integer value'; exit 1 ;; esac
if [ "$v" -eq 2 ]; then echo compliant; else echo "/Mem/ShareForceSalting = $v (expected 2)"; fi
Salida esperada
compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

From the vSphere Web Client: 1. Select a host 2. Click Configure then expand System then select Advanced System settings. 3. Click Edit then Filter for Mem.ShareForceSalting. 4. Set the value to 2. 5. Click OK. Additionally, the following PowerCLI command can be used: Get-VMHost | Get-AdvancedSetting -Name Mem.ShareForceSalting | Set-AdvancedSetting -Value 2

Propiedades

Sistemas operativos
Cualquiera
Etiquetas
vmwareesxibase
Referencia
CIS VMware ESXi 9.0 Benchmark v1.0.0 - 2.10 Host must restrict inter-VM transparent page sharing

Verificar este host

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

shell
tmaegis scan --target vmware