VMware ESXi
TMA-ESXI9-2.10
Host must restrict inter-VM transparent page sharing
Descrição
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.
Como é verificado
Método de auditoria: Comando 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- Saída esperada
compliant
Como é corrigido
Método de correção: Orientação ou patch de infraestrutura
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
Propriedades
- Sistemas operacionais
- Qualquer
- Tags
- vmwareesxibase
- Referência
- CIS VMware ESXi 9.0 Benchmark v1.0.0 - 2.10 Host must restrict inter-VM transparent page sharing
Verificar este host
Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.
tmaegis scan --target vmware