Host must restrict inter-VM transparent page sharing

СредњаНиво 1Аутоматскаvmware

Опис

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.

Како се проверава

Метод провере: Команда љуске

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

Очекивани излаз: compliant

Како се исправља

Метод исправке: Смерница или закрпа инфраструктуре

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

Својства

Оперативни системи: Било који
Ознаке: vmwareesxibase
Референца: CIS VMware ESXi 9.0 Benchmark v1.0.0 - 2.10 Host must restrict inter-VM transparent page sharing

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shell

tmaegis scan --target vmware