CVE-2011-1751
HighSummary
Funkcja pciej_write w hw/acpi_piix4.c w emulacji zarządzania energią PIIX4 w qemu-kvm nie sprawdza, czy urządzenie jest hotpluggable przed odłączeniem mostka PCI-ISA. To pozwala uprzywilejowanym użytkownikom gościa na spowodowanie awarii usługi (crash gościa) oraz potencjalne wykonanie dowolnego kodu.
Risk Assessment
Ryzyko dla organizacji polega na możliwości awarii systemu gościa oraz potencjalnym wykonaniu złośliwego kodu, co może prowadzić do utraty danych lub naruszenia bezpieczeństwa.
Recommendation
Zaleca się aktualizację oprogramowania qemu-kvm do najnowszej wersji, aby usunąć tę podatność oraz wprowadzenie dodatkowych kontroli bezpieczeństwa dla urządzeń hotpluggable.
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Original NVD description (English source)
The pciej_write function in hw/acpi_piix4.c in the PIIX4 Power Management emulation in qemu-kvm does not check if a device is hotpluggable before unplugging the PCI-ISA bridge, which allows privileged guest users to cause a denial of service (guest crash) and possibly execute arbitrary code by sending a crafted value to the 0xae08 (PCI_EJ_BASE) I/O port, which leads to a use-after-free related to "active qemu timers."
Vulnerability data from NVD (NIST) · CISA KEV · EPSS