CVE-2017-6505

La función ohci_service_ed_list en hw/usb/hcd-ohci.c en QEMU (también conocido como Quick Emulator) en versiones anteriores a la 2.9.0 permite que los usuarios locales del sistema operativo invitado provoquen una denegación de servicio (bucle infinito) mediante vectores que involucran el número de descriptores de la lista de endpoints de enlace. Esta es una vulnerabilidad diferente de CVE-2017-9330.

Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. It was discovered that QEMU incorrectly handled the JAZZ RC4030 device. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Jann Horn discovered that QEMU incorrectly handled VirtFS directory sharing. A privileged attacker inside the guest could use this issue to access files on the host file system outside of the shared directory and possibly escalate their privileges. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. Various other issues were also addressed.