CVE-2017-8086

Fuga de memoria en la función v9fs_list_xattr en hw/9pfs/9p-xattr.c en QEMU (también conocido como Quick Emulator) permite a los usuarios locales privilegiados de los sistemas operativos invitados causar una denegación de servicio (por consumo de memoria) a través de vectores que implican la variable orig_value

Li Qiang discovered that QEMU incorrectly handled VirtFS directory sharing. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Jiangxin discovered that QEMU incorrectly handled the Cirrus VGA device. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Li Qiang and Jiangxin discovered that QEMU incorrectly handled the Cirrus VGA device when being used with a VNC connection. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. 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.