CVE-2016-9602

Qemu en versiones anteriores a la 2.9 es vulnerable a un seguimiento de enlace incorrecto cuando se construye con VirtFS. Un usuario privilegiado en guest podría utilizar este fallo para acceder al sistema de archivos del host más allá de la carpeta compartida, pudiendo escalar sus privilegios en un host.

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.