CVE-2014-0146

La función qcow2_open en (block/qcow2.c) en QEMU en versiones anteriores a la 1.7.2 y en versiones 2.x anteriores a la 2.0.0 permite que usuarios locales provoquen una denegación de servicio (desreferencia de puntero NULL) mediante una imagen manipulada que causa un error, relacionado con la inicialización de los campos snapshot_offset y nb_snapshots.

Sibiao Luo discovered that QEMU incorrectly handled device hot-unplugging. A local user could possibly use this flaw to cause a denial of service. Michael S. Tsirkin discovered that QEMU incorrectly handled vmxnet3 devices. A local guest could possibly use this issue to cause a denial of service, or possibly execute arbitrary code on the host. Multiple integer overflow, input validation, logic error, and buffer overflow flaws were discovered in various QEMU block drivers. An attacker able to modify a disk image file loaded by a guest could use these flaws to crash the guest, or corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process. Various other issues have also been addressed.