CVE-2013-4540

Desbordamiento de buffer en scoop_gpio_handler_update en QEMU anterior a 1.7.2 podría permitir a atacantes remotos ejecutar código arbitrario a través de un valor (1) prev_level, (2) gpio_level, o (3) gpio_dir grande en un imagen savevm.

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.