Out-of-bounds Write Vulnerability in QEMU's 53C9X Fast SCSI Controller Support

Out-of-bounds Write Vulnerability in QEMU's 53C9X Fast SCSI Controller Support

CVE-2016-4439 · MEDIUM Severity

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

The esp_reg_write function in hw/scsi/esp.c in the 53C9X Fast SCSI Controller (FSC) support in QEMU does not properly check command buffer length, which allows local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the QEMU host via unspecified vectors.

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