CVE-2016-4439

MEDIUM

QEMU 53C9X FSC - DoS/Arbitrary Code Execution

Title source: llm

Description

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.

References (8)

[Mailing List, Patch, Third Party Advisory] http://www.openwall.com/lists/oss-security/2016/05/19/3

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/90760

[Third Party Advisory] http://www.ubuntu.com/usn/USN-3047-1

[Third Party Advisory] http://www.ubuntu.com/usn/USN-3047-2

[Issue Tracking, Third Party Advisory, VDB Entry] https://bugzilla.redhat.com/show_bug.cgi?id=1337502

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html

[Mailing List, Patch, Third Party Advisory] https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg03273.html

[Third Party Advisory] https://security.gentoo.org/glsa/201609-01

Scores

CVSS v3 6.7

EPSS 0.0031

EPSS Percentile 53.8%

Attack Vector LOCAL

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

Classification

CWE

CWE-119

Status draft

Affected Products (5)

canonical/ubuntu_linux

canonical/ubuntu_linux

canonical/ubuntu_linux

qemu/qemu < 2.6.0

debian/debian_linux

Timeline

Published May 20, 2016

Tracked Since Feb 18, 2026