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CVE-2016-4439

Published: 20 May 2016

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.

Notes

AuthorNote
mdeslaur
qemu-kvm in precise doesn't build esp.c on Ubuntu

Priority

Medium

Cvss 3 Severity Score

6.7

Score breakdown

Status

Package Release Status
qemu-kvm
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Does not exist

upstream Needs triage

wily Does not exist

xenial Does not exist

qemu
Launchpad, Ubuntu, Debian
precise Does not exist

trusty
Released (2.0.0+dfsg-2ubuntu1.26)
upstream Needs triage

wily Ignored
(end of life)
xenial
Released (1:2.5+dfsg-5ubuntu10.3)
Patches:
other: https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg03273.html
upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=c98c6c105f66f05aa0b7c1d2a4a3f716450907ef

Severity score breakdown

Parameter Value
Base score 6.7
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H