CVE-2016-4439

Publication date 20 May 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	16.04 LTS xenial	Fixed 1:2.5+dfsg-5ubuntu10.3
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.26
	12.04 LTS precise	Not in release
qemu-kvm	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not affected

Notes

mdeslaur

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

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
qemu	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 · Medium
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