CVE-2016-1714

Publication date 12 January 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The (1) fw_cfg_write and (2) fw_cfg_read functions in hw/nvram/fw_cfg.c in QEMU before 2.4, when built with the Firmware Configuration device emulation support, allow guest OS users with the CAP_SYS_RAWIO privilege to cause a denial of service (out-of-bounds read or write access and process crash) or possibly execute arbitrary code via an invalid current entry value in a firmware configuration.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
qemu	15.10 wily	Fixed 1:2.3+dfsg-5ubuntu9.2
	15.04 vivid	Ignored
	14.04 LTS trusty	Fixed 2.0.0+dfsg-2ubuntu1.22
	12.04 LTS precise	Not in release
qemu-kvm	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Fixed 1.0+noroms-0ubuntu14.27

Notes

sbeattie

affects qemu 2.3 and earlier

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/2016-01/msg00428.html Vendor: https://git.centos.org/blob/rpms!qemu-kvm.git/95f32b8c9b6232aa8ecb8e7d520ac1a3f1290e9b/SOURCES!kvm-fw_cfg-add-check-to-validate-current-entry-value-CVE.patch

Severity score breakdown

Parameter	Value
Base score	8.1 · High
Attack vector	Local
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-2891-1
QEMU vulnerabilities
3 February 2016