CVE-2013-2016

Description

A flaw was found in the way qemu v1.3.0 and later (virtio-rng) validates addresses when guest accesses the config space of a virtio device. If the virtio device has zero/small sized config space, such as virtio-rng, a privileged guest user could use this flaw to access the matching host's qemu address space and thus increase their privileges on the host.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
kvm	13.10 saucy	Not in release
	13.04 raring	Not in release
	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Ignored end of life
qemu	13.10 saucy	Not affected
	13.04 raring	Ignored end of life
	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Ignored end of life
qemu-kvm	13.10 saucy	Not in release
	13.04 raring	Not in release
	12.10 quantal	Not affected
	12.04 LTS precise	Not affected
	11.10 oneiric	Not affected
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not in release
xen-3.1	13.10 saucy	Not in release
	13.04 raring	Not in release
	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Ignored end of life
xen-3.2	13.10 saucy	Not in release
	13.04 raring	Not in release
	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Ignored end of life
xen-3.3	13.10 saucy	Not in release
	13.04 raring	Not in release
	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not in release

Notes

mdeslaur

introduced in 1.3.0+ low because of mmap_min_addr

Patch details

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

Package	Patch details
qemu-kvm	Proposed: https://lists.gnu.org/archive/html/qemu-devel/2013-04/msg05254.html Upstream: http://git.qemu.org/?p=qemu.git;a=commit;h=5f5a1318653c08e435cfa52f60b6a712815b659d

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.8 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.8 · High
Exploitability score	-
Impact score	-

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

Cvss 3 Severity Score