Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2019-14284

Published: 26 July 2019

In the Linux kernel before 5.2.3, drivers/block/floppy.c allows a denial of service by setup_format_params division-by-zero. Two consecutive ioctls can trigger the bug: the first one should set the drive geometry with .sect and .rate values that make F_SECT_PER_TRACK be zero. Next, the floppy format operation should be called. It can be triggered by an unprivileged local user even when a floppy disk has not been inserted. NOTE: QEMU creates the floppy device by default.

From the Ubuntu Security Team

It was discovered that the floppy driver in the Linux kernel did not properly validate ioctl() calls, leading to a division-by-zero. A local attacker could use this to cause a denial of service (system crash).

Priority

Medium

Cvss 3 Severity Score

6.2

Score breakdown

Status

Package Release Status
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1047.49)
disco
Released (5.0.0-1014.16)
eoan Not vulnerable
(5.3.0-1003.3)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.3~rc1)
xenial
Released (4.4.0-1092.103)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1018.19~18.04.1)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.3~rc1)
disco
Released (5.0.0-1018.19)
eoan Not vulnerable
(5.0.0-1018.19)
xenial
Released (4.15.0-1056.61)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1021.24~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.15.0-1047.49~16.04.1)
linux-oem-5.4
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1007.12~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

xenial Does not exist

upstream
Released (5.3~rc1)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
eoan Does not exist

bionic Not vulnerable
(5.3.0-1017.19~18.04.1)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-60.67)
disco
Released (5.0.0-27.28)
eoan Not vulnerable
(5.2.0-10.11)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.3~rc1)
xenial
Released (4.4.0-161.189)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by f3554aeb991214cbfafd17d55e2bfddb50282e32
linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1007.8~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1018.19~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.15.0-1056.61)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Ignored
(end of life, was needs-triage)
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1042.45)
disco
Released (5.0.0-1015.15)
eoan Not vulnerable
(5.0.0-1015.15)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.15.0-1041.43)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1008.9~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1042.45)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Ignored
(end of standard support)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1041.43)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1015.15~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-27.28~18.04.1)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.15.0-60.67~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was pending)
disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.15.0-60.67~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1043.43)
disco
Released (5.0.0-1015.16)
eoan Not vulnerable
(5.0.0-1015.16)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.4.0-1056.63)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.3~rc1)
xenial Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-mako
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1056.65)
disco Ignored
(end of life, was pending)
eoan
Released (4.15.0-1059.68)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial Ignored
(end of standard support, was needs-triage)
linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1020.22)
disco Ignored
(end of life, was pending)
eoan
Released (5.0.0-1022.24)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1022.25)
disco
Released (5.0.0-1004.8)
eoan Not vulnerable
(5.3.0-1002.2)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.15.0-1022.25~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1044.47)
disco
Released (5.0.0-1015.15)
eoan Not vulnerable
(5.0.0-1015.15)
trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.4.0-1120.129)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1062.69)
disco
Released (5.0.0-1019.20)
eoan Does not exist

trusty Does not exist

upstream
Released (5.3~rc1)
xenial
Released (4.4.0-1124.130)

Severity score breakdown

Parameter Value
Base score 6.2
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H