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CVE-2018-13100

Published: 3 July 2018

An issue was discovered in fs/f2fs/super.c in the Linux kernel through 4.17.3, which does not properly validate secs_per_zone in a corrupted f2fs image, as demonstrated by a divide-by-zero error.

From the Ubuntu Security Team

Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a denial of service (system crash).

Notes

AuthorNote
sbeattie
possibly also 0cfe75c5b011994651a4ca6d74f20aa997bfc69a
fix subject 'f2fs: fix to do sanity check with secs_per_zone'
tyhicks
The affected user base for this issue is likely small since f2fs is
not the default filesystem and it is not widely used in Ubuntu

Priority

Low

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic
Released (4.15.0-58.64)
cosmic Not vulnerable
(4.18.0-9.10)
disco Not vulnerable
(4.18.0-10.11)
trusty Ignored
(was needed ESM criteria)
upstream
Released (4.19~rc1)
xenial
Released (4.4.0-145.171)
Patches:
Introduced by

aff063e266cbf4754021d8e5d16ee418560906fd

Fixed by 42bf546c1fe3f3654bdf914e977acbc2b80a5be5
linux-aws
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1047.49)
cosmic Not vulnerable
(4.18.0-1002.3)
disco Not vulnerable
(4.18.0-1002.3)
trusty
Released (4.4.0-1040.43)
upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1079.89)
linux-azure
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.18.0-1011.11~18.04.1)
cosmic Not vulnerable
(4.18.0-1003.3)
disco Not vulnerable
(4.18.0-1003.3)
trusty Ignored
(was needed ESM criteria)
upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1055.60)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1047.49~16.04.1)
linux-euclid
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Ignored
(was needed ESM criteria)
linux-azure-edge
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.18.0-1011.11~18.04.1)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1055.60)
linux-flo
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1040.42)
cosmic Not vulnerable
(4.18.0-1002.3)
disco Not vulnerable
(4.18.0-1002.3)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1040.42~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1040.42)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Ignored
(end of standard support)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1040.42)
disco Does not exist

upstream
Released (4.19~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1011.11~18.04.1)
disco Does not exist

upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Not vulnerable
(4.18.0-13.14~18.04.1)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-58.64~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Not vulnerable
(5.0.0-15.16~18.04.1)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-58.64~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1042.42)
cosmic Not vulnerable
(4.18.0-1003.3)
disco Not vulnerable
(4.18.0-1003.3)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1043.49)
linux-lts-trusty
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Ignored
(end of life, was ignored)
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Ignored
(end of life, was ignored)
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Ignored
(end of life, was ignored)
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty
Released (4.4.0-144.170~14.04.1)
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Does not exist

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

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.19~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.15.0-1050.57)
cosmic Ignored
(end of life)
disco
Released (4.15.0-1050.57)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial Ignored
(end of standard support, was needed)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1021.23)
cosmic Ignored
(end of life)
disco
Released (5.0.0-1004.8)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.15.0-1021.23~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic
Released (4.15.0-1043.46)
cosmic Not vulnerable
(4.18.0-1005.7)
disco Not vulnerable
(4.18.0-1005.7)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1106.114)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic
Released (4.15.0-1060.66)
cosmic Does not exist

disco Not vulnerable
(5.0.0-1010.10)
trusty Does not exist

upstream
Released (4.19~rc1)
xenial
Released (4.4.0-1110.115)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H