CVE-2018-1095
Published: 1 April 2018
The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.
From the Ubuntu Security Team
Wen Xu discovered that the ext4 file system implementation in the Linux kernel did not properly validate xattr sizes. A local attacker could use this to cause a denial of service (system crash).
Priority
Status
Package | Release | Status |
---|---|---|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1014.14)
|
upstream |
Released
(4.17~rc1)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1014.14)
|
|
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
xenial |
Released
(4.15.0-1014.14~16.04.1)
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1003.3~18.04.1)
|
upstream |
Released
(4.17~rc1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.15.0-1014.14)
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.17~rc1)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(was needs-triage ESM criteria)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1010.10)
|
upstream |
Released
(4.17~rc1)
|
|
artful |
Does not exist
|
|
cosmic |
Not vulnerable
(4.15.0-1010.10)
|
|
trusty |
Does not exist
|
|
xenial |
Released
(4.15.0-1014.14~16.04.1)
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
upstream |
Released
(4.17~rc1)
|
|
artful |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
|
|
linux Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
bionic |
Released
(4.15.0-24.26)
|
|
cosmic |
Not vulnerable
(4.15.0-29.31)
|
|
trusty |
Not vulnerable
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Not vulnerable
|
|
Patches: Introduced by e50e5129f384ae282adebfb561189cdb19b81cee |
||
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1011.11)
|
|
cosmic |
Not vulnerable
(4.15.0-1011.11)
|
|
trusty |
Not vulnerable
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Not vulnerable
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Not vulnerable
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-24.26~16.04.1)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-8.9~18.04.1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Released
(4.15.0-24.26~16.04.1)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1012.12)
|
|
cosmic |
Not vulnerable
(4.15.0-1012.12)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Not vulnerable
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Not vulnerable
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Does not exist
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Released
(4.15.0-1009.12)
|
|
cosmic |
Not vulnerable
(4.15.0-1009.12)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
bionic |
Released
(4.15.0-1013.14)
|
|
cosmic |
Not vulnerable
(4.15.0-1021.23)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Not vulnerable
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.17~rc1)
|
|
xenial |
Not vulnerable
|
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 |