PublicDateAtUSN: 2018-04-01
Candidate: CVE-2018-1095
PublicDate: 2018-04-02 03:29:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1095
 https://bugzilla.kernel.org/show_bug.cgi?id=199185
 https://ubuntu.com/security/notices/USN-3695-1
 https://ubuntu.com/security/notices/USN-3695-2
Description:
 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.
Ubuntu-Description:
 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).
Notes:
Bugs:
Priority: medium
Discovered-by: Wen Xu
Assigned-to:
CVSS:
 nvd: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H [5.5 MEDIUM]

Patches_linux:
 break-fix: e50e5129f384ae282adebfb561189cdb19b81cee ce3fd194fcc6fbdc00ce095a852f22df97baa401
upstream_linux: released (4.17~rc1)
precise/esm_linux: ignored (was needs-triage ESM criteria)
trusty_linux: not-affected
trusty/esm_linux: not-affected
xenial_linux: not-affected
esm-infra/xenial_linux: not-affected
artful_linux: ignored (reached end-of-life)
bionic_linux: released (4.15.0-24.26)
cosmic_linux: not-affected (4.15.0-29.31)
devel_linux: not-affected (4.15.0-29.31)

Patches_linux-lts-trusty:
upstream_linux-lts-trusty: released (4.17~rc1)
precise/esm_linux-lts-trusty: not-affected
trusty_linux-lts-trusty: DNE
trusty/esm_linux-lts-trusty: DNE
xenial_linux-lts-trusty: DNE
artful_linux-lts-trusty: DNE
bionic_linux-lts-trusty: DNE
cosmic_linux-lts-trusty: DNE
devel_linux-lts-trusty: DNE

Patches_linux-goldfish:
upstream_linux-goldfish: released (4.17~rc1)
precise/esm_linux-goldfish: DNE
trusty_linux-goldfish: ignored (abandoned)
trusty/esm_linux-goldfish: DNE (trusty was ignored [abandoned])
xenial_linux-goldfish: not-affected
artful_linux-goldfish: DNE
bionic_linux-goldfish: DNE
cosmic_linux-goldfish: DNE
devel_linux-goldfish: DNE

Patches_linux-grouper:
upstream_linux-grouper: released (4.17~rc1)
precise/esm_linux-grouper: DNE
trusty_linux-grouper: ignored (abandoned)
trusty/esm_linux-grouper: DNE (trusty was ignored [abandoned])
xenial_linux-grouper: DNE
artful_linux-grouper: DNE
bionic_linux-grouper: DNE
cosmic_linux-grouper: DNE
devel_linux-grouper: DNE

Patches_linux-maguro:
upstream_linux-maguro: released (4.17~rc1)
precise/esm_linux-maguro: DNE
trusty_linux-maguro: ignored (abandoned)
trusty/esm_linux-maguro: DNE (trusty was ignored [abandoned])
xenial_linux-maguro: DNE
artful_linux-maguro: DNE
bionic_linux-maguro: DNE
cosmic_linux-maguro: DNE
devel_linux-maguro: DNE

Patches_linux-mako:
upstream_linux-mako: released (4.17~rc1)
precise/esm_linux-mako: DNE
trusty_linux-mako: ignored (abandoned)
trusty/esm_linux-mako: DNE (trusty was ignored [abandoned])
xenial_linux-mako: ignored (abandoned)
artful_linux-mako: DNE
bionic_linux-mako: DNE
cosmic_linux-mako: DNE
devel_linux-mako: DNE

Patches_linux-manta:
upstream_linux-manta: released (4.17~rc1)
precise/esm_linux-manta: DNE
trusty_linux-manta: ignored (abandoned)
trusty/esm_linux-manta: DNE (trusty was ignored [abandoned])
xenial_linux-manta: DNE
artful_linux-manta: DNE
bionic_linux-manta: DNE
cosmic_linux-manta: DNE
devel_linux-manta: DNE

Patches_linux-flo:
upstream_linux-flo: released (4.17~rc1)
precise/esm_linux-flo: DNE
trusty_linux-flo: ignored (abandoned)
trusty/esm_linux-flo: DNE (trusty was ignored [abandoned])
xenial_linux-flo: ignored (abandoned)
artful_linux-flo: DNE
bionic_linux-flo: DNE
cosmic_linux-flo: DNE
devel_linux-flo: DNE

Patches_linux-raspi2:
upstream_linux-raspi2: released (4.17~rc1)
precise/esm_linux-raspi2: DNE
trusty_linux-raspi2: DNE
trusty/esm_linux-raspi2: DNE
xenial_linux-raspi2: not-affected
artful_linux-raspi2: ignored (reached end-of-life)
bionic_linux-raspi2: released (4.15.0-1013.14)
cosmic_linux-raspi2: not-affected (4.15.0-1021.23)
devel_linux-raspi2: not-affected (4.15.0-1021.23)

Patches_linux-lts-utopic:
upstream_linux-lts-utopic: released (4.17~rc1)
precise/esm_linux-lts-utopic: DNE
trusty_linux-lts-utopic: ignored (out of standard support)
trusty/esm_linux-lts-utopic: DNE (trusty was ignored [out of standard support])
xenial_linux-lts-utopic: DNE
artful_linux-lts-utopic: DNE
bionic_linux-lts-utopic: DNE
cosmic_linux-lts-utopic: DNE
devel_linux-lts-utopic: DNE

Patches_linux-lts-vivid:
upstream_linux-lts-vivid: released (4.17~rc1)
precise/esm_linux-lts-vivid: DNE
trusty_linux-lts-vivid: ignored (out of standard support)
trusty/esm_linux-lts-vivid: DNE (trusty was ignored [out of standard support])
xenial_linux-lts-vivid: DNE
artful_linux-lts-vivid: DNE
bionic_linux-lts-vivid: DNE
cosmic_linux-lts-vivid: DNE
devel_linux-lts-vivid: DNE

Patches_linux-lts-wily:
upstream_linux-lts-wily: released (4.17~rc1)
precise/esm_linux-lts-wily: DNE
trusty_linux-lts-wily: ignored (out of standard support)
trusty/esm_linux-lts-wily: DNE (trusty was ignored [out of standard support])
xenial_linux-lts-wily: DNE
artful_linux-lts-wily: DNE
bionic_linux-lts-wily: DNE
cosmic_linux-lts-wily: DNE
devel_linux-lts-wily: DNE

Patches_linux-lts-xenial:
upstream_linux-lts-xenial: released (4.17~rc1)
precise/esm_linux-lts-xenial: DNE
trusty_linux-lts-xenial: not-affected
trusty/esm_linux-lts-xenial: not-affected
xenial_linux-lts-xenial: DNE
artful_linux-lts-xenial: DNE
bionic_linux-lts-xenial: DNE
cosmic_linux-lts-xenial: DNE
devel_linux-lts-xenial: DNE

Patches_linux-snapdragon:
upstream_linux-snapdragon: released (4.17~rc1)
precise/esm_linux-snapdragon: DNE
trusty_linux-snapdragon: DNE
trusty/esm_linux-snapdragon: DNE
xenial_linux-snapdragon: not-affected
artful_linux-snapdragon: not-affected
bionic_linux-snapdragon: not-affected
cosmic_linux-snapdragon: DNE
devel_linux-snapdragon: DNE

Patches_linux-aws:
upstream_linux-aws: released (4.17~rc1)
precise/esm_linux-aws: DNE
trusty_linux-aws: not-affected
trusty/esm_linux-aws: not-affected
xenial_linux-aws: not-affected
esm-infra/xenial_linux-aws: not-affected
artful_linux-aws: DNE
bionic_linux-aws: released (4.15.0-1011.11)
cosmic_linux-aws: not-affected (4.15.0-1011.11)
devel_linux-aws: not-affected (4.15.0-1011.11)

Patches_linux-hwe:
upstream_linux-hwe: released (4.17~rc1)
precise/esm_linux-hwe: DNE
trusty_linux-hwe: DNE
trusty/esm_linux-hwe: DNE
xenial_linux-hwe: released (4.15.0-24.26~16.04.1)
esm-infra/xenial_linux-hwe: released (4.15.0-24.26~16.04.1)
artful_linux-hwe: DNE
bionic_linux-hwe: not-affected
cosmic_linux-hwe: DNE
devel_linux-hwe: DNE

Patches_linux-hwe-edge:
upstream_linux-hwe-edge: released (4.17~rc1)
precise/esm_linux-hwe-edge: DNE
trusty_linux-hwe-edge: DNE
trusty/esm_linux-hwe-edge: DNE
xenial_linux-hwe-edge: released (4.15.0-24.26~16.04.1)
esm-infra/xenial_linux-hwe-edge: released (4.15.0-24.26~16.04.1)
artful_linux-hwe-edge: DNE
bionic_linux-hwe-edge: not-affected (4.18.0-8.9~18.04.1)
cosmic_linux-hwe-edge: DNE
devel_linux-hwe-edge: DNE

Patches_linux-gke:
upstream_linux-gke: released (4.17~rc1)
precise/esm_linux-gke: DNE
trusty_linux-gke: DNE
trusty/esm_linux-gke: DNE
xenial_linux-gke: not-affected
artful_linux-gke: DNE
bionic_linux-gke: DNE
cosmic_linux-gke: DNE
devel_linux-gke: DNE

Patches_linux-azure:
upstream_linux-azure: released (4.17~rc1)
precise/esm_linux-azure: DNE
trusty_linux-azure: not-affected (4.15.0-1023.24~14.04.1)
trusty/esm_linux-azure: not-affected (4.15.0-1023.24~14.04.1)
xenial_linux-azure: released (4.15.0-1014.14~16.04.1)
esm-infra/xenial_linux-azure: released (4.15.0-1014.14~16.04.1)
artful_linux-azure: DNE
bionic_linux-azure: released (4.15.0-1014.14)
cosmic_linux-azure: not-affected (4.15.0-1014.14)
devel_linux-azure: not-affected (4.15.0-1014.14)

Patches_linux-gcp:
upstream_linux-gcp: released (4.17~rc1)
precise/esm_linux-gcp: DNE
trusty_linux-gcp: DNE
trusty/esm_linux-gcp: DNE
xenial_linux-gcp: released (4.15.0-1014.14~16.04.1)
esm-infra/xenial_linux-gcp: released (4.15.0-1014.14~16.04.1)
artful_linux-gcp: DNE
bionic_linux-gcp: released (4.15.0-1010.10)
cosmic_linux-gcp: not-affected (4.15.0-1010.10)
devel_linux-gcp: not-affected (4.15.0-1010.10)

Patches_linux-kvm:
upstream_linux-kvm: released (4.17~rc1)
precise/esm_linux-kvm: DNE
trusty_linux-kvm: DNE
trusty/esm_linux-kvm: DNE
xenial_linux-kvm: not-affected
esm-infra/xenial_linux-kvm: not-affected
artful_linux-kvm: DNE
bionic_linux-kvm: released (4.15.0-1012.12)
cosmic_linux-kvm: not-affected (4.15.0-1012.12)
devel_linux-kvm: not-affected (4.15.0-1012.12)

Patches_linux-euclid:
upstream_linux-euclid: released (4.17~rc1)
precise/esm_linux-euclid: DNE
trusty_linux-euclid: DNE
trusty/esm_linux-euclid: DNE
xenial_linux-euclid: ignored (was needs-triage ESM criteria)
artful_linux-euclid: DNE
bionic_linux-euclid: DNE
cosmic_linux-euclid: DNE
devel_linux-euclid: DNE

Patches_linux-oem:
upstream_linux-oem: released (4.17~rc1)
precise/esm_linux-oem: DNE
trusty_linux-oem: DNE
trusty/esm_linux-oem: DNE
xenial_linux-oem: ignored (was needed now end-of-life)
artful_linux-oem: DNE
bionic_linux-oem: released (4.15.0-1009.12)
cosmic_linux-oem: not-affected (4.15.0-1009.12)
devel_linux-oem: not-affected (4.15.0-1009.12)

Patches_linux-azure-edge:
upstream_linux-azure-edge: released (4.17~rc1)
precise/esm_linux-azure-edge: DNE
trusty_linux-azure-edge: DNE
trusty/esm_linux-azure-edge: DNE
xenial_linux-azure-edge: released (4.15.0-1014.14)
bionic_linux-azure-edge: not-affected (4.18.0-1003.3~18.04.1)
cosmic_linux-azure-edge: DNE
devel_linux-azure-edge: DNE