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CVE-2018-8822

Published: 20 March 2018

Incorrect buffer length handling in the ncp_read_kernel function in fs/ncpfs/ncplib_kernel.c in the Linux kernel through 4.15.11, and in drivers/staging/ncpfs/ncplib_kernel.c in the Linux kernel 4.16-rc through 4.16-rc6, could be exploited by malicious NCPFS servers to crash the kernel or execute code.

From the Ubuntu Security Team

Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation in the Linux kernel. A remote attacker controlling a malicious NCPFS server could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Medium

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-15.16)
upstream
Released (4.16~rc7)
artful
Released (4.13.0-43.48)
trusty
Released (3.13.0-149.199)
xenial
Released (4.4.0-127.153)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 4c41aa24baa4ed338241d05494f2c595c885af8f
linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1003.3)
upstream
Released (4.16~rc7)
artful Does not exist

trusty
Released (4.4.0-1022.22)
xenial
Released (4.4.0-1060.69)
linux-azure
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1004.4)
upstream
Released (4.16~rc7)
artful Does not exist

trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
xenial
Released (4.13.0-1018.21)
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1003.3)
upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist

xenial
Released (4.13.0-1017.21)
linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist

xenial Ignored
(end of standard support, was needed)
linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Ignored
(end of life, was needed)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Not vulnerable

upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist

xenial
Released (4.13.0-43.48~16.04.1)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist

xenial Ignored
(was needs-triage ESM criteria)
linux-kvm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1004.4)
upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist

xenial
Released (4.4.0-1026.31)
linux-oem
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1002.3)
upstream
Released (4.16~rc7)
artful Does not exist

trusty Does not exist

xenial
Released (4.13.0-1028.31)
linux-hwe-edge
Launchpad, Ubuntu, Debian
artful Does not exist

bionic
Released (4.18.0-8.9~18.04.1)
trusty Does not exist

upstream
Released (4.16~rc7)
xenial
Released (4.13.0-43.48~16.04.1)
linux-lts-trusty
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

trusty Does not exist

upstream
Released (4.16~rc7)
xenial Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.16~rc7)
xenial Does not exist

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

bionic Does not exist

trusty Ignored
(end of life, was needs-triage)
upstream
Released (4.16~rc7)
xenial Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.16~rc7)
xenial Does not exist

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

bionic Does not exist

trusty
Released (4.4.0-127.153~14.04.1)
upstream
Released (4.16~rc7)
xenial Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.16~rc7)
xenial Does not exist

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

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.16~rc7)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.16~rc7)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
artful
Released (4.13.0-1020.21)
bionic Not vulnerable
(4.15.0-1006.7)
trusty Does not exist

upstream
Released (4.16~rc7)
xenial
Released (4.4.0-1090.98)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful
Released (4.4.0-1093.98)
bionic Not vulnerable

trusty Does not exist

upstream
Released (4.16~rc7)
xenial
Released (4.4.0-1093.98)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H