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CVE-2018-5390

Published: 6 August 2018

Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service.

From the Ubuntu Security Team

Juha-Matti Tilli discovered that the TCP implementation in the Linux kernel performed algorithmically expensive operations in some situations when handling incoming packets. A remote attacker could use this to cause a denial of service.

Notes

AuthorNote
tyhicks
Known as "SegmentSmack"

Priority

High

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-30.32)
cosmic Not vulnerable
(4.17.0-7.8)
trusty
Released (3.13.0-155.205)
upstream
Released (4.18~rc7)
xenial
Released (4.4.0-133.159)
Patches:
Introduced by

36a6503feddadbbad415fb3891e80f94c10a9b21

Fixed by 72cd43ba64fc172a443410ce01645895850844c8
Introduced by

36a6503feddadbbad415fb3891e80f94c10a9b21

Fixed by f4a3313d8e2ca9fd8d8f45e40a2903ba782607e7
Introduced by

36a6503feddadbbad415fb3891e80f94c10a9b21

Fixed by 3d4bf93ac12003f9b8e1e2de37fe27983deebdcf
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1017.17)
cosmic Not vulnerable
(4.15.0-1020.20)
trusty
Released (4.4.0-1027.30)
upstream
Released (4.18~rc7)
xenial
Released (4.4.0-1065.75)
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.18~rc7)
xenial Ignored
(abandoned)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1019.19)
cosmic Not vulnerable
(4.15.0-1023.24)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
upstream
Released (4.18~rc7)
xenial
Released (4.15.0-1019.19~16.04.1)
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-1004.4~18.04.1)
cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.15.0-1019.19)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.4.0-9029.31)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1015.15)
cosmic Not vulnerable
(4.15.0-1018.19)
trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.15.0-1015.15~16.04.1)
linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial Ignored
(end of standard support)
linux-goldfish
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.18~rc7)
xenial Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.18~rc7)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.15.0-30.32~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.18.0-11.12~18.04.1)
cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.15.0-30.32~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1017.17)
cosmic Not vulnerable
(4.15.0-1020.20)
trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.4.0-1031.37)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial Does not exist

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

cosmic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.18~rc7)
xenial Does not exist

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

cosmic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.18~rc7)
xenial Does not exist

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

cosmic Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.18~rc7)
xenial Does not exist

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

cosmic Does not exist

trusty
Released (4.4.0-133.159~14.04.1)
upstream
Released (4.18~rc7)
xenial Does not exist

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

cosmic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.18~rc7)
xenial Does not exist

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

cosmic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.18~rc7)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

trusty Does not exist
(trusty was ignored [abandoned])
upstream
Released (4.18~rc7)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1013.16)
cosmic Not vulnerable
(4.15.0-1017.20)
trusty Does not exist

upstream
Released (4.18~rc7)
xenial Ignored
(end of standard support, was needed)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1018.19)
cosmic Not vulnerable
(4.15.0-1021.23)
trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.4.0-1094.102)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Does not exist

trusty Does not exist

upstream
Released (4.18~rc7)
xenial
Released (4.4.0-1098.103)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H