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CVE-2018-20843

Published: 24 June 2019

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Notes

AuthorNote
mdeslaur
xmlparse.c doesn't appear to be built in the firefox package

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
cosmic Not vulnerable
(code-not-compiled)
disco Not vulnerable
(code-not-compiled)
eoan Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
trusty Not vulnerable
(code-not-compiled)
xenial Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
groovy Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
upstream Needs triage

mantic Not vulnerable
(code-not-compiled)
ghostscript
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream Needs triage

bionic Not vulnerable
(code-not-compiled)
cosmic Not vulnerable
(code-not-compiled)
disco Not vulnerable
(code-not-compiled)
eoan Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
groovy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
xenial Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
libparagui1.1
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream Needs triage

kinetic Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

lunar Does not exist

xenial Does not exist

mantic Does not exist

poco
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
trusty Not vulnerable
(uses system expat)
upstream Needs triage

xenial Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
sitecopy
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
trusty Does not exist

upstream Not vulnerable
(uses system expat)
xenial Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
audacity
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(uses system expat)
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
kinetic Ignored
(end of life, was needs-triage)
jammy Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
ayttm
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream Needs triage

groovy Does not exist

jammy Does not exist

kinetic Does not exist

xenial Needs triage

hirsute Does not exist

impish Does not exist

lunar Does not exist

mantic Does not exist

cableswig
Launchpad, Ubuntu, Debian
bionic Does not exist

jammy Does not exist

kinetic Does not exist

xenial Needs triage

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

mantic Does not exist

coin3
Launchpad, Ubuntu, Debian
focal Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
xenial Needed

bionic Needed

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
groovy Ignored
(end of life)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
trusty Needed

upstream Needs triage

mantic Not vulnerable
(uses system expat)
firefox
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Not vulnerable

focal Not vulnerable

trusty Does not exist

upstream Needs triage

xenial Not vulnerable

kinetic Not vulnerable

groovy Not vulnerable

hirsute Not vulnerable

impish Not vulnerable

jammy Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

matanza
Launchpad, Ubuntu, Debian
bionic Needs triage

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needs triage

trusty Does not exist

upstream Needs triage

hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
impish Ignored
(end of life)
groovy Ignored
(end of life)
jammy Needs triage

xenial Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
smart
Launchpad, Ubuntu, Debian
focal Does not exist

trusty Does not exist

upstream Needs triage

impish Does not exist

kinetic Does not exist

bionic Not vulnerable
(code-not-compiled)
cosmic Not vulnerable
(code-not-compiled)
disco Not vulnerable
(code-not-compiled)
eoan Not vulnerable
(code-not-compiled)
groovy Does not exist

hirsute Does not exist

jammy Does not exist

lunar Does not exist

xenial Not vulnerable
(code-not-compiled)
mantic Does not exist

tdom
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system expat)
cosmic Ignored
(end of life)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
thunderbird
Launchpad, Ubuntu, Debian
bionic Not vulnerable

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Not vulnerable

focal Not vulnerable

trusty Does not exist

upstream Needs triage

xenial Not vulnerable

kinetic Not vulnerable

groovy Not vulnerable

hirsute Not vulnerable

impish Not vulnerable

jammy Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

vtk
Launchpad, Ubuntu, Debian
trusty
Released (5.8.0-14.1ubuntu3+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
impish Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

upstream Needs triage

xenial
Released (5.10.1+dfsg-2.1ubuntu0.1~esm1)
Available with Ubuntu Pro
mantic Does not exist

swish-e
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
bionic Needs triage

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needs triage

impish Ignored
(end of life)
jammy Needs triage

trusty Does not exist

upstream Needs triage

xenial Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
wxwidgets2.8
Launchpad, Ubuntu, Debian
impish Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

cadaver
Launchpad, Ubuntu, Debian
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
jammy Needs triage

impish Ignored
(end of life)
xenial Needs triage

bionic Needs triage

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needs triage

groovy Ignored
(end of life)
trusty Does not exist

upstream Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
xmlrpc-c
Launchpad, Ubuntu, Debian
hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
bionic Needs triage

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Needs triage

groovy Ignored
(end of life)
impish Ignored
(end of life)
jammy Needs triage

trusty Needs triage

upstream Needs triage

xenial Needs triage

mantic Needs triage

lunar Ignored
(end of life, was needs-triage)
libxmltok
Launchpad, Ubuntu, Debian
kinetic Ignored
(end of life, was needed)
focal
Released (1.2-4ubuntu0.20.04.1~esm1)
Available with Ubuntu Pro
jammy
Released (1.2-4ubuntu0.22.04.1~esm1)
Available with Ubuntu Pro
bionic
Released (1.2-4ubuntu0.18.04.1~esm1)
Available with Ubuntu Pro
hirsute Ignored
(end of life)
impish Ignored
(end of life)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial
Released (1.2-3ubuntu0.16.04.1~esm2)
Available with Ubuntu Pro
mantic Needed

lunar Ignored
(end of life, was needed)
apr-util
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
cosmic Not vulnerable
(code-not-compiled)
disco Not vulnerable
(code-not-compiled)
eoan Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
groovy Not vulnerable
(code-not-compiled)
trusty Not vulnerable
(code-not-compiled)
xenial Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
upstream Needs triage

mantic Not vulnerable
(code-not-compiled)
cmake
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
cosmic Not vulnerable
(code-not-compiled)
disco Not vulnerable
(code-not-compiled)
eoan Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
groovy Not vulnerable
(code-not-compiled)
xenial Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
trusty Does not exist

upstream Needs triage

mantic Not vulnerable
(code-not-compiled)
expat
Launchpad, Ubuntu, Debian
kinetic
Released (2.2.6-2)
bionic
Released (2.2.5-3ubuntu0.1)
cosmic
Released (2.2.6-1ubuntu0.18.10)
disco
Released (2.2.6-1ubuntu0.19.04)
eoan
Released (2.2.6-2)
focal
Released (2.2.6-2)
groovy
Released (2.2.6-2)
hirsute
Released (2.2.6-2)
impish
Released (2.2.6-2)
jammy
Released (2.2.6-2)
lunar
Released (2.2.6-2)
trusty
Released (2.1.0-4ubuntu1.4+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (2.2.6-2)
xenial
Released (2.1.0-7ubuntu0.16.04.4)
mantic
Released (2.2.6-2)
Patches:
upstream: https://github.com/libexpat/libexpat/commit/11f8838bf99ea0a6f0b76f9760c43704d00c4ff6
gdcm
Launchpad, Ubuntu, Debian
kinetic Not vulnerable
(uses system expat)
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
trusty Not vulnerable
(uses system expat)
upstream Needs triage

xenial Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
insighttoolkit
Launchpad, Ubuntu, Debian
kinetic Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage

mantic Does not exist

insighttoolkit4
Launchpad, Ubuntu, Debian
kinetic Not vulnerable
(uses system expat)
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
trusty Does not exist

upstream Needs triage

xenial Needed

mantic Does not exist

kompozer
Launchpad, Ubuntu, Debian
kinetic Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

simgear
Launchpad, Ubuntu, Debian
kinetic Not vulnerable
(uses system expat)
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
texlive-bin
Launchpad, Ubuntu, Debian
kinetic Not vulnerable
(code-not-compiled)
bionic Not vulnerable
(code-not-compiled)
cosmic Not vulnerable
(code-not-compiled)
disco Not vulnerable
(code-not-compiled)
eoan Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
groovy Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
vnc4
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(end of life)
disco Not vulnerable
(code not present)
eoan Not vulnerable
(code not present)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Needed

upstream Needed

xenial Needed

mantic Does not exist

wbxml2
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system expat)
cosmic Not vulnerable
(uses system expat)
disco Not vulnerable
(uses system expat)
eoan Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
groovy Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
trusty Does not exist

upstream Not vulnerable
(uses system expat)
xenial Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
wxwidgets2.6
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

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