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CVE-2021-45960

Published: 1 January 2022

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

Notes

AuthorNote
sbeattie
paraview uses system expat
xotcl uses system expat
poco uses system expat
gdcm uses system expat
audacity uses system expat
simgear uses system expat
coin3 uses system expat as of 4.0.0~CMake~6f54f1602475+ds1-1
sitecopy uses system expat since 1:0.16.0-1 (dapper!)
rodrigo-zaiden
libxmltok does not include nsAttsPower, so, not affected.

Priority

Low

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
trusty Not vulnerable
(code-not-compiled)
upstream Needs triage

xenial Not vulnerable
(code-not-compiled)
bionic Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
apr-util
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
trusty Not vulnerable
(code-not-compiled)
upstream Needs triage

xenial Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
ayttm
Launchpad, Ubuntu, Debian
upstream Needs triage

bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Does not exist

xenial Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

cableswig
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

cadaver
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

impish Ignored
(end of life)
trusty Does not exist

upstream Needs triage

xenial Needs triage

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

lunar Needs triage

mantic Needs triage

cmake
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
coin3
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
trusty Needs triage

upstream Needs triage

xenial Needs triage

jammy Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
expat
Launchpad, Ubuntu, Debian
bionic
Released (2.2.5-3ubuntu0.4)
focal
Released (2.2.9-1ubuntu0.2)
impish
Released (2.4.1-2ubuntu0.1)
trusty
Released (2.1.0-4ubuntu1.4+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial
Released (2.1.0-7ubuntu0.16.04.5+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
hirsute Ignored
(end of life)
jammy
Released (2.4.3-1)
kinetic
Released (2.4.3-1)
lunar
Released (2.4.3-1)
mantic
Released (2.4.3-1)
Patches:
upstream: https://github.com/libexpat/libexpat/pull/534

firefox
Launchpad, Ubuntu, Debian
bionic
Released (98.0+build3-0ubuntu0.18.04.2)
focal
Released (98.0+build3-0ubuntu0.20.04.2)
impish
Released (98.0+build3-0ubuntu0.21.10.2)
trusty Does not exist

upstream
Released (98)
jammy
Released (1:1snap1-0ubuntu1)
kinetic
Released (1:1snap1-0ubuntu1)
lunar
Released (1:1snap1-0ubuntu1)
xenial Ignored
(end of standard support, was needs-triage)
mantic
Released (1:1snap1-0ubuntu1)
Patches:

upstream: https://hg.mozilla.org/releases/mozilla-release/rev/1e64d3320bbc46520fecfd57e288278a92fdd6ae
gdcm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system expat)
focal Not vulnerable
(uses system expat)
hirsute Not vulnerable
(uses system expat)
impish Not vulnerable
(uses system expat)
trusty Not vulnerable
(uses system expat)
upstream Needs triage

xenial Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
mantic Not vulnerable
(uses system expat)
ghostscript
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
thunderbird
Launchpad, Ubuntu, Debian
focal Not vulnerable

hirsute Ignored
(end of life)
trusty Does not exist

upstream Needs triage

kinetic Ignored
(end of life, was needs-triage)
lunar Not vulnerable

jammy Not vulnerable

impish Ignored
(end of life)
bionic Ignored
(end of standard support, was needs-triage)
xenial Ignored
(end of standard support, was needs-triage)
mantic Not vulnerable

insighttoolkit4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(uses system expat)
impish Ignored
(end of life)
trusty Does not exist

upstream Needs triage

hirsute Ignored
(end of life)
xenial Needs triage

focal Not vulnerable
(uses system expat)
jammy Not vulnerable
(uses system expat)
kinetic Not vulnerable
(uses system expat)
lunar Not vulnerable
(uses system expat)
mantic Does not exist

insighttoolkit
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Does not exist

upstream Needs triage

xenial Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

matanza
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

impish Ignored
(end of life)
trusty Does not exist

upstream Needs triage

hirsute Ignored
(end of life)
xenial Needs triage

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

lunar Needs triage

mantic Needs triage

smart
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Does not exist

upstream Needs triage

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

kinetic Does not exist

lunar Does not exist

mantic Does not exist

swish-e
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

impish Ignored
(end of life)
trusty Does not exist

upstream Needs triage

hirsute Ignored
(end of life)
xenial Needs triage

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

lunar Needs triage

mantic Needs triage

tdom
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

hirsute Ignored
(end of life)
impish Ignored
(end of life)
trusty Does not exist

upstream Needs triage

xenial Needs triage

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

lunar Needs triage

mantic Needs triage

texlive-bin
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code-not-compiled)
focal Not vulnerable
(code-not-compiled)
hirsute Not vulnerable
(code-not-compiled)
impish Not vulnerable
(code-not-compiled)
trusty Does not exist

upstream Needs triage

xenial Not vulnerable
(code-not-compiled)
jammy Not vulnerable
(code-not-compiled)
kinetic Not vulnerable
(code-not-compiled)
lunar Not vulnerable
(code-not-compiled)
mantic Not vulnerable
(code-not-compiled)
vnc4
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Needs triage

upstream Needs triage

xenial Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

vtk
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Needs triage

upstream Needs triage

xenial Needs triage

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

wbxml2
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

hirsute Ignored
(end of life)
impish Ignored
(end of life)
trusty Does not exist

upstream Needs triage

xenial Needs triage

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

lunar Needs triage

mantic Needs triage

xmlrpc-c
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

hirsute Ignored
(end of life)
impish Ignored
(end of life)
trusty Needs triage

upstream Needs triage

xenial Needs triage

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

lunar Needs triage

mantic Needs triage

libxmltok
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(code not present)
focal Not vulnerable
(code not present)
hirsute Ignored
(end of life)
impish Not vulnerable
(code not present)
jammy Not vulnerable
(code not present)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Not vulnerable
(code not present)
kinetic Not vulnerable
(code not present)
lunar Not vulnerable
(code not present)
mantic Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H