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

Author	Note
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.

Author

Note

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

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package	Release	Status
apache2 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)
	jammy	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
	lunar	Not vulnerable (code-not-compiled)
	trusty	Not vulnerable (code-not-compiled)
	upstream	Needs triage
	xenial	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)
	jammy	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
	lunar	Not vulnerable (code-not-compiled)
	trusty	Not vulnerable (code-not-compiled)
	upstream	Needs triage
	xenial	Not vulnerable (code-not-compiled)
ayttm Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	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	Needs triage
cableswig Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	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	Needs triage
cadaver Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	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)
	jammy	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
	lunar	Not vulnerable (code-not-compiled)
	trusty	Does not exist
	upstream	Needs triage
	xenial	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)
	jammy	Not vulnerable (uses system expat)
	kinetic	Not vulnerable (uses system expat)
	lunar	Not vulnerable (uses system expat)
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
expat Launchpad, Ubuntu, Debian	bionic	Released (2.2.5-3ubuntu0.4)
	focal	Released (2.2.9-1ubuntu0.2)
	hirsute	Ignored (reached end-of-life)
	impish	Released (2.4.1-2ubuntu0.1)
	jammy	Released (2.4.3-1)
	kinetic	Released (2.4.3-1)
	lunar	Released (2.4.3-1)
	trusty	Released (2.1.0-4ubuntu1.4+esm4)
	upstream	Needs triage
	xenial	Released (2.1.0-7ubuntu0.16.04.5+esm2)
	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)
	jammy	Released (1:1snap1-0ubuntu1)
	kinetic	Released (1:1snap1-0ubuntu1)
	lunar	Released (1:1snap1-0ubuntu1)
	trusty	Does not exist
	upstream	Released (98)
	xenial	Needs triage
	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)
	jammy	Not vulnerable (uses system expat)
	kinetic	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)
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)
	jammy	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
	lunar	Not vulnerable (code-not-compiled)
	trusty	Does not exist
	upstream	Needs triage
	xenial	Not vulnerable (code-not-compiled)
insighttoolkit Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	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	Needs triage
insighttoolkit4 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	Needs triage
libxmltok Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code not present)
	focal	Not vulnerable (code not present)
	hirsute	Ignored (reached end-of-life)
	impish	Not vulnerable (code not present)
	jammy	Not vulnerable (code not present)
	kinetic	Not vulnerable (code not present)
	lunar	Not vulnerable (code not present)
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Not vulnerable (code not present)
matanza Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	Needs triage
smart Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code-not-compiled)
	focal	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	Not vulnerable (code-not-compiled)
swish-e Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	Needs triage
tdom Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	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)
	jammy	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
	lunar	Not vulnerable (code-not-compiled)
	trusty	Does not exist
	upstream	Needs triage
	xenial	Not vulnerable (code-not-compiled)
thunderbird Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	Needs triage
vnc4 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
vtk Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
wbxml2 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	Needs triage
xmlrpc-c Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage

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

References

Bugs

Join the discussion

Canonical is offering Expanded Security Maintenance

Canonical is offering Ubuntu Expanded Security Maintenance (ESM) for security fixes and essential packages.

Find out more about ESM ›