CVE-2022-43680

Published: 24 October 2022

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.

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!)
mdeslaur	apache2 uses system expat apr-util uses system expat cmake uses system expat ghostscript uses system expat

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!)

mdeslaur

apache2 uses system expat
apr-util uses system expat
cmake uses system expat
ghostscript uses system expat

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
firefox Launchpad, Ubuntu, Debian	focal	Ignored (bundled deps handled by upstream in new versions)
	jammy	Not vulnerable (code not present)
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	kinetic	Not vulnerable (code not present)
	lunar	Not vulnerable (code not present)
	bionic	Ignored (end of standard support, was needs-triage)
	xenial	Ignored (end of standard support)
xmlrpc-c Launchpad, Ubuntu, Debian	kinetic	Ignored (end of life, was needs-triage)
	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	lunar	Needs triage
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
cableswig Launchpad, Ubuntu, Debian	jammy	Does not exist
	bionic	Does not exist
	focal	Does not exist
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
expat Launchpad, Ubuntu, Debian	upstream	Needs triage
	trusty	Released (2.1.0-4ubuntu1.4+esm7) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	kinetic	Released (2.4.8-2ubuntu0.22.10.1)
	bionic	Released (2.2.5-3ubuntu0.8)
	focal	Released (2.2.9-1ubuntu0.6)
	jammy	Released (2.4.7-1ubuntu0.2)
	xenial	Released (2.1.0-7ubuntu0.16.04.5+esm7) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	lunar	Released (2.5.0-1)
	Patches: upstream: https://github.com/libexpat/libexpat/commit/56967f83d68d5fc750f9e66a9a76756c94c7c173
apache2 Launchpad, Ubuntu, Debian	trusty	Not vulnerable (uses system expat)
	xenial	Not vulnerable (uses system expat)
	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	upstream	Needs triage
	kinetic	Not vulnerable (uses system expat)
	lunar	Not vulnerable (uses system expat)
apr-util Launchpad, Ubuntu, Debian	trusty	Not vulnerable (uses system expat)
	xenial	Not vulnerable (uses system expat)
	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	upstream	Needs triage
	kinetic	Not vulnerable (uses system expat)
	lunar	Not vulnerable (uses system expat)
cmake Launchpad, Ubuntu, Debian	trusty	Ignored (end of standard support)
	xenial	Not vulnerable (uses system expat)
	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	upstream	Needs triage
	kinetic	Not vulnerable (uses system expat)
	lunar	Not vulnerable (uses system expat)
ghostscript Launchpad, Ubuntu, Debian	trusty	Ignored (end of standard support)
	xenial	Not vulnerable (uses system expat)
	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	upstream	Needs triage
	kinetic	Not vulnerable (uses system expat)
	lunar	Not vulnerable (uses system expat)
texlive-bin Launchpad, Ubuntu, Debian	trusty	Ignored (end of standard support)
	xenial	Not vulnerable (code-not-compiled)
	bionic	Not vulnerable (code-not-compiled)
	focal	Not vulnerable (code-not-compiled)
	jammy	Not vulnerable (code-not-compiled)
	upstream	Needs triage
	lunar	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
vnc4 Launchpad, Ubuntu, Debian	trusty	Needs triage
	bionic	Needs triage
	focal	Does not exist
	jammy	Does not exist
	upstream	Needs triage
	xenial	Needs triage
wbxml2 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	lunar	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	xenial	Needs triage
swish-e Launchpad, Ubuntu, Debian	trusty	Ignored (end of standard support)
	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	upstream	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	xenial	Needs triage
	lunar	Needs triage
ayttm Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
cadaver Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Needs triage
coin3 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
	kinetic	Not vulnerable (uses system expat)
	lunar	Not vulnerable (uses system expat)
gdcm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	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)
	lunar	Not vulnerable (uses system expat)
insighttoolkit Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
insighttoolkit4 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	kinetic	Not vulnerable (uses system expat)
	xenial	Needs triage
	lunar	Not vulnerable (uses system expat)
libxmltok Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Needs triage
matanza Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Needs triage
smart Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code-not-compiled)
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Not vulnerable (code-not-compiled)
tdom Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Needs triage
thunderbird Launchpad, Ubuntu, Debian	focal	Ignored (bundled deps handled by upstream in new versions)
	jammy	Ignored (bundled deps handled by upstream in new versions)
	lunar	Ignored (bundled deps handled by upstream in new versions)
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	bionic	Ignored (end of standard support, was needs-triage)
	xenial	Ignored (end of standard support)
vtk Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Does not exist
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage

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

References

Bugs

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1022743

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