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
apache2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	kinetic	Not vulnerable (uses system expat)
	trusty	Not vulnerable (uses system expat)
	upstream	Needs triage
	xenial	Not vulnerable (uses system expat)
apr-util Launchpad, Ubuntu, Debian	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	kinetic	Not vulnerable (uses system expat)
	trusty	Not vulnerable (uses system expat)
	upstream	Needs triage
	xenial	Not vulnerable (uses system expat)
ayttm Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
cableswig Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
cadaver Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
cmake Launchpad, Ubuntu, Debian	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	kinetic	Not vulnerable (uses system expat)
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Not vulnerable (uses system expat)
coin3 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	kinetic	Not vulnerable (uses system expat)
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
expat Launchpad, Ubuntu, Debian	bionic	Released (2.2.5-3ubuntu0.8)
	focal	Released (2.2.9-1ubuntu0.6)
	jammy	Released (2.4.7-1ubuntu0.2)
	kinetic	Released (2.4.8-2ubuntu0.22.10.1)
	trusty	Released (2.1.0-4ubuntu1.4+esm7)
	upstream	Needs triage
	xenial	Released (2.1.0-7ubuntu0.16.04.5+esm7)
	Patches: upstream: https://github.com/libexpat/libexpat/commit/56967f83d68d5fc750f9e66a9a76756c94c7c173
firefox Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
gdcm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	kinetic	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 (uses system expat)
	focal	Not vulnerable (uses system expat)
	jammy	Not vulnerable (uses system expat)
	kinetic	Not vulnerable (uses system expat)
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Not vulnerable (uses system expat)
insighttoolkit Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
insighttoolkit4 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
libxmltok Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
matanza Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
smart Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code-not-compiled)
	focal	Does not exist
	jammy	Does not exist
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Not vulnerable (code-not-compiled)
swish-e Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
tdom Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
texlive-bin Launchpad, Ubuntu, Debian	bionic	Not vulnerable (code-not-compiled)
	focal	Not vulnerable (code-not-compiled)
	jammy	Not vulnerable (code-not-compiled)
	kinetic	Not vulnerable (code-not-compiled)
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Not vulnerable (code-not-compiled)
thunderbird Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
vnc4 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Does not exist
	jammy	Does not exist
	trusty	Needs triage
	upstream	Needs triage
	xenial	Needs triage
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
wbxml2 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	trusty	Ignored (out of standard support)
	upstream	Needs triage
	xenial	Needs triage
xmlrpc-c Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	jammy	Needs triage
	kinetic	Needs triage
	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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