CVE-2022-43680

expat: use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En libexpat versiones hasta 2.4.9, se presenta un uso de memoria previamente liberada causado por la destrucción excesiva de un DTD compartido en XML_ExternalEntityParserCreate en situaciones fuera de memoria

A use-after-free flaw was found in the Expat package, caused by destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations. This may lead to availability disruptions.

Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products, and is packaged under Red Hat JBoss Core Services to allow for faster distribution of updates, and for a more consistent update experience. This release of Red Hat JBoss Core Services Apache HTTP Server 2.4.51 Service Pack 2 serves as a replacement for Red Hat JBoss Core Services Apache HTTP Server 2.4.51 Service Pack 1, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include bypass, denial of service, double free, out of bounds read, out of bounds write, and use-after-free vulnerabilities.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-10-24 CVE Reserved
2022-10-24 CVE Published
2022-12-19 First Exploit
2024-08-03 CVE Updated
2025-04-18 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-416: Use After Free

CAPEC

References (19)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2023/12/28/5	Mailing List
http://www.openwall.com/lists/oss-security/2024/01/03/5	Mailing List
https://lists.debian.org/debian-lts-announce/2022/10/msg00033.html	Mailing List
https://security.netapp.com/advisory/ntap-20221118-0007	Third Party Advisory

URL	Date	SRC
https://github.com/Trinadh465/external_expat-2.1.0_CVE-2022-43680	2023-12-18
https://github.com/nidhihcl/external_expat_2.1.0_CVE-2022-43680	2022-12-19
https://github.com/libexpat/libexpat/issues/649	2024-08-03
https://github.com/libexpat/libexpat/pull/616	2024-08-03
https://github.com/libexpat/libexpat/pull/650	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AJ5VY2VYXE4WTRGQ6LMGLF6FV3SY37YE	2024-01-21
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BY4OPSIB33ETNUXZY2UPZ4NGQ3OKDY4D	2024-01-21
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DPQVIF6TOJNY2T3ZZETFKR4G34FFREBQ	2024-01-21
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFCOMBSOJKLIKCGCJWHLJXO4EVYBG7AR	2024-01-21
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUJ2BULJTZ2BMSKQHB6US674P55UCWWS	2024-01-21
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XG5XOOB7CD55CEE6OJYKSACSIMQ4RWQ6	2024-01-21
https://security.gentoo.org/glsa/202210-38	2024-01-21
https://www.debian.org/security/2022/dsa-5266	2024-01-21
https://access.redhat.com/security/cve/CVE-2022-43680	2024-01-25
https://bugzilla.redhat.com/show_bug.cgi?id=2140059	2024-01-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netapp Search vendor "Netapp"	H300s Firmware Search vendor "Netapp" for product "H300s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H300s Search vendor "Netapp" for product "H300s"	-	-	Safe
Netapp Search vendor "Netapp"	H500s Firmware Search vendor "Netapp" for product "H500s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H500s Search vendor "Netapp" for product "H500s"	-	-	Safe
Netapp Search vendor "Netapp"	H700s Firmware Search vendor "Netapp" for product "H700s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H700s Search vendor "Netapp" for product "H700s"	-	-	Safe
Netapp Search vendor "Netapp"	H410s Firmware Search vendor "Netapp" for product "H410s Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410s Search vendor "Netapp" for product "H410s"	-	-	Safe
Netapp Search vendor "Netapp"	H410c Firmware Search vendor "Netapp" for product "H410c Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	H410c Search vendor "Netapp" for product "H410c"	-	-	Safe
Netapp Search vendor "Netapp"	Hci Compute Node Firmware Search vendor "Netapp" for product "Hci Compute Node Firmware"	-	-	Affected	in	Netapp Search vendor "Netapp"	Hci Compute Node Search vendor "Netapp" for product "Hci Compute Node"	-	-	Safe
Libexpat Project Search vendor "Libexpat Project"		Libexpat Search vendor "Libexpat Project" for product "Libexpat"				<= 2.4.9 Search vendor "Libexpat Project" for product "Libexpat" and version " <= 2.4.9"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				36 Search vendor "Fedoraproject" for product "Fedora" and version "36"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected
Netapp Search vendor "Netapp"		Active Iq Unified Manager Search vendor "Netapp" for product "Active Iq Unified Manager"				-		vmware_vsphere		Affected
Netapp Search vendor "Netapp"		Oncommand Workflow Automation Search vendor "Netapp" for product "Oncommand Workflow Automation"				-		-		Affected
Netapp Search vendor "Netapp"		Solidfire \& Hci Management Node Search vendor "Netapp" for product "Solidfire \& Hci Management Node"				-		-		Affected