libexpat up to 2.4.3 doProlog integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in libexpat up to 2.4.3 and classified as critical. The affected element is the function doProlog. Executing a manipulation can lead to integer overflow. This vulnerability is tracked as CVE-2022-23990. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in libexpat up to 2.4.3. This vulnerability affects the function doProlog. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 01/26/2022. The advisory is shared for download at github.com. This vulnerability was named CVE-2022-23990 since 01/26/2022. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 207710 (Oracle Linux 8 : expat (ELSA-2024-6989)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.4.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (207710) and CERT Bund (WID-SEC-2022-0499). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • NetApp Data ONTAP
  • Autodesk AutoCAD
  • Broadcom Fabric OS
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • HPE Switch
  • Gentoo Linux
  • Tenable Security Nessus
  • Unify OpenScape Xpert
  • HCL Commerce
  • IBM MQ
  • Open Source expat
  • Meinberg LANTIME
  • Juniper JUNOS
  • Tenable Security Nessus Network Monitor
  • IBM App Connect Enterprise

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 207710
Nessus Name: Oracle Linux 8 : expat (ELSA-2024-6989)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libexpat 2.4.4
Patch: github.com

Timelineinfo

01/26/2022 🔍
01/26/2022 +0 days 🔍
01/26/2022 +0 days 🔍
01/02/2026 +1437 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2022-23990 (🔍)
GCVE (CVE): GCVE-0-2022-23990
GCVE (VulDB): GCVE-100-191692
CERT Bund: WID-SEC-2022-0499 - expat: Schwachstelle ermöglicht Codeausführung

Entryinfo

Created: 01/26/2022 23:01
Updated: 01/02/2026 09:55
Changes: 01/26/2022 23:01 (39), 01/29/2022 10:31 (1), 09/30/2024 12:25 (16), 05/06/2025 04:53 (19), 12/08/2025 16:46 (7), 01/02/2026 09:55 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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