libexpat up to 2.4.2 xmlparse.c build_model integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in libexpat up to 2.4.2. Impacted is the function build_model of the file xmlparse.c. The manipulation leads to integer overflow. This vulnerability is listed as CVE-2022-22823. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in libexpat up to 2.4.2. It has been rated as critical. This issue affects the function build_model of the file xmlparse.c. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The weakness was presented 01/10/2022. The advisory is shared at github.com. The identification of this vulnerability is CVE-2022-22823 since 01/08/2022. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 213995 (Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : xmltok library vulnerabilities (USN-7199-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.4.3 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 vulnerability database at Tenable (213995). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

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

NVD Base Score: 9.8
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: 213995
Nessus Name: Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 24.10 : xmltok library vulnerabilities (USN-7199-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libexpat 2.4.3
Patch: github.com

Timelineinfo

01/08/2022 🔍
01/10/2022 +2 days 🔍
01/10/2022 +0 days 🔍
05/06/2025 +1212 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2022-22823 (🔍)
GCVE (CVE): GCVE-0-2022-22823
GCVE (VulDB): GCVE-100-189953

Entryinfo

Created: 01/10/2022 21:16
Updated: 05/06/2025 02:57
Changes: 01/10/2022 21:16 (40), 01/13/2022 09:08 (1), 01/13/2025 16:42 (16), 05/06/2025 02:57 (19)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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