Vulnerability Monitor

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CVE-2021-46143

In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.1, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 8 products from libexpat_project, from netapp, from netapp and 5 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-01-06T04:15:07.017

Last Modified

2025-05-05T17:17:28.820

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.1 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-190
Type: Secondary
CWE-190

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	libexpat_project	libexpat	< 2.4.3	Yes
Application	netapp	active_iq_unified_manager	-	Yes
Application	netapp	clustered_data_ontap	-	Yes
Application	netapp	hci_baseboard_management_controller	h610c	Yes
Application	netapp	hci_baseboard_management_controller	h610s	Yes
Application	netapp	hci_baseboard_management_controller	h615c	Yes
Application	netapp	oncommand_workflow_automation	-	Yes
Application	netapp	solidfire_\&_hci_management_node	-	Yes
Application	tenable	nessus	< 8.15.3	Yes
Application	tenable	nessus	< 10.1.1	Yes
Application	siemens	sinema_remote_connect_server	< 3.1	Yes

References

http://www.openwall.com/lists/oss-security/2022/01/17/3 Mailing List, Patch, Third Party Advisory ([email protected])
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory ([email protected])
https://github.com/libexpat/libexpat/issues/532 Exploit, Issue Tracking, Patch, Third Party Advisory ([email protected])
https://github.com/libexpat/libexpat/pull/538 Patch, Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/202209-24 Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20220121-0006/ Third Party Advisory ([email protected])
https://www.debian.org/security/2022/dsa-5073 Third Party Advisory ([email protected])
https://www.tenable.com/security/tns-2022-05 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2022/01/17/3 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libexpat/libexpat/issues/532 Exploit, Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/libexpat/libexpat/pull/538 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202209-24 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20220121-0006/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2022/dsa-5073 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.tenable.com/security/tns-2022-05 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For libexpat_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.