CVE-2023-28484

MediumCVSS 6.5/10Last modified Oct 14, 2026

Description

In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

Vendor	Product	Versions
n/a	n/a	n/a
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	>= V3.1.0, < V3.1.5

References

https://gitlab.gnome.org/GNOME/libxml2/-/issues/491Exploit, Issue Tracking, Patch, Vendor Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4Release Notes
https://lists.debian.org/debian-lts-announce/2023/04/msg00031.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230601-0006/
https://security.netapp.com/advisory/ntap-20240201-0005/
https://gitlab.gnome.org/GNOME/libxml2/-/issues/491Exploit, Issue Tracking, Patch, Vendor Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4Release Notes
https://lists.debian.org/debian-lts-announce/2023/04/msg00031.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230601-0006/
https://security.netapp.com/advisory/ntap-20240201-0005/
https://cert-portal.siemens.com/productcert/html/ssa-341067.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://cert-portal.siemens.com/productcert/html/ssa-556635.html
https://cert-portal.siemens.com/productcert/html/ssa-625862.html
https://cert-portal.siemens.com/productcert/html/ssa-769027.html

Timeline

Published: Apr 24, 2023
Last modified: Oct 14, 2026
NVD status: Modified

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