CVE-2024-45491

CRITICAL EPSS 62.4%

Published Aug 30, 20241y ago · Modified Jun 17, 20262w ago

9.8 CVSS 3.1

Critical

Published Aug 30, 2024 1y ago

Last Modified Jun 17, 2026 2w ago

Description

An issue was discovered in libexpat before 2.6.3. dtdCopy in xmlparse.c can have an integer overflow for nDefaultAtts on 32-bit platforms (where UINT_MAX equals SIZE_MAX).

CVSS Details

Base Score

9.8

Exploitability

3.9

Impact

5.9

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

EPSS Exploit Probability

62.4% percentile

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 1

Vendor	Product	Version	Range
libexpat_project	libexpat	*	<2.6.3

References 6

cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-613116.html
github.com https://github.com/libexpat/libexpat/issues/888

Issue Tracking
github.com https://github.com/libexpat/libexpat/pull/891

Patch
lists.debian.org https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html
security.netapp.com https://security.netapp.com/advisory/ntap-20241018-0003/

Remediation

github.com https://github.com/libexpat/libexpat/pull/891

Patch