CVE-2024-45491

critical

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).

References

References
More

https://www.cisa.gov/news-events/ics-advisories/icsa-25-259-02

https://www.cisa.gov/news-events/ics-advisories/icsa-25-162-05

https://www.cisa.gov/news-events/ics-advisories/icsa-24-317-01

https://security.netapp.com/advisory/ntap-20241018-0003/

https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html

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

https://github.com/libexpat/libexpat/issues/888

https://cert-portal.siemens.com/productcert/html/ssa-613116.html

https://cert-portal.siemens.com/productcert/html/ssa-082556.html

Details

Source: Mitre, NVD

Published: 2024-08-30

Updated: 2026-05-12

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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