libexpat through 2.5.0 allows a denial of service (resource consumption) because many full reparsings are required in the case of a large token for which multiple buffer fills are needed.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/libexpat/libexpat/pull/789 Exploit, Vendor Advisory
- https://github.com/libexpat/libexpat/pull/789 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · libexpat_projectNVD modified 2026-10-15 01:17
Affected (CPE criteria) 1
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
References 16
- http://www.openwall.com/lists/oss-security/2024/03/20/5
- https://github.com/libexpat/libexpat/pull/789 Exploit, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/
- https://security.netapp.com/advisory/ntap-20240614-0003/
- http://www.openwall.com/lists/oss-security/2024/03/20/5
- https://github.com/libexpat/libexpat/pull/789 Exploit, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2024/04/msg00006.html
- https://lists.debian.org/debian-lts-announce/2024/09/msg00036.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/
- https://security.netapp.com/advisory/ntap-20240614-0003/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-784301.html