CVE-2023-52426 : libexpat through 2.5.0 allows recursive XML Entity Expansion if XML

libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.

Published 2024-02-04 20:15:46

Updated 2024-03-07 17:15:12

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2023-52426

Libexpat Project » Libexpat
Versions up to, including, (<=) 2.5.0
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.02%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 3 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST	2024-02-09
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.

Assigned by: nvd@nist.gov (Primary)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PNRIHC7DVVRAIWFRGV23Y6UZXFBXSQDB/

[SECURITY] Fedora 39 Update: mingw-expat-2.6.0-1.fc39 - package-announce - Fedora Mailing-Lists

CVEs referencing this url
https://github.com/libexpat/libexpat/pull/777

Fix issues for compilation with XML_DTD undefined by hartwork · Pull Request #777 · libexpat/libexpat · GitHub
Vendor Advisory
https://github.com/libexpat/libexpat/commit/0f075ec8ecb5e43f8fdca5182f8cca4703da0404

lib|xmlwf|cmake: Extend scope of billion laughs attack protection · libexpat/libexpat@0f075ec · GitHub
Patch;Vendor Advisory
https://cwe.mitre.org/data/definitions/776.html

CWE - CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') (4.13)
Technical Description
https://security.netapp.com/advisory/ntap-20240307-0005/

CVE-2023-52426 libexpat Vulnerability in NetApp Products | NetApp Product Security
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNUBSGZFEZOBHJFTAD42SAN4ATW2VEMV/

[SECURITY] Fedora 38 Update: mingw-expat-2.6.0-1.fc38 - package-announce - Fedora Mailing-Lists

CVEs referencing this url

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