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CVE-2003-1564

nvd nist
Published: Dec 31, 2003Modified: Apr 16, 2026

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6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Exploitability: 2.8 / Impact: 3.6
Source: NVD

Description

libxml2, possibly before 2.5.0, does not properly detect recursion during entity expansion, which allows context-dependent attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, aka the "billion laughs attack."

Affected (1)

Products: Xmlsoft: Libxml2
Xmlsoft
1 product
Libxml2
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Libxml2
Before 2.5.0

Related CWEs

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.

References (12)

Source: cve@mitre.org
Mailing ListPatch
Source: cve@mitre.org
Broken Link
Source: cve@mitre.org
Issue Tracking
Source: cve@mitre.org
Broken Link
Source: cve@mitre.org
Broken Link
Source: cve@mitre.org
Release Notes
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListPatch
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes

Timeline

No history available yet.