CVE-2014-3660 (GCVE-0-2014-3660)
Vulnerability from cvelistv5 – Published: 2014-11-04 16:00 – Updated: 2024-08-06 10:50
VLAI
EPSS
VEX
Summary
parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the "billion laughs" attack.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
23 references
Date Public
2014-10-16 00:00
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{
"lang": "en",
"value": "parser.c in libxml2 before 2.9.2 does not properly prevent entity expansion even when entity substitution has been disabled, which allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted XML document containing a large number of nested entity references, a variant of the \"billion laughs\" attack."
},
{
"lang": "es",
"value": "parser.c en libxml2 anterior a 2.9.2 no previene debidamente la expansi\u00f3n de entidades incluso cuando la substituci\u00f3n de entidades haya sido deshabilitada, lo que permite a atacantes dependientes de contexto causar una denegaci\u00f3n de servicio (consumo de CPU) a trav\u00e9s de un documento XML manipualdo que contiene un n\u00famero grande de referencias de entidades anidadas, una variante del ataque del \u0027bill\u00f3n de risas\u0027."
}
],
"evaluatorComment": "\u003ca href=\"http://cwe.mitre.org/data/definitions/611.html\" target=\"_blank\"\u003eCWE-611: Improper Restriction of XML External Entity Reference (\u0027XXE\u0027)\u003c/a\u003e",
"id": "CVE-2014-3660",
"lastModified": "2026-05-06T22:30:45.220",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2014-11-04T16:55:06.043",
"references": [
{
"source": "secalert@redhat.com",
"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10705"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.apple.com/archives/security-announce/2015/Aug/msg00002.html"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.opensuse.org/opensuse-updates/2014-10/msg00034.html"
},
{
"source": "secalert@redhat.com",
"url": "http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html"
},
{
"source": "secalert@redhat.com",
"url": "http://rhn.redhat.com/errata/RHSA-2014-1655.html"
},
{
"source": "secalert@redhat.com",
"url": "http://rhn.redhat.com/errata/RHSA-2014-1885.html"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/59903"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/61965"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/61966"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/61991"
},
{
"source": "secalert@redhat.com",
"url": "http://www.debian.org/security/2014/dsa-3057"
},
{
"source": "secalert@redhat.com",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2014:244"
},
{
"source": "secalert@redhat.com",
"tags": [
"Patch"
],
"url": "http://www.openwall.com/lists/oss-security/2014/10/17/7"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/bid/70644"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-2389-1"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/attachment.cgi?id=944444\u0026action=diff"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1149084"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/kb/HT205030"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/kb/HT205031"
},
{
"source": "secalert@redhat.com",
"url": "https://www.ncsc.nl/actueel/nieuwsberichten/kwetsbaarheid-ontdekt-in-libxml2.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10705"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.apple.com/archives/security-announce/2015/Aug/msg00002.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-updates/2014-10/msg00034.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2014-1655.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2014-1885.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/59903"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/61965"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/61966"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/61991"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.debian.org/security/2014/dsa-3057"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2014:244"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Patch"
],
"url": "http://www.openwall.com/lists/oss-security/2014/10/17/7"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/70644"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-2389-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/attachment.cgi?id=944444\u0026action=diff"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1149084"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/kb/HT205030"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://support.apple.com/kb/HT205031"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.ncsc.nl/actueel/nieuwsberichten/kwetsbaarheid-ontdekt-in-libxml2.html"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T12:25:32+00:00",
"cve": "CVE-2014-3660",
"id": "CVE-2014-3660",
"initial_release_date": "2014-10-16T00:00:00+00:00",
"product_status:fixed": "521",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "libxml2: denial of service via recursive entity expansion",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2014/cve-2014-3660.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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