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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 'bill\u00f3n de risas'."}], "evaluatorComment": "<a href=\"http://cwe.mitre.org/data/definitions/611.html\" target=\"_blank\">CWE-611: Improper Restriction of XML External Entity Reference ('XXE')</a>", "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&id=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": 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"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&action=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"}]}

{"affected_release": [{"advisory": "RHSA-2014:1885", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "libxml2-0:2.6.26-2.1.25.el5_11", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2014-11-20T00:00:00Z"}, {"advisory": "RHSA-2014:1655", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "libxml2-0:2.7.6-17.el6_6.1", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2014-10-16T00:00:00Z"}, {"advisory": "RHSA-2014:1655", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "libxml2-0:2.9.1-5.el7_0.1", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2014-10-16T00:00:00Z"}], "bugzilla": {"description": "libxml2: denial of service via recursive entity expansion", "id": "1149084", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1149084"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "status": "verified"}, "cwe": "CWE-400", "details": ["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.", "A denial of service flaw was found in libxml2, a library providing support to read, modify and write XML and HTML files. A remote attacker could provide a specially crafted XML file that, when processed by an application using libxml2, would lead to excessive CPU consumption (denial of service) based on excessive entity substitutions, even if entity substitution was disabled, which is the parser default behavior."], "name": "CVE-2014-3660", "public_date": "2014-10-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2014-3660\nhttps://nvd.nist.gov/vuln/detail/CVE-2014-3660"], "threat_severity": "Moderate"}

{}