CVE-2015-7941

Estado: ModificadaMedia (4.3)—
libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities.
CVSS

Versión: 2.0
Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Puntuación base: 4.3
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 3.06%
Percentil entre todas las CVEs puntuadas: 87
Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (2)

Canonical — Ubuntu Linux Xmlsoft — Libxml2
CWE

CWE-119
Referencias

JSON original (NVD)

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{
  "id": "CVE-2015-7941",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2015-11-18T16:59:04.333",
  "references": [
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177341.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177381.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2015-12/msg00120.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2016-01/msg00031.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=145382616617563&w=2",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2015-2549.html",
      "source": "cve@mitre.org"
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    {
      "url": "http://rhn.redhat.com/errata/RHSA-2015-2550.html",
      "source": "cve@mitre.org"
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    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1089.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.debian.org/security/2015/dsa-3430",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2015/10/22/5",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.openwall.com/lists/oss-security/2015/10/22/8",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/74241",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1034243",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-2812-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://xmlsoft.org/news.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugzilla.gnome.org/show_bug.cgi?id=744980",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://git.gnome.org/browse/libxml2/commit/?id=9b8512337d14c8ddf662fcb98b0135f225a1c489",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://git.gnome.org/browse/libxml2/commit/?id=a7dfab7411cbf545f359dd3157e5df1eb0e7ce31",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/201701-37",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177341.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177381.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://lists.opensuse.org/opensuse-updates/2016-01/msg00031.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://marc.info/?l=bugtraq&m=145382616617563&w=2",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://rhn.redhat.com/errata/RHSA-2015-2549.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://rhn.redhat.com/errata/RHSA-2016-1089.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.debian.org/security/2015/dsa-3430",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.openwall.com/lists/oss-security/2015/10/22/5",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "http://www.openwall.com/lists/oss-security/2015/10/22/8",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/74241",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1034243",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.ubuntu.com/usn/USN-2812-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://xmlsoft.org/news.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.gnome.org/show_bug.cgi?id=744980",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.gnome.org/browse/libxml2/commit/?id=9b8512337d14c8ddf662fcb98b0135f225a1c489",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.gnome.org/browse/libxml2/commit/?id=a7dfab7411cbf545f359dd3157e5df1eb0e7ce31",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.gentoo.org/glsa/201701-37",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities."
    },
    {
      "lang": "es",
      "value": "libxml2 2.9.2 no detiene adecuadamente el análisis de entrada no válido, lo que permite a atacantes dependientes del contexto causar una denegación de servicio (lectura fuera de rango y caída de libxml2) a través de datos XML manipulados en la función (1) xmlParseEntityDecl o (2) xmlParseConditionalSections en parser.c, según lo demostrado por entidades non-terminated."
    }
  ],
  "lastModified": "2026-06-17T00:33:25.530",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B6B7CAD7-9D4E-4FDB-88E3-1E583210A01F"
            },
            {
              "criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
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  ],
  "evaluatorComment": "\"context dependent\" seems to point to MiTM attack due to: If a user or automated system were tricked into opening a specially\ncrafted document, an attacker could possibly cause libxml2 to crash,\nresulting in a denial of service. This issue only affected\nUbuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 15.04.",
  "sourceIdentifier": "cve@mitre.org"
}