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CVE-2009-2473

Estado: ModificadaMedia (4.3)—

neon before 0.28.6, when expat is used, 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, a similar issue to CVE-2003-1564.

CVSS

Probabilidad de explotación (EPSS)

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 (1)

Webdav — Neon

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2009-2473",
  "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": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2009-08-21T17:30:00.327",
  "references": [
    {
      "url": "http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2013-0131.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/36371",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://support.apple.com/kb/HT4435",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:221",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/2341",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/52633",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9461",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.manyfish.co.uk/pipermail/neon/2009-August/001044.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.manyfish.co.uk/pipermail/neon/2009-August/001045.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00004.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2013-0131.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/36371",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://support.apple.com/kb/HT4435",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:221",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.vupen.com/english/advisories/2009/2341",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/52633",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9461",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00924.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00945.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "neon before 0.28.6, when expat is used, 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, a similar issue to CVE-2003-1564."
    },
    {
      "lang": "es",
      "value": "neon, en versiones anteriores a la 0.28.6, cuando se usa expat, no detecta adecuadamente la recursividad en la expansión de una entidad, esto permite a atacantes dependientes del contexto provocar una denegación de servicio (consumo de la memoria y CPU), mediante un documento XML manipulado que contiene un gran número de referencias anidadas a entidades, una cuestión similar a CVE-2003-1564."
    }
  ],
  "lastModified": "2026-06-16T23:09:31.587",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:webdav:neon:0.28.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "632E9CF9-8652-4FCB-B387-467B137C8CC7"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "vendorComments": [
    {
      "comment": "Updated neon packages for Red Hat Enterprise Linux 4 and 5 were released via:\nhttps://rhn.redhat.com/errata/RHSA-2009-1452.html\n\nEmbedded copy of the neon library is included in the versions of gnome-vfs2 packages as shipped with Red Hat Enteprise Linux 4 and Red Hat Enteprise Linux 5.  The Red Hat Security Response Team has rated this issue as having low security impact on gnome-vfs2, future updates may address this flaw.",
      "lastModified": "2009-09-22T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}