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CVE-2007-4322

Estado: ModificadaMedia (6.8)—

BlockHosts before 2.0.4 does not properly parse (1) sshd and (2) vsftpd log files, which allows remote attackers to add arbitrary deny entries to the /etc/hosts.allow file and cause a denial of service by adding arbitrary IP addresses to a daemon log file, as demonstrated by connecting through ssh with a client protocol version identification containing an IP address string, or connecting through ftp with a username containing an IP address string, different vectors than CVE-2007-2765.

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)

AC Zoom — Blockhosts

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2007-4322",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2007-08-14T00:17:00.000",
  "references": [
    {
      "url": "http://osvdb.org/36515",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.aczoom.com/tools/blockhosts/CHANGES",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ossec.net/en/attacking-loganalysis.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://osvdb.org/36515",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.aczoom.com/tools/blockhosts/CHANGES",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ossec.net/en/attacking-loganalysis.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "BlockHosts before 2.0.4 does not properly parse (1) sshd and (2) vsftpd log files, which allows remote attackers to add arbitrary deny entries to the /etc/hosts.allow file and cause a denial of service by adding arbitrary IP addresses to a daemon log file, as demonstrated by connecting through ssh with a client protocol version identification containing an IP address string, or connecting through ftp with a username containing an IP address string, different vectors than CVE-2007-2765."
    },
    {
      "lang": "es",
      "value": "BlockHosts anterior a 2.0.4 no analiza sintácticamente de forma correcta los ficheros de log (1) sshd y (2) vsftpd, lo cual permite a atacantes remotos añadir entradas de denegación en el fichero /etc/hosts.allow y provocar una denegación de servicio añadiendo direcciones IP de su elección a un fichero de log de demonio, como ha sido demostrado conectándose a través de ssh con una identificación de versión del protocolo del cliente que contiene una cadena con la dirección IP, o conectándose a través de ftp con un nombre de usuario que contiene una cadena con la dirección IP, vectores diferentes de CVE-2007-2765."
    }
  ],
  "lastModified": "2026-06-16T22:43:48.647",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ac_zoom:blockhosts:2.0.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7C232288-25E7-4AE3-9F17-B66B76BD5E41"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}