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CVE-2009-3639

Estado: ModificadaMedia (5.8)—

The mod_tls module in ProFTPD before 1.3.2b, and 1.3.3 before 1.3.3rc2, when the dNSNameRequired TLS option is enabled, does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 client certificate, which allows remote attackers to bypass intended client-hostname restrictions via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

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)

Proftpd — Proftpd

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2009-3639",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2009-10-28T14:30:00.217",
  "references": [
    {
      "url": "http://bugs.proftpd.org/show_bug.cgi?id=3275",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://marc.info/?l=oss-security&m=125630966510672&w=2",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://marc.info/?l=oss-security&m=125632960508211&w=2",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/37131",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/37219",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.debian.org/security/2009/dsa-1925",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:288",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/36804",
      "tags": [
        "Patch"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=530719",
      "tags": [
        "Patch"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/53936",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00642.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00649.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://bugs.proftpd.org/show_bug.cgi?id=3275",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://marc.info/?l=oss-security&m=125630966510672&w=2",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://marc.info/?l=oss-security&m=125632960508211&w=2",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/37131",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/37219",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2009/dsa-1925",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2009:288",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/36804",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=530719",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/53936",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00642.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00649.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-310"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The mod_tls module in ProFTPD before 1.3.2b, and 1.3.3 before 1.3.3rc2, when the dNSNameRequired TLS option is enabled, does not properly handle a '\\0' character in a domain name in the Subject Alternative Name field of an X.509 client certificate, which allows remote attackers to bypass intended client-hostname restrictions via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408."
    },
    {
      "lang": "es",
      "value": "El módulo mod_tls en ProFTPD anterior v1.3.2b, y v1.3.3 anterior v1.3.3rc2, cuando la opción dNSNameRequired TLS es activada, no maneja adecuadamente el caracter '/0' en un nombre de dominio, dentro del campo Subject Alternative Name de un certificado cliente X.509, lo que permite a atacantes remotos eludir las restricciones cliente-hostname a través de un certificado manipulado concedido por una Autoridad Certificadora legítima, esta relacionado con CVE-2009-2408."
    }
  ],
  "lastModified": "2026-06-16T23:12:04.440",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:*:a:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8ADC9F57-ADAE-4620-97ED-EBF96BEBF3A9",
              "versionEndIncluding": "1.3.2"
            },
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:1.3.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0629F25F-B9C6-4FC7-B67E-E6B38E59E60B"
            },
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:1.3.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "185E727C-E4DB-4713-866D-957D20838D97"
            },
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:1.3.2:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8B43EDB7-7B67-43E0-AAE9-F8120C6E607C"
            },
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:1.3.2:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F615B39A-5E30-454B-B851-14C5735578E3"
            },
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:1.3.2:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5884F593-C977-4AFC-9428-6A915D962C97"
            },
            {
              "criteria": "cpe:2.3:a:proftpd:proftpd:1.3.3:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "29FBDF30-0E17-46DA-8548-DEE5E3CD9EAB"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}