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CVE-2006-6171

Estado: ModificadaAlta (7.5)—

ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow. NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure. NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability

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 Project — Proftpd

CWE

Referencias

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{
  "id": "CVE-2006-6171",
  "cveTags": [
    {
      "tags": [
        "disputed"
      ],
      "sourceIdentifier": "cve@mitre.org"
    }
  ],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": true,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2006-11-30T15:28:00.000",
  "references": [
    {
      "url": "http://proftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292&r2=1.293&sortby=date",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/23174",
      "source": "cve@mitre.org"
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    {
      "url": "http://secunia.com/advisories/23179",
      "source": "cve@mitre.org"
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    {
      "url": "http://secunia.com/advisories/23184",
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    {
      "url": "http://secunia.com/advisories/23207",
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    {
      "url": "http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.502491",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.debian.org/security/2006/dsa-1218",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.debian.org/security/2006/dsa-1222",
      "source": "cve@mitre.org"
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    {
      "url": "http://www.gentoo.org/security/en/glsa/glsa-200611-26.xml",
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      "source": "cve@mitre.org"
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    {
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      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.trustix.org/errata/2006/0070",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=214820",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://proftp.cvs.sourceforge.net/proftp/proftpd/src/main.c?r1=1.292&r2=1.293&sortby=date",
      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://secunia.com/advisories/23179",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/23184",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/23207",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/23329",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.502491",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2006/dsa-1218",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.debian.org/security/2006/dsa-1222",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.gentoo.org/security/en/glsa/glsa-200611-26.xml",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandriva.com/security/advisories?name=MDKSA-2006:217-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openpkg.com/security/advisories/OpenPKG-SA-2006.035.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.trustix.org/errata/2006/0070",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=214820",
      "tags": [
        "Vendor Advisory"
      ],
      "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": "ProFTPD 1.3.0a and earlier does not properly set the buffer size limit when CommandBufferSize is specified in the configuration file, which leads to an off-by-two buffer underflow.  NOTE: in November 2006, the role of CommandBufferSize was originally associated with CVE-2006-5815, but this was an error stemming from a vague initial disclosure.  NOTE: ProFTPD developers dispute this issue, saying that the relevant memory location is overwritten by assignment before further use within the affected function, so this is not a vulnerability"
    },
    {
      "lang": "es",
      "value": "** IMPUGNADO ** ProFTPD 1.3.0a y versiones anteriores no asigna apropiadamente el límite del búfer cuando se especifica CommandBufferSize en el fichero de configuración, lo que conduce a un desbordamiento inferior de búfer por superación de límite (off-by-twho).\r\nNOTA: En Noviembre de 2006, el rol de CommandBufferSize fue originalmente asociado con CVE-2006-5815, lo cual fue erroneo debido a un vago descubrimiento inicial.\r\nNOTA: Los desarrolladores de ProFTPD impugnaron esta vulnerabilidad, diciendo que la ubicación de memoria es sobre-escrita por asignación antes de ser usada con la función afectada, así que no es una vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-16T22:32:36.697",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:proftpd_project:proftpd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "743C1E0F-3365-49C0-99A3-628586B77FCC",
              "versionEndIncluding": "1.3.0a"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}