FKIE_CVE-2020-26299

Vulnerability from fkie_nvd - Published: 2021-02-10 18:15 - Updated: 2026-06-17 03:08
Severity
6.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N
9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Summary
ftp-srv is an open-source FTP server designed to be simple yet configurable. In ftp-srv before version 4.4.0 there is a path-traversal vulnerability. Clients of FTP servers utilizing ftp-srv hosted on Windows machines can escape the FTP user's defined root folder using the expected FTP commands, for example, CWD and UPDR. When windows separators exist within the path (`\`), `path.resolve` leaves the upper pointers intact and allows the user to move beyond the root folder defined for that user. We did not take that into account when creating the path resolve function. The issue is patched in version 4.4.0 (commit 457b859450a37cba10ff3c431eb4aa67771122e3).
References
security-advisories@github.comhttps://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/autovance/ftp-srv/issues/167Exploit, Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/autovance/ftp-srv/issues/225Exploit, Third Party Advisory
security-advisories@github.comhttps://github.com/autovance/ftp-srv/pull/224Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9Exploit, Third Party Advisory
security-advisories@github.comhttps://www.npmjs.com/package/ftp-srvProduct, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/autovance/ftp-srv/issues/167Exploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/autovance/ftp-srv/issues/225Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/autovance/ftp-srv/pull/224Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.npmjs.com/package/ftp-srvProduct, Third Party Advisory
Impacted products
Vendor Product Version
ftp-srv_project ftp-srv *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "ftp-srv",
          "vendor": "autovance",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.4.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ftp-srv_project:ftp-srv:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "AA72E811-17FD-45E1-AA69-CC4D4C677F45",
              "versionEndExcluding": "4.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ftp-srv is an open-source FTP server designed to be simple yet configurable. In ftp-srv before version 4.4.0 there is a path-traversal vulnerability. Clients of FTP servers utilizing ftp-srv hosted on Windows machines can escape the FTP user\u0027s defined root folder using the expected FTP commands, for example, CWD and UPDR. When windows separators exist within the path (`\\`), `path.resolve` leaves the upper pointers intact and allows the user to move beyond the root folder defined for that user. We did not take that into account when creating the path resolve function. The issue is patched in version 4.4.0 (commit 457b859450a37cba10ff3c431eb4aa67771122e3)."
    },
    {
      "lang": "es",
      "value": "ftp-srv es un servidor FTP de c\u00f3digo abierto dise\u00f1ado para ser simple pero configurable.\u0026#xa0;En ftp-srv versiones anteriores a 4.4.0, se presenta una vulnerabilidad de salto de ruta.\u0026#xa0;Los clientes de servidores FTP que utilizan ftp-srv alojado en m\u00e1quinas Windows pueden escapar de la carpeta root definida por el usuario FTP utilizando los comandos FTP previstos, por ejemplo, CWD y UPDR.\u0026#xa0;Cuando contienen separadores de ventanas dentro de la ruta (\"\\\"), \"path.resolve\" deja intactos los punteros superiores y permite al usuario moverse m\u00e1s all\u00e1 de la carpeta root definida para ese usuario.\u0026#xa0;No lo tomamos en cuenta al crear la funci\u00f3n de resoluci\u00f3n de ruta.\u0026#xa0;El problema est\u00e1 parcheado en la versi\u00f3n 4.4.0 (commit 457b859450a37cba10ff3c431eb4aa67771122e3)"
    }
  ],
  "id": "CVE-2020-26299",
  "lastModified": "2026-06-17T03:08:01.727",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 4.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-02-10T18:15:12.703",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/issues/167"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/issues/225"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/pull/224"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://www.npmjs.com/package/ftp-srv"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/issues/167"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/issues/225"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/pull/224"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Third Party Advisory"
      ],
      "url": "https://www.npmjs.com/package/ftp-srv"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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