GSD-2020-26299

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
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).
Aliases
Aliases
CVE-2020-26299
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{
  "GSD": {
    "alias": "CVE-2020-26299",
    "description": "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).",
    "id": "GSD-2020-26299"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-26299"
      ],
      "details": "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).",
      "id": "GSD-2020-26299",
      "modified": "2023-12-13T01:22:09.026571Z",
      "schema_version": "1.4.0"
    }
  },
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        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-26299",
        "STATE": "PUBLIC",
        "TITLE": "File System Bounds Escape"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
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              "product": {
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                    "product_name": "ftp-srv",
                    "version": {
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                          "version_value": "\u003c 4.4.0"
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            "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)."
          }
        ]
      },
      "impact": {
        "cvss": {
          "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"
        }
      },
      "problemtype": {
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          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.npmjs.com/package/ftp-srv",
            "refsource": "MISC",
            "url": "https://www.npmjs.com/package/ftp-srv"
          },
          {
            "name": "https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9",
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            "url": "https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9"
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          },
          {
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          {
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          }
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      },
      "source": {
        "advisory": "GHSA-pmw4-jgxx-pcq9",
        "discovery": "UNKNOWN"
      }
    },
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      "advisories": [
        {
          "affected_range": "\u003c4.4.0",
          "affected_versions": "All versions before 4.4.0",
          "cvss_v2": "AV:N/AC:L/Au:S/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-22",
            "CWE-937"
          ],
          "date": "2021-02-19",
          "description": "ftp-srv is an open-source FTP server designed to be simple yet configurable. In ftp-srv 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 (commit b859450a37cba10ff3c431eb4aa67771122e3).",
          "fixed_versions": [
            "4.4.0"
          ],
          "identifier": "CVE-2020-26299",
          "identifiers": [
            "CVE-2020-26299",
            "GHSA-pmw4-jgxx-pcq9"
          ],
          "not_impacted": "All versions starting from 4.4.0",
          "package_slug": "npm/ftp-srv",
          "pubdate": "2021-02-10",
          "solution": "Upgrade to version 4.4.0 or above.",
          "title": "Path Traversal",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-26299"
          ],
          "uuid": "29531cd7-eb38-4d46-bbb1-0c8c9166013c"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:ftp-srv_project:ftp-srv:*:*:*:*:*:node.js:*:*",
                "cpe_name": [],
                "versionEndExcluding": "4.4.0",
                "vulnerable": true
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            ],
            "operator": "OR"
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            }
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "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,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2021-02-19T17:27Z",
      "publishedDate": "2021-02-10T18:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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