FKIE_CVE-2018-19945

Vulnerability from fkie_nvd - Published: 2020-12-31 17:15 - Updated: 2026-06-17 01:50
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Summary
A vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6. Caused by improper limitations of a pathname to a restricted directory, this vulnerability allows for renaming arbitrary files on the target system, if exploited. QNAP have already fixed this vulnerability in the following versions: QTS 4.3.6.0895 build 20190328 (and later) QTS 4.3.4.0899 build 20190322 (and later) This issue does not affect QTS 4.4.x or QTS 4.5.x.
References
security@qnapsecurity.com.twhttps://www.qnap.com/zh-tw/security-advisory/qsa-20-21Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.qnap.com/zh-tw/security-advisory/qsa-20-21Vendor Advisory
Impacted products
Vendor Product Version
qnap qts *
qnap qts *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "platforms": [
            "build 20190328"
          ],
          "product": "QTS",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "lessThan": "4.3.6.0895",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "build 20190322"
          ],
          "product": "QTS",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "lessThan": "4.3.4.0899",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        },
        {
          "product": "QTS",
          "vendor": "QNAP Systems Inc.",
          "versions": [
            {
              "status": "unaffected",
              "version": "4.5.x"
            },
            {
              "status": "unaffected",
              "version": "4.4.x"
            }
          ]
        }
      ],
      "source": "security@qnapsecurity.com.tw"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E35BB2A-1E3B-4D5C-B6E0-357D430D0C68",
              "versionEndExcluding": "4.3.4.0899",
              "versionStartIncluding": "4.3.4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4D099A53-6729-43B2-B762-873BCDC0C354",
              "versionEndExcluding": "4.3.6.0895",
              "versionStartIncluding": "4.3.5",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been reported to affect earlier QNAP devices running QTS 4.3.4 to 4.3.6. Caused by improper limitations of a pathname to a restricted directory, this vulnerability allows for renaming arbitrary files on the target system, if exploited. QNAP have already fixed this vulnerability in the following versions: QTS 4.3.6.0895 build 20190328 (and later) QTS 4.3.4.0899 build 20190322 (and later) This issue does not affect QTS 4.4.x or QTS 4.5.x."
    },
    {
      "lang": "es",
      "value": "Se ha reportado de una vulnerabilidad que afecta a los dispositivos QNAP anteriores que ejecutan QTS versi\u00f3n 4.3.4 a la 4.3.6.\u0026#xa0;Causada por limitaciones inapropiadas de un nombre de ruta en un directorio restringido, esta vulnerabilidad permite cambiar el nombre de archivos arbitrarios en el sistema de destino, si se explota.\u0026#xa0;QNAP ya ha corregido esta vulnerabilidad en las siguientes versiones: QTS versi\u00f3n 4.3.6.0895 build 20190328 (y posterior) QTS versi\u00f3n 4.3.4.0899 build 20190322 (y posterior) Este problema no afecta a QTS versi\u00f3n 4.4.x o QTS versi\u00f3n 4.5.x."
    }
  ],
  "id": "CVE-2018-19945",
  "lastModified": "2026-06-17T01:50:09.690",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 8.5,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 7.8,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-12-31T17:15:12.510",
  "references": [
    {
      "source": "security@qnapsecurity.com.tw",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.qnap.com/zh-tw/security-advisory/qsa-20-21"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.qnap.com/zh-tw/security-advisory/qsa-20-21"
    }
  ],
  "sourceIdentifier": "security@qnapsecurity.com.tw",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        },
        {
          "lang": "en",
          "value": "CWE-22"
        },
        {
          "lang": "en",
          "value": "CWE-73"
        },
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "security@qnapsecurity.com.tw",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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