« Back to list

CVE-2017-17027

Status: ModifiedCritical (9.8)—

A buffer overflow vulnerability in FTP service in QNAP QTS version 4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116 and earlier could allow remote attackers to execute arbitrary code on NAS devices.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Qnap — QTS

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2017-17027",
  "cveTags": [],
  "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": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@qnapsecurity.com.tw",
      "affectedData": [
        {
          "vendor": "QNAP",
          "product": "QTS FTP service",
          "versions": [
            {
              "status": "affected",
              "version": "4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116"
            }
          ]
        }
      ]
    }
  ],
  "published": "2017-12-21T15:29:00.427",
  "references": [
    {
      "url": "http://www.securitytracker.com/id/1040018",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "security@qnapsecurity.com.tw"
    },
    {
      "url": "https://www.qnap.com/zh-tw/security-advisory/nas-201712-15",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "security@qnapsecurity.com.tw"
    },
    {
      "url": "http://www.securitytracker.com/id/1040018",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.qnap.com/zh-tw/security-advisory/nas-201712-15",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A buffer overflow vulnerability in FTP service in QNAP QTS version 4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116 and earlier could allow remote attackers to execute arbitrary code on NAS devices."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de búfer en el servicio FTP de QNAP QTS, en sus versiones 4.2.6 build 20171026, 4.3.3.0378 build 20171117, 4.3.4.0387 (Beta 2) build 20171116 y anteriores podría permitir que atacantes remotos ejecuten código arbitrario en dispositivos NAS."
    }
  ],
  "lastModified": "2026-06-17T01:10:14.960",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "743F5071-0DE8-432A-9A85-81A4519A6DA1",
              "versionEndIncluding": "4.3.3.0378"
            },
            {
              "criteria": "cpe:2.3:o:qnap:qts:4.3.4.0358:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D560B30D-6A9F-4A44-B83B-4FAB02A94830"
            },
            {
              "criteria": "cpe:2.3:o:qnap:qts:4.3.4.0370:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "ACB33269-7F69-45DA-9CF0-B0322FFC577D"
            },
            {
              "criteria": "cpe:2.3:o:qnap:qts:4.3.4.0372:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3CABE783-B9CA-4E15-8DC2-75C39F214600"
            },
            {
              "criteria": "cpe:2.3:o:qnap:qts:4.3.4.0374:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D8B39FE2-79A9-478C-AE83-8D9664A6D1F8"
            },
            {
              "criteria": "cpe:2.3:o:qnap:qts:4.3.4.0387:beta2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DEA6AF09-BCB3-45EE-A59F-5A6CEFE8CBAC"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@qnapsecurity.com.tw"
}