FKIE_CVE-2020-3924

Vulnerability from fkie_nvd - Published: 2020-02-27 04:15 - Updated: 2026-06-17 03:19
Severity
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.
References
twcert@cert.org.twhttps://tvn.twcert.org.tw/taiwanvn/TVN-201910004Third Party Advisory
twcert@cert.org.twhttps://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcfThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://tvn.twcert.org.tw/taiwanvn/TVN-201910004Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcfThird Party Advisory
Impacted products
Vendor Product Version
tonnet tat-77104g1_firmware *
tonnet tat-77104g1 -
tonnet tat-70432n_firmware *
tonnet tat-70432n -
tonnet tat-71416g1_firmware *
tonnet tat-71416g1 -
tonnet tat-71832g1_firmware *
tonnet tat-71832g1 -
tonnet tat-76104g3_firmware *
tonnet tat-76104g3 -
tonnet tat-76108g3_firmware *
tonnet tat-76108g3 -
tonnet tat-76116g3_firmware *
tonnet tat-76116g3 -
tonnet tat-76132g3_firmware *
tonnet tat-76132g3 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
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            "TAT-76 series"
          ],
          "product": "DVR",
          "vendor": "TONNET",
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              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
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            "TAT-77 series"
          ],
          "product": "DVR",
          "vendor": "TONNET",
          "versions": [
            {
              "lessThanOrEqual": "20200213",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "twcert@cert.org.tw"
    }
  ],
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system."
    },
    {
      "lang": "es",
      "value": "El firmware DVR en las series de productos TAT-76 y TAT-77, proporcionados por TONNET, no verifica apropiadamente los archivos de parche. Los atacantes pueden inyectar un comando espec\u00edfico en un archivo de parche y conseguir acceso al sistema."
    }
  ],
  "id": "CVE-2020-3924",
  "lastModified": "2026-06-17T03:19:16.317",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 5.9,
        "source": "twcert@cert.org.tw",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-02-27T04:15:10.670",
  "references": [
    {
      "source": "twcert@cert.org.tw",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://tvn.twcert.org.tw/taiwanvn/TVN-201910004"
    },
    {
      "source": "twcert@cert.org.tw",
      "tags": [
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      ],
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    },
    {
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      "url": "https://tvn.twcert.org.tw/taiwanvn/TVN-201910004"
    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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  ],
  "sourceIdentifier": "twcert@cert.org.tw",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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