FKIE_CVE-2017-9478

Vulnerability from fkie_nvd - Published: 2017-07-31 03:29 - Updated: 2026-06-17 01:28
Severity
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST) and DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices sets the CM MAC address to a value with a two-byte offset from the MTA/VoIP MAC address, which indirectly allows remote attackers to discover hidden Home Security Wi-Fi networks by leveraging the embedding of the MTA/VoIP MAC address into the DNS hostname.
References
cve@mitre.orghttps://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-20.emta-reverse-dns.txtExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/BastilleResearch/CableTap/blob/master/doc/advisories/bastille-20.emta-reverse-dns.txtExploit, Third Party Advisory
Impacted products
Vendor Product Version
cisco dpc3939_firmware dpc3939-p20-18-v303r20421746-170221a-cmcst
cisco dpc3939 -
cisco dpc3939_firmware dpc3939-p20-18-v303r20421733-160420a-cmcst
cisco dpc3939 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
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              "matchCriteriaId": "C881B07A-9652-465E-A804-1B5ED959E1C4",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Comcast firmware on Cisco DPC3939 (firmware version dpc3939-P20-18-v303r20421733-160420a-CMCST) and DPC3939 (firmware version dpc3939-P20-18-v303r20421746-170221a-CMCST) devices sets the CM MAC address to a value with a two-byte offset from the MTA/VoIP MAC address, which indirectly allows remote attackers to discover hidden Home Security Wi-Fi networks by leveraging the embedding of the MTA/VoIP MAC address into the DNS hostname."
    },
    {
      "lang": "es",
      "value": "El firmware de Comcast en Cisco DPC3939 (versi\u00f3n de firmware dpc3939-P20-18-v303r20421733-160420a-CMCST) y DPC3939 (DPC3939 (DPC3939 ( versi\u00f3n de firmware dpc3939-P20-18-v303r20421746-170221a-CMCST), establece la direcci\u00f3n MAC CM en un valor con un offset de dos bytes de la Direcci\u00f3n MAC MTA/VoIP, que indirectamente permite a los atacantes remotos detectar redes Wi-Fi ocultas de Home Security mediante el aprovechamiento de la inserci\u00f3n de la direcci\u00f3n MAC MTA/VoIP en el nombre de host DNS."
    }
  ],
  "id": "CVE-2017-9478",
  "lastModified": "2026-06-17T01:28:12.070",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
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        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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    "cvssMetricV30": [
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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  "published": "2017-07-31T03:29:00.300",
  "references": [
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      "tags": [
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        "Third Party Advisory"
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  "vulnStatus": "Modified",
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          "value": "CWE-200"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.