FKIE_CVE-2018-3759

Vulnerability from fkie_nvd - Published: 2018-06-13 15:29 - Updated: 2026-06-17 01:57
Severity
3.7 (Low) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
private_address_check ruby gem before 0.5.0 is vulnerable to a time-of-check time-of-use (TOCTOU) race condition due to the address the socket uses not being checked. DNS entries with a TTL of 0 can trigger this case where the initial resolution is a public address but the subsequent resolution is a private address.
References
support@hackerone.comhttps://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147Patch, Third Party Advisory
Impacted products
Vendor Product Version
private_address_check_project private_address_check *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "private_address_check ruby gem",
          "vendor": "HackerOne",
          "versions": [
            {
              "status": "affected",
              "version": "0.5.0"
            }
          ]
        }
      ],
      "source": "support@hackerone.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:private_address_check_project:private_address_check:*:*:*:*:*:ruby:*:*",
              "matchCriteriaId": "6FCBC921-366D-465C-9171-A5F2101A6078",
              "versionEndExcluding": "0.5.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "private_address_check ruby gem before 0.5.0 is vulnerable to a time-of-check time-of-use (TOCTOU) race condition due to the address the socket uses not being checked. DNS entries with a TTL of 0 can trigger this case where the initial resolution is a public address but the subsequent resolution is a private address."
    },
    {
      "lang": "es",
      "value": "La gema de Ruby private_address_check en versiones anteriores a la 0.5.0 es vulnerable a una condici\u00f3n de carrera TOCTOU (time-of-check time-of-use) debido a que no se comprueba la direcci\u00f3n empleada por el socket. Las entradas DNS con un TLL de 0 pueden desencadenar este caso donde la resoluci\u00f3n inicial es una direcci\u00f3n p\u00fablica, pero la siguiente es una direcci\u00f3n privada."
    }
  ],
  "id": "CVE-2018-3759",
  "lastModified": "2026-06-17T01:57:46.987",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.0"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-06-13T15:29:00.267",
  "references": [
    {
      "source": "support@hackerone.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/jtdowney/private_address_check/commit/4068228187db87fea7577f7020099399772bb147"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "support@hackerone.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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