{
  "id": "CVE-2020-8516",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2020-02-02T13:15:10.903",
  "lastModified": "2024-05-17T01:51:05.390",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "The daemon in Tor through 0.4.1.8 and 0.4.2.x through 0.4.2.6 does not verify that a rendezvous node is known before attempting to connect to it, which might make it easier for remote attackers to discover circuit information. NOTE: The network team of Tor claims this is an intended behavior and not a vulnerability"
    },
    {
      "lang": "es",
      "value": "** EN DISPUTA ** El demonio en Tor hasta la versi\u00f3n 0.4.1.8 y versiones 0.4.2.x hasta la versi\u00f3n 0.4.2.6, no comprueba que un nodo rendezvous sea conocido antes de intentar conectarse a \u00e9l, lo que podr\u00eda facilitar a atacantes remotos descubrir informaci\u00f3n del circuito. NOTA: El equipo de red de Tor afirma que este es un comportamiento previsto y no una vulnerabilidad."
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*",
              "versionEndIncluding": "0.4.1.8",
              "matchCriteriaId": "A433651E-DAE8-44B3-AB2F-069776068357"
            },
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  ],
  "references": [
    {
      "url": "https://lists.torproject.org/pipermail/tor-dev/2020-February/014146.html",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://lists.torproject.org/pipermail/tor-dev/2020-February/014147.html",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://security-tracker.debian.org/tracker/CVE-2020-8516",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://trac.torproject.org/projects/tor/ticket/33129",
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.hackerfactor.com/blog/index.php?/archives/868-Deanonymizing-Tor-Circuits.html",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Mitigation",
        "Technical Description",
        "Third Party Advisory"
      ]
    }
  ]
}