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CVE-2002-1336

Estado: ModificadaAlta (7.5)—

TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Tightvnc — Tightvnc

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2002-1336",
  "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": true,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2002-12-11T05:00:00.000",
  "references": [
    {
      "url": "http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=102753170201524&w=2",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=102769183913594&w=2",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2002-287.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2003-041.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/5296",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.tightvnc.com/WhatsNew.txt",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/5992",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=102753170201524&w=2",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://marc.info/?l=bugtraq&m=102769183913594&w=2",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2002-287.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.redhat.com/support/errata/RHSA-2003-041.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/5296",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.tightvnc.com/WhatsNew.txt",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/5992",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users."
    },
    {
      "lang": "es",
      "value": "TightVNC anterior a 1.2.6 genera la misma cadena de desafío a múltiples conexiones, lo que permite a atacantes remotos evitar la autenticación VNC espiando el desafio y la respuesta de otros usuarios."
    }
  ],
  "lastModified": "2026-06-16T21:59:07.640",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:tightvnc:tightvnc:1.2.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B2F4EE57-DA68-4438-A401-BAC82B7242D2"
            },
            {
              "criteria": "cpe:2.3:a:tightvnc:tightvnc:1.2.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F9E11A57-016E-4720-A266-A53743629CD8"
            },
            {
              "criteria": "cpe:2.3:a:tightvnc:tightvnc:1.2.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AF990CCF-70BE-46F6-9360-ECC39B6D6F3B"
            },
            {
              "criteria": "cpe:2.3:a:tightvnc:tightvnc:1.2.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0274E35A-ACAB-43F5-A4F3-383CA9EEA1CC"
            },
            {
              "criteria": "cpe:2.3:a:tightvnc:tightvnc:1.2.5:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0FD5B03E-D897-4A06-A3EF-62B13B46B7EF"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}