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CVE-2018-8238

Estado: ModificadaAlta (7.8)—

A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka "Skype for Business and Lync Security Feature Bypass Vulnerability." This affects Skype, Microsoft Lync.

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 (2)

Microsoft — LyncMicrosoft — Skype FOR Business

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2018-8238",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 9.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Skype",
          "versions": [
            {
              "status": "affected",
              "version": "Business 2016 (32-bit)"
            },
            {
              "status": "affected",
              "version": "Business 2016 (64-bit)"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Lync",
          "versions": [
            {
              "status": "affected",
              "version": "2013 Service Pack 1 (32-bit)"
            },
            {
              "status": "affected",
              "version": "2013 Service Pack 1 (64-bit)"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-07-11T00:29:00.647",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/104619",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8238",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/104619",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8238",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka \"Skype for Business and Lync Security Feature Bypass Vulnerability.\" This affects Skype, Microsoft Lync."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de omisión de la característica de seguridad cuando Skype for Business o Lync no analizan correctamente los enlaces de ruta UNC compartidos mediante mensajes. Esto también se conoce como \"Skype for Business and Lync Security Feature Bypass Vulnerability\". Esto afecta a Skype y Microsoft Lync."
    }
  ],
  "lastModified": "2026-06-17T02:04:29.330",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:lync:2013:sp1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8B854E18-7CB0-43F7-9EBF-E356FA176B2F"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:skype_for_business:2016:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D499807D-91F3-447D-B9F0-D612898C9339"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}