« Volver al listado

CVE-2019-8261

Estado: ModificadaCrítica (9.8)—

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200.

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)

Uvnc — Ultravnc

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2019-8261",
  "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": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "vulnerability@kaspersky.com",
      "affectedData": [
        {
          "vendor": "UltraVNC",
          "product": "UltraVNC",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.2.3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2019-03-05T15:29:00.443",
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf",
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf",
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf",
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-007-ultravnc-out-of-bound-read/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11",
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://www.us-cert.gov/ics/advisories/icsa-20-161-06",
      "source": "vulnerability@kaspersky.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-286838.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-940818.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-007-ultravnc-out-of-bound-read/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-131-11",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.us-cert.gov/ics/advisories/icsa-20-161-06",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "vulnerability@kaspersky.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200."
    },
    {
      "lang": "es",
      "value": "UltraVNC, en su revisión 1199, contiene una vulnerabilidad de lectura fuera de límites en el código VNC dentro del decodificador del cliente CoRRE, provocado por el desbordamiento de multiplicaciones. Este ataque parece ser explotable mediante la conectividad de red. Esto se ha solucionado en la revisión 1200."
    }
  ],
  "lastModified": "2026-06-17T02:41:46.160",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "555D034F-3D64-4ED1-9B63-F8D59199E99C",
              "versionEndExcluding": "1.2.2.3"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "vulnerability@kaspersky.com"
}