« Volver al listado

CVE-2020-3926

Estado: ModificadaAlta (7.5)—

An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter.

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)

Changingtec — Servisign

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-3926",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "twcert@cert.org.tw",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 1.6
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "twcert@cert.org.tw",
      "affectedData": [
        {
          "vendor": "CHANGING",
          "product": "ServiSign Windows versions",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "1.0.19.0617"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-02-03T11:15:12.633",
  "references": [
    {
      "url": "https://tvn.twcert.org.tw/taiwanvn/TVN-201910006",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "twcert@cert.org.tw"
    },
    {
      "url": "https://www.chtsecurity.com/news/1179d48b-7609-4f67-9d7e-3bac2979c6ce",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "twcert@cert.org.tw"
    },
    {
      "url": "https://tvn.twcert.org.tw/taiwanvn/TVN-201910006",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.chtsecurity.com/news/1179d48b-7609-4f67-9d7e-3bac2979c6ce",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An arbitrary-file-access vulnerability exists in ServiSign security plugin, as long as the attackers learn the specific API function, they may access arbitrary files on target system via crafted API parameter."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de acceso a archivos arbitrarios en el plugin de seguridad de ServiSign, siempre que los atacantes aprendan la función de la API específica, pueden acceder a archivos arbitrarios en el sistema de destino por medio de parámetros de la API diseñados."
    }
  ],
  "lastModified": "2026-06-17T03:19:16.547",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:changingtec:servisign:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8806BFD5-AF23-418C-978B-206504623B44",
              "versionEndIncluding": "1.0.19.0617"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "twcert@cert.org.tw"
}