{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Realtek RTL8195A Wi-Fi Module",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Versions before 2020-04-21 (up to and excluding 2.08)"
            }
          ]
        }
      ],
      "source": "vuln@vdoo.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:realtek:rtl8195a_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "24D4DC02-E833-483C-885F-9E168E5F8A4C",
              "versionEndExcluding": "2.08",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:realtek:rtl8195a:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "62A37D39-5134-4AFE-9F59-C8C36A113B04",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The function CheckMic() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for an internal function, _rt_md5_hmac_veneer() or _rt_hmac_sha1_veneer(), resulting in a stack buffer over-read which can be exploited for denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker does not need to know the network\u0027s PSK."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n CheckMic() en el m\u00f3dulo Wi-Fi Realtek RTL8195A anterior a versiones publicadas en Abril de 2020 (hasta y excluyendo la 2.08), no comprueba el par\u00e1metro size para una funci\u00f3n interna, _rt_md5_hmac_veneer() o _rt_hmac_sha1_veneer(), resulta en una lectura excesiva del b\u00fafer de pila que puede ser explotada para una denegaci\u00f3n de servicio.\u0026#xa0;Un atacante puede hacerse pasar por un Access Point y atacar a un cliente Wi-Fi vulnerable al inyectar un paquete dise\u00f1ado en el protocolo de enlace WPA2.\u0026#xa0;El atacante no necesita conocer el PSK de la red"
    }
  ],
  "id": "CVE-2020-25853",
  "lastModified": "2026-06-17T03:07:23.613",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-02-03T17:15:14.187",
  "references": [
    {
      "source": "vuln@vdoo.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/"
    }
  ],
  "sourceIdentifier": "vuln@vdoo.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-126"
        }
      ],
      "source": "vuln@vdoo.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}