FKIE_CVE-2020-25857

Vulnerability from fkie_nvd - Published: 2021-02-03 17:15 - Updated: 2024-11-21 05:18
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
The function ClientEAPOLKeyRecvd() 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 rtl_memcpy() operation, resulting in a stack buffer overflow 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's PSK.
References
vuln@vdoo.comhttps://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
realtek rtl8195a_firmware *
realtek rtl8195a -
To clipboard 

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      "nodes": [
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              "matchCriteriaId": "24D4DC02-E833-483C-885F-9E168E5F8A4C",
              "versionEndExcluding": "2.08",
              "vulnerable": true
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The function ClientEAPOLKeyRecvd() 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 rtl_memcpy() operation, resulting in a stack buffer overflow 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 ClientEAPOLKeyRecvd() 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 operaci\u00f3n rtl_memcpy(), resultando en un desbordamiento del b\u00fafer de la 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-2020-25857",
  "lastModified": "2024-11-21T05:18:54.987",
  "metrics": {
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        "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"
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        "exploitabilityScore": 10.0,
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        "obtainAllPrivilege": false,
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          "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",
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  "published": "2021-02-03T17:15:15.747",
  "references": [
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      "tags": [
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  "sourceIdentifier": "vuln@vdoo.com",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-121"
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      "source": "vuln@vdoo.com",
      "type": "Secondary"
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          "lang": "en",
          "value": "CWE-787"
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      "source": "nvd@nist.gov",
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}


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