CVE-2020-25857

{"id": "CVE-2020-25857", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"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:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2021-02-03T17:15:15.747", "references": [{"url": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/", "tags": ["Exploit", "Third Party Advisory"], "source": "vuln@vdoo.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}, {"type": "Secondary", "source": "vuln@vdoo.com", "description": [{"lang": "en", "value": "CWE-121"}]}], "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's 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. 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. El atacante no necesita conocer el PSK de la red"}], "lastModified": "2021-02-08T19:19:26.510", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:realtek:rtl8195a_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24D4DC02-E833-483C-885F-9E168E5F8A4C", "versionEndExcluding": "2.08"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:realtek:rtl8195a:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "62A37D39-5134-4AFE-9F59-C8C36A113B04"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "vuln@vdoo.com"}