CVE-2025-20343

{"id": "CVE-2025-20343", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-20343", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-11-05T20:06:45.616639Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "psirt@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}, {"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}]}, "affected": [{"source": "psirt@cisco.com", "affectedData": [{"vendor": "Cisco", "product": "Cisco Identity Services Engine Software", "versions": [{"status": "affected", "version": "3.4.0"}, {"status": "affected", "version": "3.4 Patch 1"}, {"status": "affected", "version": "3.4 Patch 2"}, {"status": "affected", "version": "3.4 Patch 3"}], "defaultStatus": "unknown"}]}], "published": "2025-11-05T17:15:37.443", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-radsupress-dos-8YF3JThh", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-697"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the RADIUS setting Reject RADIUS requests from clients with repeated failures on Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause Cisco ISE to restart unexpectedly.\r\n\r\nThis vulnerability is due to a logic error when processing a RADIUS access request for a MAC address that is already a rejected endpoint. An attacker could exploit this vulnerability by sending a specific sequence of multiple crafted RADIUS access request messages to Cisco ISE. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when Cisco ISE restarts."}, {"lang": "es", "value": "Una vulnerabilidad en la configuraci\u00f3n RADIUS \u201cRechazar solicitudes RADIUS de clientes con fallos repetidos\u201d en Cisco Identity Services Engine (ISE) podr\u00eda permitir a un atacante remoto no autenticado causar que Cisco ISE se reinicie inesperadamente.\n\nEsta vulnerabilidad se debe a un error de l\u00f3gica al procesar una solicitud de acceso RADIUS para una direcci\u00f3n MAC que ya es un endpoint rechazado. Un atacante podr\u00eda explotar esta vulnerabilidad al enviar una secuencia espec\u00edfica de m\u00faltiples mensajes de solicitud de acceso RADIUS manipulados a Cisco ISE. Un exploit exitoso podr\u00eda permitir al atacante causar una condici\u00f3n de denegaci\u00f3n de servicio (DoS) cuando Cisco ISE se reinicia."}], "lastModified": "2026-10-18T21:10:00.120", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D23905E0-E525-49B1-8E5F-4EB42D186768"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "74509498-38EF-4345-9583-CEF5C26CA1D8"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CD05FF93-7B8C-4283-9DB7-E03FE98FAADF"}, {"criteria": "cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0F9B6A8E-E773-44A3-9266-878F0C58EB41"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}