CVE-2025-20234
Estado: AnalizadaAlta (7.5)—
A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software. For a description of this vulnerability, see the .
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.82%
- Percentil entre todas las CVEs puntuadas: 56
- Fecha de la puntuación: 6/10/2026
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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access90 % - Impacto principal
T1499.004Application or System Exploitationimpact85 %
Vulnerabilidad remota sin autenticación (AV:N, PR:N, UI:N) en procesamiento UDF de ClamAV; atacante remoto envía archivo malformado causando denegación de servicio por terminación del proceso de escaneo.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (3)
CWE
- CWE-125
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-20234",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-20234",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2025-06-18T18:20:31.170035Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.3,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "LOW",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 1.4,
"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 Secure Endpoint",
"versions": [
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "6.2.19"
},
{
"status": "affected",
"version": "7.3.3"
},
{
"status": "affected",
"version": "7.2.13"
},
{
"status": "affected",
"version": "6.1.5"
},
{
"status": "affected",
"version": "6.3.1"
},
{
"status": "affected",
"version": "6.2.5"
},
{
"status": "affected",
"version": "7.3.5"
},
{
"status": "affected",
"version": "6.2.1"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.1.1"
},
{
"status": "affected",
"version": "6.3.5"
},
{
"status": "affected",
"version": "6.2.9"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "6.1.7"
},
{
"status": "affected",
"version": "7.2.11"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.1.5"
},
{
"status": "affected",
"version": "6.3.3"
},
{
"status": "affected",
"version": "7.3.9"
},
{
"status": "affected",
"version": "6.2.3"
},
{
"status": "affected",
"version": "6.1.9"
},
{
"status": "affected",
"version": "6.0.9"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "6.0.7"
},
{
"status": "affected",
"version": "6.3.7"
},
{
"status": "affected",
"version": "1.12.3"
},
{
"status": "affected",
"version": "1.8.0"
},
{
"status": "affected",
"version": "1.11.1"
},
{
"status": "affected",
"version": "1.12.4"
},
{
"status": "affected",
"version": "1.10.0"
},
{
"status": "affected",
"version": "1.12.0"
},
{
"status": "affected",
"version": "1.8.1"
},
{
"status": "affected",
"version": "1.10.1"
},
{
"status": "affected",
"version": "1.12.1"
},
{
"status": "affected",
"version": "1.12.6"
},
{
"status": "affected",
"version": "1.14.0"
},
{
"status": "affected",
"version": "1.10.2"
},
{
"status": "affected",
"version": "1.12.7"
},
{
"status": "affected",
"version": "1.12.2"
},
{
"status": "affected",
"version": "1.6.0"
},
{
"status": "affected",
"version": "1.9.0"
},
{
"status": "affected",
"version": "1.11.0"
},
{
"status": "affected",
"version": "1.7.0"
},
{
"status": "affected",
"version": "1.13.0"
},
{
"status": "affected",
"version": "1.8.4"
},
{
"status": "affected",
"version": "1.13.1"
},
{
"status": "affected",
"version": "1.9.1"
},
{
"status": "affected",
"version": "1.12.5"
},
{
"status": "affected",
"version": "1.13.2"
},
{
"status": "affected",
"version": "8.1.7.21512"
},
{
"status": "affected",
"version": "8.1.7"
},
{
"status": "affected",
"version": "8.1.5"
},
{
"status": "affected",
"version": "8.1.3.21242"
},
{
"status": "affected",
"version": "8.1.3"
},
{
"status": "affected",
"version": "8.1.5.21322"
},
{
"status": "affected",
"version": "8.1.7.21417"
},
{
"status": "affected",
"version": "1.14.1"
},
{
"status": "affected",
"version": "1.15.2"
},
{
"status": "affected",
"version": "1.15.3"
},
{
"status": "affected",
"version": "1.15.4"
},
{
"status": "affected",
"version": "1.15.6"
},
{
"status": "affected",
"version": "1.16.0"
},
{
"status": "affected",
"version": "1.16.1"
},
{
"status": "affected",
"version": "1.16.2"
},
{
"status": "affected",
"version": "1.16.3"
},
{
"status": "affected",
"version": "1.18.1"
},
{
"status": "affected",
"version": "1.21.0"
},
{
"status": "affected",
"version": "1.21.2"
},
{
"status": "affected",
"version": "1.22.4"
},
{
"status": "affected",
"version": "1.24.1"
},
{
"status": "affected",
"version": "1.24.2"
},
{
"status": "affected",
"version": "1.24.4"
},
{
"status": "affected",
"version": "1.17.0"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2025-06-18T17:15:28.833",
"references": [
{
"url": "https://blog.clamav.net/2025/06/clamav-143-and-109-security-patch.html",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
},
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-udf-hmwd9nDy",
"tags": [
"Third Party Advisory"
],
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to a memory overread during UDF file scanning. An attacker could exploit this vulnerability by submitting a crafted file containing UDF content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process, resulting in a DoS condition on the affected software.\r\nFor a description of this vulnerability, see the ."
},
{
"lang": "es",
"value": "Una vulnerabilidad en el procesamiento de Universal Disk Format (UDF) de ClamAV podría permitir que un atacante remoto no autenticado provoque una denegación de servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe a una sobrelectura de memoria durante el análisis de archivos UDF. Un atacante podría explotar esta vulnerabilidad enviando un archivo manipulado con contenido UDF para que ClamAV lo analice en un dispositivo afectado. Una explotación exitosa podría permitir al atacante finalizar el proceso de análisis de ClamAV, lo que provocaría una denegación de servicio (DoS) en el software afectado. Para obtener una descripción de esta vulnerabilidad, consulte [enlace faltante]."
}
],
"lastModified": "2026-06-17T08:41:08.853",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "49480D41-EBD3-4541-8418-80DD6444C6DB",
"versionEndExcluding": "1.4.3",
"versionStartIncluding": "1.2.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:linux:*:*",
"vulnerable": true,
"matchCriteriaId": "4F19C9AF-A336-4DF7-AB2A-778228F79A20",
"versionEndExcluding": "1.26.1"
},
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:macos:*:*",
"vulnerable": true,
"matchCriteriaId": "DFA01B75-3D43-4B20-B5A7-354854025F96",
"versionEndExcluding": "1.26.1"
},
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*",
"vulnerable": true,
"matchCriteriaId": "72687E9E-1CC5-44A2-B207-1E459FFECB56",
"versionEndExcluding": "7.5.21"
},
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint:*:*:*:*:*:windows:*:*",
"vulnerable": true,
"matchCriteriaId": "5389A975-75C0-47F7-9DE4-25FD91226785",
"versionEndExcluding": "8.4.5",
"versionStartIncluding": "8.0.1.21160"
},
{
"criteria": "cpe:2.3:a:cisco:secure_endpoint_private_cloud:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A7D78AF2-E32D-4346-A7A8-6137B623F1B8",
"versionEndExcluding": "4.2.2"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "psirt@cisco.com"
}