CVE-2018-0257
A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect handling of certain DHCP packets. An attacker could exploit this vulnerability by sending certain DHCP packets to a specific segment of an affected device. A successful exploit could allow the attacker to increase CPU usage on the affected device and cause a DoS condition. Cisco Bug IDs: CSCvg73687.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Puntuación base: 4.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.77%
- Percentil entre todas las CVEs puntuadas: 54
- Fecha de la puntuación: 7/10/2026
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).
Tecnologías afectadas (1)
CWE
- CWE-399
- NVD-CWE-noinfo
Referencias
- http://www.securityfocus.com/bid/103948
- http://www.securitytracker.com/id/1040716
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8
- http://www.securityfocus.com/bid/103948
- http://www.securitytracker.com/id/1040716
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8
JSON original (NVD)
Mostrar
{
"id": "CVE-2018-0257",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2018-0257",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-11-29T14:38:27.635278Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 3.3,
"accessVector": "ADJACENT_NETWORK",
"vectorString": "AV:A/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": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 6.5,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 4.3,
"attackVector": "ADJACENT_NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:A/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": 2.8
}
]
},
"affected": [
{
"source": "psirt@cisco.com",
"affectedData": [
{
"vendor": "n/a",
"product": "Cisco cBR Series Converged Broadband Routers",
"versions": [
{
"status": "affected",
"version": "Cisco cBR Series Converged Broadband Routers"
}
]
}
]
}
],
"published": "2018-04-19T20:29:01.317",
"references": [
{
"url": "http://www.securityfocus.com/bid/103948",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "psirt@cisco.com"
},
{
"url": "http://www.securitytracker.com/id/1040716",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "psirt@cisco.com"
},
{
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
},
{
"url": "http://www.securityfocus.com/bid/103948",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securitytracker.com/id/1040716",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-399"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect handling of certain DHCP packets. An attacker could exploit this vulnerability by sending certain DHCP packets to a specific segment of an affected device. A successful exploit could allow the attacker to increase CPU usage on the affected device and cause a DoS condition. Cisco Bug IDs: CSCvg73687."
},
{
"lang": "es",
"value": "Una vulnerabilidad en Cisco IOS XE Software de Cisco cBR Series Converged Broadband Routers podría permitir que un atacante adyacente sin autenticar provoque un uso alto de CPU en un dispositivo afectado, lo que resulta en una condición de denegación de servicio (DoS). Esta vulnerabilidad se debe a la gestión incorrecta de ciertos paquetes DHCP. Un atacante podría explotar esta vulnerabilidad enviando ciertos paquetes DHCP a un segmento en concreto de un dispositivo afectado. Su explotación exitosa podría permitir que el atacante aumente el uso de CPU en el dispositivo afectado y provoque una denegación de servicio (DoS). Cisco Bug IDs: CSCvg73687."
}
],
"lastModified": "2026-06-17T01:30:20.270",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "270AC95F-0C63-4160-A5C3-F41B4A970156",
"versionEndIncluding": "3.18.4",
"versionStartIncluding": "3.18"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "36E9454B-01DD-425D-B001-7A4913326CA6",
"versionEndIncluding": "16.6.3",
"versionStartIncluding": "16.6"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0CDDE475-0066-4A44-9DB2-A2B07A64F3C2",
"versionEndIncluding": "16.7.2",
"versionStartExcluding": "16.7"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xe:15.6\\(2\\)sp:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "65B22948-0DA9-4E13-8C00-2FD738247DD3"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xe:16.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4CD8EAF9-6AB1-48B3-A690-6A5BD715FBD9"
},
{
"criteria": "cpe:2.3:o:cisco:ios_xe:16.5:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6B25F62B-E32C-47F7-AFF0-586D5FFA5C96"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "psirt@cisco.com"
}