fkie_cve-2025-20115
Vulnerability from fkie_nvd
Published
2025-03-12 16:15
Modified
2025-08-01 16:13
Severity ?
Summary
A vulnerability in confederation implementation for the Border Gateway Protocol (BGP) in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
This vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more.
References
Impacted products
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ios_xr:24.2.11:*:*:*:*:*:*:*",
"matchCriteriaId": "11288A28-F0CF-4FEC-A0B7-3D93866F01FE",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:ios_xr:24.2.20:*:*:*:*:*:*:*",
"matchCriteriaId": "35D1FF2C-A40C-44EB-AAB1-A70B94E3D717",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in confederation implementation for the Border Gateway Protocol (BGP)\u0026nbsp;in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more."
},
{
"lang": "es",
"value": "Una vulnerabilidad en la implementaci\u00f3n de la confederaci\u00f3n del Protocolo de Puerta de Enlace Fronteriza (BGP) en el software Cisco IOS XR podr\u00eda permitir que un atacante remoto no autenticado provoque una denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad se debe a una corrupci\u00f3n de memoria que ocurre al crear una actualizaci\u00f3n de BGP con un atributo AS_CONFED_SEQUENCE que contiene 255 n\u00fameros de sistema aut\u00f3nomo (AS). Un atacante podr\u00eda explotar esta vulnerabilidad enviando un mensaje de actualizaci\u00f3n de BGP manipulado, o la red podr\u00eda estar dise\u00f1ada para que el atributo AS_CONFED_SEQUENCE alcance 255 n\u00fameros de AS o m\u00e1s. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante causar corrupci\u00f3n de memoria, lo que podr\u00eda provocar el reinicio del proceso BGP y provocar una denegaci\u00f3n de servicio (DoS). Para explotar esta vulnerabilidad, un atacante debe controlar un interlocutor de la confederaci\u00f3n BGP dentro del mismo sistema aut\u00f3nomo que la v\u00edctima, o la red debe estar dise\u00f1ada para que el atributo AS_CONFED_SEQUENCE alcance 255 n\u00fameros de AS o m\u00e1s."
}
],
"id": "CVE-2025-20115",
"lastModified": "2025-08-01T16:13:48.990",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 4.0,
"source": "psirt@cisco.com",
"type": "Primary"
}
]
},
"published": "2025-03-12T16:15:21.090",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Third Party Advisory"
],
"url": "https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/"
},
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-120"
}
],
"source": "psirt@cisco.com",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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