fkie_cve-2025-20115
Vulnerability from fkie_nvd
Published
2025-03-12 16:15
Modified
2025-03-12 16:15
Severity ?
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
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
psirt@cisco.comhttps://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX
Impacted products
Vendor Product Version


To clipboard 

{
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "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.\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 implementación de la confederación del Protocolo de Puerta de Enlace Fronteriza (BGP) en el software Cisco IOS XR podría permitir que un atacante remoto no autenticado provoque una denegación de servicio (DoS). Esta vulnerabilidad se debe a una corrupción de memoria que ocurre al crear una actualización de BGP con un atributo AS_CONFED_SEQUENCE que contiene 255 números de sistema autónomo (AS). Un atacante podría explotar esta vulnerabilidad enviando un mensaje de actualización de BGP manipulado, o la red podría estar diseñada para que el atributo AS_CONFED_SEQUENCE alcance 255 números de AS o más. Una explotación exitosa podría permitir al atacante causar corrupción de memoria, lo que podría provocar el reinicio del proceso BGP y provocar una denegación de servicio (DoS). Para explotar esta vulnerabilidad, un atacante debe controlar un interlocutor de la confederación BGP dentro del mismo sistema autónomo que la víctima, o la red debe estar diseñada para que el atributo AS_CONFED_SEQUENCE alcance 255 números de AS o más.",
      },
   ],
   id: "CVE-2025-20115",
   lastModified: "2025-03-12T16:15:21.090",
   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,
            source: "psirt@cisco.com",
            type: "Primary",
         },
      ],
   },
   published: "2025-03-12T16:15:21.090",
   references: [
      {
         source: "psirt@cisco.com",
         url: "https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/",
      },
      {
         source: "psirt@cisco.com",
         url: "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhX",
      },
   ],
   sourceIdentifier: "psirt@cisco.com",
   vulnStatus: "Awaiting Analysis",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-120",
            },
         ],
         source: "psirt@cisco.com",
         type: "Primary",
      },
   ],
}


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