CVE-2021-1230 (GCVE-0-2021-1230)

Vulnerability from cvelistv5 – Published: 2021-02-24 19:30 – Updated: 2024-11-08 23:39
VLAI?
Summary
A vulnerability with the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a routing process to crash, which could lead to a denial of service (DoS) condition. This vulnerability is due to an issue with the installation of routes upon receipt of a BGP update. An attacker could exploit this vulnerability by sending a crafted BGP update to an affected device. A successful exploit could allow the attacker to cause the routing process to crash, which could cause the device to reload. This vulnerability applies to both Internal BGP (IBGP) and External BGP (EBGP). Note: The Cisco implementation of BGP accepts incoming BGP traffic from explicitly configured peers only. To exploit this vulnerability, an attacker would need to send a specific BGP update message over an established TCP connection that appears to come from a trusted BGP peer.
Severity ?
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CWE
Assigner
References
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
Impacted products
Vendor Product Version
Cisco Cisco NX-OS System Software in ACI Mode Affected: n/a
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"A vulnerability with the Border Gateway Protocol (BGP) for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a routing process to crash, which could lead to a denial of service (DoS) condition. This vulnerability is due to an issue with the installation of routes upon receipt of a BGP update. An attacker could exploit this vulnerability by sending a crafted BGP update to an affected device. A successful exploit could allow the attacker to cause the routing process to crash, which could cause the device to reload. This vulnerability applies to both Internal BGP (IBGP) and External BGP (EBGP). Note: The Cisco implementation of BGP accepts incoming BGP traffic from explicitly configured peers only. To exploit this vulnerability, an attacker would need to send a specific BGP update message over an established TCP connection that appears to come from a trusted BGP peer.\"}, {\"lang\": \"es\", \"value\": \"Una vulnerabilidad con el protocolo Border Gateway Protocol (BGP) para Cisco Nexus 9000 Series Fabric Switches en modo Application Centric Infrastructure (ACI) podr\\u00eda permitir a un atacante remoto no autenticado causar la ca\\u00edda de un proceso de enrutamiento, lo que podr\\u00eda conllevar a una condici\\u00f3n de denegaci\\u00f3n de servicio (DoS).\u0026#xa0;Esta vulnerabilidad es debido a un problema con la instalaci\\u00f3n de rutas tras recibir una actualizaci\\u00f3n de BGP.\u0026#xa0;Un atacante podr\\u00eda explotar esta vulnerabilidad mediante el env\\u00edo de una actualizaci\\u00f3n de BGP dise\\u00f1ada a un dispositivo afectado.\u0026#xa0;Una explotaci\\u00f3n con \\u00e9xito podr\\u00eda permitir al atacante causar que el proceso de enrutamiento se bloquee, lo que podr\\u00eda hacer que el dispositivo se recargue.\u0026#xa0;Esta vulnerabilidad se aplica tanto a Internal BGP (IBGP) como a External BGP (EBGP).\u0026#xa0;Nota: La implementaci\\u00f3n de Cisco de BGP acepta tr\\u00e1fico BGP entrante solo de peers configurados expl\\u00edcitamente.\u0026#xa0;Para explotar esta vulnerabilidad, un atacante necesitar\\u00eda enviar un mensaje de actualizaci\\u00f3n de BGP espec\\u00edfico mediante una conexi\\u00f3n TCP establecida que parece provenir de un peer de BGP confiable\"}]",
      "id": "CVE-2021-1230",
      "lastModified": "2024-11-21T05:43:53.000",
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      "published": "2021-02-24T20:15:12.817",
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      "cveMetadata": "{\"cveId\": \"CVE-2021-1230\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-08T23:39:28.825Z\", \"dateReserved\": \"2020-11-13T00:00:00\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2021-02-24T19:30:30.975897Z\", \"assignerShortName\": \"cisco\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.