CVE-2021-1440

{"id": "CVE-2021-1440", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "psirt@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.2}]}, "published": "2024-11-18T16:15:10.400", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-xss-webui-gQLSFyPM", "tags": ["Not Applicable"], "source": "psirt@cisco.com"}, {"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-sma-info-disclo-VOu2GHbZ", "tags": ["Not Applicable"], "source": "psirt@cisco.com"}, {"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-sigverbypass-gPYXd6Mk", "tags": ["Not Applicable"], "source": "psirt@cisco.com"}, {"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrbgp-rpki-dos-gvmjqxbk", "tags": ["Vendor Advisory"], "source": "psirt@cisco.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-617"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the implementation of the Resource Public Key Infrastructure (RPKI) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the Border Gateway Protocol (BGP) process to crash, resulting in a denial of service (DoS) condition.\r\nThis vulnerability is due to the incorrect handling of a specific RPKI to Router (RTR) Protocol packet header. An attacker could exploit this vulnerability by compromising the RPKI validator server and sending a specifically crafted RTR packet to an affected device. Alternatively, the attacker could use man-in-the-middle techniques to impersonate the RPKI validator server and send a specifically crafted RTR response packet over the established RTR TCP connection to the affected device. A successful exploit could allow the attacker to cause a DoS condition because the BGP process could constantly restart and BGP routing could become unstable.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is part of the September 2021 release of the Cisco IOS XR Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see ."}, {"lang": "es", "value": "Una vulnerabilidad en la implementaci\u00f3n de la caracter\u00edstica Resource Public Key Infrastructure (RPKI) del software Cisco IOS XR podr\u00eda permitir que un atacante remoto no autenticado provoque el bloqueo del proceso del protocolo de puerta de enlace fronteriza (BGP), lo que dar\u00eda lugar a una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad se debe al manejo incorrecto de un encabezado de paquete espec\u00edfico del protocolo RPKI a enrutador (RTR). Un atacante podr\u00eda aprovechar esta vulnerabilidad comprometiendo el servidor validador de RPKI y enviando un paquete RTR espec\u00edficamente manipulado a un dispositivo afectado. Como alternativa, el atacante podr\u00eda utilizar t\u00e9cnicas de intermediario para hacerse pasar por el servidor validador de RPKI y enviar un paquete de respuesta RTR espec\u00edficamente manipulado a trav\u00e9s de la conexi\u00f3n TCP RTR establecida al dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante provocar una condici\u00f3n de DoS porque el proceso BGP podr\u00eda reiniciarse constantemente y el enrutamiento BGP podr\u00eda volverse inestable. Cisco ha publicado actualizaciones de software que solucionan esta vulnerabilidad. No existen workarounds que aborden esta vulnerabilidad. Este aviso es parte de la publicaci\u00f3n de septiembre de 2021 del paquete de avisos de seguridad del software Cisco IOS XR. Para obtener una lista completa de los avisos y los enlaces a ellos, consulte ."}], "lastModified": "2025-08-01T18:28:33.740", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "70A83E5C-3091-450D-B60F-ECBCB88A3067", "versionEndExcluding": "7.3.1", "versionStartIncluding": "4.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "psirt@cisco.com"}