FKIE_CVE-2025-20141

Vulnerability from fkie_nvd - Published: 2025-03-12 16:15 - Updated: 2025-08-06 17:05
Severity ?
7.4 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Summary
A vulnerability in the handling of specific packets that are punted from a line card to a route processor in Cisco IOS XR Software Release 7.9.2 could allow an unauthenticated, adjacent attacker to cause control plane traffic to stop working on multiple Cisco IOS XR platforms.  This vulnerability is due to incorrect handling of packets that are punted to the route processor. An attacker could exploit this vulnerability by sending traffic, which must be handled by the Linux stack on the route processor, to an affected device. A successful exploit could allow the attacker to cause control plane traffic to stop working, resulting in a denial of service (DoS) condition.
References
psirt@cisco.comhttps://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/Product
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr792-bWfVDPYVendor Advisory
Impacted products
Vendor Product Version
cisco ios_xr 7.9.2
cisco ncs_540-12z20g-sys-a -
cisco ncs_540-12z20g-sys-d -
cisco ncs_540-24q2c2dd-sys -
cisco ncs_540-24q8l2dd-sys -
cisco ncs_540-24z8q2c-sys -
cisco ncs_540-28z4c-sys-a -
cisco ncs_540-28z4c-sys-d -
cisco ncs_540-6z14s-sys-d -
cisco ncs_540-6z18g-sys-a -
cisco ncs_540-6z18g-sys-d -
cisco ncs_540-acc-sys -
cisco ncs_540-fh-agg -
cisco ncs_540-fh-csr-sys -
cisco ncs_540x-12z16g-sys-a -
cisco ncs_540x-12z16g-sys-d -
cisco ncs_540x-16z4g8q2c-a -
cisco ncs_540x-16z4g8q2c-d -
cisco ncs_540x-16z8q2c-d -
cisco ncs_540x-4z14g2q-a -
cisco ncs_540x-4z14g2q-d -
cisco ncs_540x-6z18g-sys-a -
cisco ncs_540x-6z18g-sys-d -
cisco ncs_540x-8z16g-sys-a -
cisco ncs_540x-8z16g-sys-d -
cisco ncs_540x-acc-sys -
cisco ncs_5501 -
cisco ncs_5501-se -
cisco ncs_5502 -
cisco ncs_5502-se -
cisco ncs_5504 -
cisco ncs_5508 -
cisco ncs_5516 -
cisco ncs_55a1-24h -
cisco ncs_55a1-24q6h-s -
cisco ncs_55a1-24q6h-ss -
cisco ncs_55a1-36h -
cisco ncs_55a1-36h-se -
cisco ncs_55a1-48q6h -
cisco ncs_55a2-mod-hd-s -
cisco ncs_55a2-mod-s -
cisco ncs_55a2-mod-se-s -
cisco ncs_57b1-5dse-sys -
cisco ncs_57b1-6d24-sys -
cisco ncs_57c1-48q6-sys -
cisco ncs_57c3-mod-sys -
cisco ncs_57d2-18dd-sys -
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the handling of specific packets that are punted from a line card to a route processor in Cisco IOS XR Software Release 7.9.2 could allow an unauthenticated, adjacent attacker to cause control plane traffic to stop working on multiple Cisco IOS XR platforms.\u0026nbsp;\r\n\r\nThis vulnerability is due to incorrect handling of packets that are punted to the route processor. An attacker could exploit this vulnerability by sending traffic, which must be handled by the Linux stack on the route processor, to an affected device. A successful exploit could allow the attacker to cause control plane traffic to stop working, resulting in a denial of service (DoS) condition."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la gesti\u00f3n de paquetes espec\u00edficos que se env\u00edan desde una tarjeta de l\u00ednea a un procesador de rutas en la versi\u00f3n 7.9.2 del software Cisco IOS XR podr\u00eda permitir que un atacante adyacente no autenticado provoque la interrupci\u00f3n del tr\u00e1fico del plano de control en varias plataformas Cisco IOS XR. Esta vulnerabilidad se debe a la gesti\u00f3n incorrecta de los paquetes que se env\u00edan al procesador de rutas. Un atacante podr\u00eda explotar esta vulnerabilidad enviando tr\u00e1fico, que debe ser gestionado por la pila de Linux en el procesador de rutas, a un dispositivo afectado. Una explotaci\u00f3n exitosa podr\u00eda permitir al atacante provocar la interrupci\u00f3n del tr\u00e1fico del plano de control, lo que resultar\u00eda en una denegaci\u00f3n de servicio (DoS)."
    }
  ],
  "id": "CVE-2025-20141",
  "lastModified": "2025-08-06T17:05:07.530",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 4.0,
        "source": "psirt@cisco.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-03-12T16:15:21.420",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Product"
      ],
      "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-xr792-bWfVDPY"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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