FKIE_CVE-2021-0239

Vulnerability from fkie_nvd - Published: 2021-04-22 20:15 - Updated: 2024-11-21 05:42
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In Juniper Networks Junos OS Evolved, receipt of a stream of specific genuine Layer 2 frames may cause the Advanced Forwarding Toolkit (AFT) manager process (Evo-aftmand), responsible for handling Route, Class-of-Service (CoS), Firewall operations within the packet forwarding engine (PFE) to crash and restart, leading to a Denial of Service (DoS) condition. By continuously sending this specific stream of genuine Layer 2 frames, an attacker can repeatedly crash the PFE, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R1-EVO. This issue does not affect Junos OS versions.
References
sirt@juniper.nethttps://kb.juniper.net/JSA11134Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://kb.juniper.net/JSA11134Vendor Advisory
Impacted products
Vendor Product Version
juniper junos_os_evolved 20.4
To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "In Juniper Networks Junos OS Evolved, receipt of a stream of specific genuine Layer 2 frames may cause the Advanced Forwarding Toolkit (AFT) manager process (Evo-aftmand), responsible for handling Route, Class-of-Service (CoS), Firewall operations within the packet forwarding engine (PFE) to crash and restart, leading to a Denial of Service (DoS) condition. By continuously sending this specific stream of genuine Layer 2 frames, an attacker can repeatedly crash the PFE, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.4R1-EVO. This issue does not affect Junos OS versions."
    },
    {
      "lang": "es",
      "value": "En Juniper Networks, Junos OS Evolved, la recepci\u00f3n de un flujo de tramas de capa 2 genuinas espec\u00edficas puede causar que el proceso de gesti\u00f3n Advanced Forwarding Toolkit (AFT) (Evo-aftmand), responsable de gestionar las operaciones de ruta, clase de servicio (CoS) y cortafuegos. dentro del packet forwarding engine (PFE) para bloquearse y reiniciarse, conllevando a una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS).\u0026#xa0;Al enviar continuamente este flujo espec\u00edfico de tramas genuinas de Capa 2, Un atacante puede ser capaz de bloquear repetidamente el PFE, provocando una Denegaci\u00f3n de Servicio (DoS) sostenida.\u0026#xa0;Este problema afecta a Juniper Networks Junos OS Evolved: todas las versiones anteriores a 20.4R1-EVO.\u0026#xa0;Este problema no afecta a Junos OS versiones"
    }
  ],
  "id": "CVE-2021-0239",
  "lastModified": "2024-11-21T05:42:16.777",
  "metrics": {
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          "authentication": "NONE",
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  "published": "2021-04-22T20:15:08.943",
  "references": [
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      "tags": [
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      "url": "https://kb.juniper.net/JSA11134"
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  "vulnStatus": "Modified",
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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.