FKIE_CVE-2021-34740

Vulnerability from fkie_nvd - Published: 2021-09-23 03:15 - Updated: 2024-11-21 06:11
Severity ?
7.4 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
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 WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of the affected device.
References
psirt@cisco.comhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-wpa-pktleak-dos-uSTyGrLVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-wpa-pktleak-dos-uSTyGrLVendor Advisory
Impacted products
Vendor Product Version
cisco aironet_access_point_software *
cisco aironet_access_point_software 17.2
cisco aironet_access_point_software 17.3
cisco 1100-4g\/6g_integrated_services_router -
cisco 1100-4p_integrated_services_router -
cisco 1100-8p_integrated_services_router -
cisco 1100_integrated_services_router -
cisco 1101-4p_integrated_services_router -
cisco 1101_integrated_services_router -
cisco 1109-2p_integrated_services_router -
cisco 1109-4p_integrated_services_router -
cisco 1109_integrated_services_router -
cisco 1111x-8p_integrated_services_router -
cisco 1111x_integrated_services_router -
cisco 111x_integrated_services_router -
cisco 1120_integrated_services_router -
cisco 1160_integrated_services_router -
cisco 6300_series_access_points -
cisco aironet_1540 -
cisco aironet_1542d -
cisco aironet_1542i -
cisco aironet_1560 -
cisco aironet_1562d -
cisco aironet_1562e -
cisco aironet_1562i -
cisco aironet_1800 -
cisco aironet_1800i -
cisco aironet_1810 -
cisco aironet_1810w -
cisco aironet_1815 -
cisco aironet_1815i -
cisco aironet_1830 -
cisco aironet_1830e -
cisco aironet_1830i -
cisco aironet_1840 -
cisco aironet_1850 -
cisco aironet_1850e -
cisco aironet_1850i -
cisco aironet_2800 -
cisco aironet_2800e -
cisco aironet_2800i -
cisco aironet_3800 -
cisco aironet_3800e -
cisco aironet_3800i -
cisco aironet_3800p -
cisco aironet_4800 -
cisco catalyst_9100 -
cisco catalyst_9105 -
cisco catalyst_9105axi -
cisco catalyst_9105axw -
cisco catalyst_9115 -
cisco catalyst_9115_ap -
cisco catalyst_9115axe -
cisco catalyst_9115axi -
cisco catalyst_9117 -
cisco catalyst_9117_ap -
cisco catalyst_9117axi -
cisco catalyst_9120 -
cisco catalyst_9120_ap -
cisco catalyst_9120axe -
cisco catalyst_9120axi -
cisco catalyst_9120axp -
cisco catalyst_9124 -
cisco catalyst_9124axd -
cisco catalyst_9124axi -
cisco catalyst_9130 -
cisco catalyst_9130_ap -
cisco catalyst_9130axe -
cisco catalyst_9130axi -
cisco catalyst_iw6300 -
cisco catalyst_iw6300_ac -
cisco catalyst_iw6300_dc -
cisco catalyst_iw6300_dcw -
To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability in the WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of the affected device."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad en la implementaci\u00f3n WLAN Control Protocol (WCP) para Cisco Aironet Access Point (AP) software podr\u00eda permitir a un atacante adyacente no autenticado causar una recarga de un dispositivo afectado, resultando en una condici\u00f3n de denegaci\u00f3n de servicio (DoS). Esta vulnerabilidad es debido al manejo incorrecto de errores cuando un dispositivo afectado recibe una trama 802.11 inesperada. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de determinadas tramas 802.11 a trav\u00e9s de la red inal\u00e1mbrica a una interfaz de un AP afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante causar un filtrado de b\u00fafer de paquetes. Esto podr\u00eda resultar eventualmente en fallos en la asignaci\u00f3n del b\u00fafer, lo que desencadenar\u00eda una recarga del dispositivo afectado"
    }
  ],
  "id": "CVE-2021-34740",
  "lastModified": "2024-11-21T06:11:05.760",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "ADJACENT_NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 6.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 6.5,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "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": "Secondary"
      },
      {
        "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": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-09-23T03:15:19.947",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-wpa-pktleak-dos-uSTyGrL"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-airo-wpa-pktleak-dos-uSTyGrL"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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.