cisco-sa-wpa-dos-cxshjerc
Vulnerability from csaf_cisco
Published
2020-09-24 16:00
Modified
2020-09-24 16:00
Summary
Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WPA Denial of Service Vulnerability

Notes

Summary
A vulnerability in the WPA2 and WPA3 security implementation of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect packet processing during the WPA2 and WPA3 authentication handshake when configured for dot1x or pre-shared key (PSK) authentication key management (AKM) with 802.11r BSS Fast Transition (FT) enabled. An attacker could exploit this vulnerability by sending a crafted authentication packet to an affected device. A successful exploit could cause an affected device to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Note: Valid credentials for dot1x or PSK AKM to access the WLAN are required to exploit this vulnerability This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc"] This advisory is part of the September 24, 2020, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 25 Cisco Security Advisories that describe 34 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: September 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74268"].
Vulnerable Products
This vulnerability affects Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family if a device is running a vulnerable software release with dot1x or PSK AKM configured and has the FT feature enabled within a WLAN. The following hardware platforms are vulnerable: Catalyst 9800 Embedded Wireless Controller for Catalyst 9300, 9400, and 9500 Series Switches Catalyst 9800 Series Wireless Controllers For information about which Cisco software releases are vulnerable, see the Fixed Software ["#fs"] section of this advisory. Determine the Device Configuration To determine if a device has a vulnerable configuration, log in to the device and execute the show running-config all CLI command. Some configuration elements are default and will not be displayed without the all parameter. For a vulnerable AKM configuration, verify if any of the following elements are configured: A WLAN using dot1x AKM will have security wpa akm dot1x or security wpa akm ft dot1x configured. A WLAN using PSK AKM will have security wpa akm psk or security wpa akm ft psk configured. To verify if FT is enabled within a WLAN configured with a vulnerable AKM, confirm if either element listed below is present: security ft security ft adaptive Vulnerable configuration examples are as follows: Dot1x Dot1x with Adaptive 11r WLAN: wlan dot1x 1 dot1x security ft adaptive security wpa akm dot1x security dot1x authentication-list eap_methods no shutdown 11r-dot1x WLAN: wlan 11r-dot1x 2 11r-dot1x security ft security wpa akm ft dot1x security dot1x authentication-list eap_methods no shutdown PSK PSK with Adaptive 11r WLAN: wlan psk 3 psk security ft adaptive security wpa psk set-key ascii 0 cisco123 no security wpa akm dot1x security wpa akm psk no shutdown 11r-PSK WLAN: wlan 11r-psk 4 11r-psk security ft security wpa psk set-key ascii 0 cisco123 no security wpa akm dot1x security wpa akm ft psk no shutdown
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products ["#vp"] section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco products: Embedded Wireless Controller on Catalyst 9100 Access Points IOS Software IOS XR Software NX-OS Software WLC Software
Workarounds
There are no workarounds that address this vulnerability. However, customers can disable the 802.11r Fast Transition (FT) feature as a mitigation. Executing the no security ft or no security ft adaptive command will disable this feature and prevent this exploit. The following examples are for dot1x. Note: Before making this configuration change, ensure that the WLAN is in a shutdown state. 11r-dot1x WLAN: wlan 11r-dot1x 2 11r-dot1x no security ft security wpa akm ft dot1x security dot1x authentication-list eap_methods no shutdown Dot1x with Adaptive 11r WLAN: wlan dot1x 1 dot1x no security ft adaptive security wpa akm dot1x security dot1x authentication-list eap_methods no shutdown
Fixed Software
Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html ["https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"] Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page ["https://www.cisco.com/go/psirt"], to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html ["https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"] Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Cisco IOS and IOS XE Software To help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE Software, Cisco provides the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] to identify any Cisco Security Advisories that impact a specific software release and the earliest release that fixes the vulnerabilities described in each advisory (“First Fixed”). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified (“Combined First Fixed”). Customers can use the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] to search advisories in the following ways: Choose the software and one or more releases Upload a .txt file that includes a list of specific releases Enter the output of the show version command After initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication. Customers can also use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS or IOS XE Software release—for example, 15.1(4)M2 or 3.13.8S: By default, the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search. For a mapping of Cisco IOS XE Software releases to Cisco IOS Software releases, refer to the Cisco IOS XE 2 Release Notes ["https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/2/release/notes/rnasr21/rnasr21_gen.html#wp3000032"], Cisco IOS XE 3S Release Notes ["https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/3/release/notes/asr1k_rn_3s_rel_notes/asr1k_rn_3s_sys_req.html#wp3069754"], or Cisco IOS XE 3SG Release Notes ["https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_24726.html#pgfId-2570252"], depending on the Cisco IOS XE Software release.
Vulnerability Policy
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
Source
This vulnerability was found during the resolution of a Cisco TAC support case.
Legal Disclaimer
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.


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{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found during the resolution of a Cisco TAC support case."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in the WPA2 and WPA3 security implementation of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family could allow an unauthenticated, adjacent attacker to cause denial of service (DoS) condition on an affected device.\r\n\r\nThe vulnerability is due to incorrect packet processing during the WPA2 and WPA3 authentication handshake when configured for dot1x or pre-shared key (PSK) authentication key management (AKM) with 802.11r BSS Fast Transition (FT) enabled. An attacker could exploit this vulnerability by sending a crafted authentication packet to an affected device. A successful exploit could cause an affected device to reload, resulting in a DoS condition.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\nNote: Valid credentials for dot1x or PSK AKM to access the WLAN are required to exploit this vulnerability\r\n\r\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc\"]\r\n\r\nThis advisory is part of the September 24, 2020, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes 25 Cisco Security Advisories that describe 34 vulnerabilities. For a complete list of the advisories and links to them, see Cisco Event Response: September 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74268\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family if a device is running a vulnerable software release with dot1x or PSK AKM configured and has the FT feature enabled within a WLAN. The following hardware platforms are vulnerable:\r\n\r\nCatalyst 9800 Embedded Wireless Controller for Catalyst 9300, 9400, and 9500 Series Switches\r\nCatalyst 9800 Series Wireless Controllers\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n  Determine the Device Configuration\r\nTo determine if a device has a vulnerable configuration, log in to the device and execute the show running-config all CLI command. Some configuration elements are default and will not be displayed without the all parameter.\r\n\r\n\r\nFor a vulnerable AKM configuration, verify if any of the following elements are configured:\r\n\r\nA WLAN using dot1x AKM will have security wpa akm dot1x or security wpa akm ft dot1x configured.\r\nA WLAN using PSK AKM will have security wpa akm psk or security wpa akm ft psk configured.\r\n\r\nTo verify if FT is enabled within a WLAN configured with a vulnerable AKM, confirm if either element listed below is present:\r\n\r\nsecurity ft\r\nsecurity ft adaptive\r\n\r\nVulnerable configuration examples are as follows:\r\n\r\nDot1x\r\n\r\nDot1x with Adaptive 11r WLAN:\r\nwlan dot1x 1 dot1x   security ft adaptive   security wpa akm dot1x   security dot1x authentication-list eap_methods   no shutdown     11r-dot1x WLAN:  wlan 11r-dot1x 2 11r-dot1x   security ft   security wpa akm ft dot1x   security dot1x authentication-list eap_methods   no shutdown\r\n\r\nPSK\r\n\r\nPSK with Adaptive 11r WLAN:\r\nwlan psk 3 psk   security ft adaptive   security wpa psk set-key ascii 0 cisco123   no security wpa akm dot1x   security wpa akm psk   no shutdown     11r-PSK WLAN:  wlan 11r-psk 4 11r-psk   security ft   security wpa psk set-key ascii 0 cisco123   no security wpa akm dot1x   security wpa akm ft psk   no shutdown",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by this vulnerability.\r\n\r\nCisco has confirmed that this vulnerability does not affect the following Cisco products:\r\n\r\nEmbedded Wireless Controller on Catalyst 9100 Access Points\r\nIOS Software\r\nIOS XR Software\r\nNX-OS Software\r\nWLC Software",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.\r\n\r\nHowever, customers can disable the 802.11r Fast Transition (FT) feature as a mitigation. Executing the no security ft or no security ft adaptive command will disable this feature and prevent this exploit. The following examples are for dot1x.\r\n\r\nNote: Before making this configuration change, ensure that the WLAN is in a shutdown state.\r\n\r\n\r\n11r-dot1x WLAN:  wlan 11r-dot1x 2 11r-dot1x   no security ft   security wpa akm ft dot1x   security dot1x authentication-list eap_methods   no shutdown     Dot1x with Adaptive 11r WLAN:  wlan dot1x 1 dot1x   no security ft adaptive   security wpa akm dot1x   security dot1x authentication-list eap_methods   no shutdown",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:\r\nhttps://www.cisco.com/c/en/us/products/end-user-license-agreement.html [\"https://www.cisco.com/c/en/us/products/end-user-license-agreement.html\"]\r\n\r\nAdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.\r\n\r\nWhen considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n  Customers Without Service Contracts\r\nCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html [\"https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html\"]\r\n\r\nCustomers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.\r\n        Cisco IOS and IOS XE Software\r\nTo help customers determine their exposure to vulnerabilities in Cisco IOS and IOS XE Software, Cisco provides the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] to identify any Cisco Security Advisories that impact a specific software release and the earliest release that fixes the vulnerabilities described in each advisory (\u201cFirst Fixed\u201d). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities described in all the advisories identified (\u201cCombined First Fixed\u201d).\r\n\r\nCustomers can use the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] to search advisories in the following ways:\r\n\r\nChoose the software and one or more releases\r\nUpload a .txt file that includes a list of specific releases\r\nEnter the output of the show version command\r\n\r\nAfter initiating a search, customers can customize the search to include all Cisco Security Advisories, a specific advisory, or all advisories in the most recent bundled publication.\r\n\r\nCustomers can also use the following form to determine whether a release is affected by any Cisco Security Advisory by entering a Cisco IOS or IOS XE Software release\u2014for example, 15.1(4)M2 or 3.13.8S:\r\n\r\n\r\n\r\nBy default, the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] includes results only for vulnerabilities that have a Critical or High Security Impact Rating (SIR). To include results for Medium SIR vulnerabilities, customers can use the Cisco Software Checker on Cisco.com and check the Medium check box in the drop-down list under Impact Rating when customizing a search.\r\n\r\nFor a mapping of Cisco IOS XE Software releases to Cisco IOS Software releases, refer to the Cisco IOS XE 2 Release Notes [\"https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/2/release/notes/rnasr21/rnasr21_gen.html#wp3000032\"], Cisco IOS XE 3S Release Notes [\"https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/3/release/notes/asr1k_rn_3s_rel_notes/asr1k_rn_3s_sys_req.html#wp3069754\"], or Cisco IOS XE 3SG Release Notes [\"https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_24726.html#pgfId-2570252\"], depending on the Cisco IOS XE Software release.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.",
        "title": "Vulnerability Policy"
      },
      {
        "category": "general",
        "text": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "This vulnerability was found during the resolution of a Cisco TAC support case.",
        "title": "Source"
      },
      {
        "category": "legal_disclaimer",
        "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.",
        "title": "Legal Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "Emergency Support:\r\n+1 877 228 7302 (toll-free within North America)\r\n+1 408 525 6532 (International direct-dial)\r\nNon-emergency Support:\r\nEmail: psirt@cisco.com\r\nSupport requests that are received via e-mail are typically acknowledged within 48 hours.",
      "issuing_authority": "Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.\r\nMore information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WPA Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc"
      },
      {
        "category": "external",
        "summary": "Cisco Event Response: September 2020 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74268"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wpa-dos-cXshjerc"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Event Response: September 2020 Semiannual Cisco\u0026nbsp;IOS and IOS XE Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74268"
      },
      {
        "category": "external",
        "summary": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html",
        "url": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"
      },
      {
        "category": "external",
        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Security Advisories page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html",
        "url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Software Checker",
        "url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Software Checker",
        "url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Software Checker",
        "url": "https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;IOS XE 2 Release Notes",
        "url": "https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/2/release/notes/rnasr21/rnasr21_gen.html#wp3000032"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;IOS XE 3S Release Notes",
        "url": "https://www.cisco.com/c/en/us/td/docs/ios/ios_xe/3/release/notes/asr1k_rn_3s_rel_notes/asr1k_rn_3s_sys_req.html#wp3069754"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;IOS XE 3SG Release Notes",
        "url": "https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/release/note/OL_24726.html#pgfId-2570252"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WPA Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2020-09-24T16:00:00+00:00",
      "generator": {
        "date": "2022-10-22T03:06:08+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-wpa-dos-cXshjerc",
      "initial_release_date": "2020-09-24T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2020-09-23T21:33:20+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "16.10.1",
                    "product": {
                      "name": "16.10.1",
                      "product_id": "CSAFPID-225858"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.10.1s",
                    "product": {
                      "name": "16.10.1s",
                      "product_id": "CSAFPID-252913"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.10.1e",
                    "product": {
                      "name": "16.10.1e",
                      "product_id": "CSAFPID-257955"
                    }
                  }
                ],
                "category": "product_version",
                "name": "16.10"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "16.11.1",
                    "product": {
                      "name": "16.11.1",
                      "product_id": "CSAFPID-227918"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.11.1a",
                    "product": {
                      "name": "16.11.1a",
                      "product_id": "CSAFPID-252271"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.11.1b",
                    "product": {
                      "name": "16.11.1b",
                      "product_id": "CSAFPID-260741"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.11.2",
                    "product": {
                      "name": "16.11.2",
                      "product_id": "CSAFPID-261240"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.11.1c",
                    "product": {
                      "name": "16.11.1c",
                      "product_id": "CSAFPID-264096"
                    }
                  }
                ],
                "category": "product_version",
                "name": "16.11"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "16.12.1",
                    "product": {
                      "name": "16.12.1",
                      "product_id": "CSAFPID-227920"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.12.1s",
                    "product": {
                      "name": "16.12.1s",
                      "product_id": "CSAFPID-265735"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "16.12.1t",
                    "product": {
                      "name": "16.12.1t",
                      "product_id": "CSAFPID-274832"
                    }
                  }
                ],
                "category": "product_version",
                "name": "16.12"
              }
            ],
            "category": "product_family",
            "name": "Cisco IOS XE Software"
          },
          {
            "category": "product_family",
            "name": "Cisco IOS XE Software",
            "product": {
              "name": "Cisco IOS XE Software ",
              "product_id": "CSAFPID-93036"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-3429",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvr69019"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-225858",
          "CSAFPID-227918",
          "CSAFPID-227920",
          "CSAFPID-252271",
          "CSAFPID-252913",
          "CSAFPID-257955",
          "CSAFPID-260741",
          "CSAFPID-261240",
          "CSAFPID-264096",
          "CSAFPID-265735",
          "CSAFPID-274832",
          "CSAFPID-93036"
        ]
      },
      "release_date": "2020-09-24T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-225858",
            "CSAFPID-227918",
            "CSAFPID-227920",
            "CSAFPID-252271",
            "CSAFPID-252913",
            "CSAFPID-257955",
            "CSAFPID-260741",
            "CSAFPID-261240",
            "CSAFPID-264096",
            "CSAFPID-265735",
            "CSAFPID-274832",
            "CSAFPID-93036"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-225858",
            "CSAFPID-227918",
            "CSAFPID-227920",
            "CSAFPID-252271",
            "CSAFPID-252913",
            "CSAFPID-257955",
            "CSAFPID-260741",
            "CSAFPID-261240",
            "CSAFPID-264096",
            "CSAFPID-265735",
            "CSAFPID-274832",
            "CSAFPID-93036"
          ]
        }
      ],
      "title": "Cisco IOS XE Software Catalyst 9800 Series Wireless Controllers WPA Denial of Service Vulnerability"
    }
  ]
}


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