{
  "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 UDP processing functionality of Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Points could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.\r\n\r\nThis vulnerability is due to the improper processing of UDP datagrams. An attacker could exploit this vulnerability by sending malicious UDP datagrams to an affected device. A successful exploit could allow the attacker to cause the 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\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-udp-dos-XDyEwhNz [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-udp-dos-XDyEwhNz\"]\r\n\r\nThis advisory is part of the September 2022 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74745\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects Cisco Catalyst 9100 Series Access Points if they are running a vulnerable release of Cisco IOS XE Software and they have High Availability mode enabled.\r\n\r\nNote: High Availability mode is enabled by default and is automatically configured in environments with two or more connected access points.\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n\r\nDetermine Whether High Availability Mode is Enabled\r\n\r\nTo determine whether High Availability mode is enabled, use the show wireless ewc-ap redundancy summary CLI command on the access point and compare it to the following output:\r\n\r\n\r\nap-hostname#show wireless ewc-ap redundancy summary\r\nPreferred Master: APC4F7.D54D.5698\r\nRole      AP-Name                            State\r\n----------------------------------------------------------------\r\nActive    APA453.0E7B.D78C                   Ready  Standby   AP8BCD.F00B.A43C                   Ready\r\n\r\nIf the output shows Active or Standby Ready, the device has High Availability mode enabled.",
        "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\nCatalyst 9800-CL Wireless Controllers for Cloud\r\nCatalyst 9800 Embedded Wireless Controllers for Catalyst 9300, 9400, and 9500 Series Switches\r\nCatalyst 9800 Series Wireless Controllers\r\nIOS Software\r\nIOS XR Software\r\nMeraki products\r\nNX-OS Software\r\nWireless LAN Controller (WLC) AireOS Software",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Cisco has released free software updates [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu\"] that address the vulnerability described in this advisory. Customers with service contracts that entitle them to regular software updates should obtain security fixes through their usual update channels.\r\n\r\nCustomers 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\nThe Cisco Support and Downloads page [\"https://www.cisco.com/c/en/us/support/index.html\"] on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool.\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\"]. This tool identifies any Cisco security advisories that impact a specific software release and the earliest release that fixes the vulnerabilities that are described in each advisory (\u201cFirst Fixed\u201d). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities that are described in all the advisories that the Software Checker identifies (\u201cCombined First Fixed\u201d).\r\n\r\nTo use the tool, go to the Cisco Software Checker [\"https://sec.cloudapps.cisco.com/security/center/softwarechecker.x\"] page and follow the instructions. Alternatively, use the following form to determine whether a release is affected by any Cisco Security Advisory. To use the form, follow these steps:\r\n\r\nChoose which advisories the tool will search\u2014only this advisory, only advisories with a Critical or High Security Impact Rating (SIR) [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#asr\"], or all advisories.\r\nEnter a release number\u2014for example, 15.9(3)M2 or 17.3.3.\r\nClick Check.\r\n\r\n       Only this advisory  All Critical and High advisories  All advisories",
        "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 Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Points UDP Processing Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-udp-dos-XDyEwhNz"
      },
      {
        "category": "external",
        "summary": "Cisco Event Response: September 2022 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74745"
      },
      {
        "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-wlc-udp-dos-XDyEwhNz",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-udp-dos-XDyEwhNz"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Event Response: September 2022 Semiannual Cisco\u0026nbsp;IOS and IOS XE Software Security Advisory Bundled Publication.",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74745"
      },
      {
        "category": "external",
        "summary": "free software updates",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#ssu"
      },
      {
        "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": "Cisco\u0026nbsp;Support and Downloads page",
        "url": "https://www.cisco.com/c/en/us/support/index.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": "Security Impact Rating (SIR)",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#asr"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Points UDP Processing Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2022-09-28T16:00:00+00:00",
      "generator": {
        "date": "2022-10-22T03:16:03+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-wlc-udp-dos-XDyEwhNz",
      "initial_release_date": "2022-09-28T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2022-09-28T15:46:23+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": "17.6.1",
                    "product": {
                      "name": "17.6.1",
                      "product_id": "CSAFPID-262592"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.2",
                    "product": {
                      "name": "17.6.2",
                      "product_id": "CSAFPID-282117"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.1w",
                    "product": {
                      "name": "17.6.1w",
                      "product_id": "CSAFPID-284161"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.1a",
                    "product": {
                      "name": "17.6.1a",
                      "product_id": "CSAFPID-284179"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.1x",
                    "product": {
                      "name": "17.6.1x",
                      "product_id": "CSAFPID-284740"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.3",
                    "product": {
                      "name": "17.6.3",
                      "product_id": "CSAFPID-286409"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.1y",
                    "product": {
                      "name": "17.6.1y",
                      "product_id": "CSAFPID-286477"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.6.3a",
                    "product": {
                      "name": "17.6.3a",
                      "product_id": "CSAFPID-286594"
                    }
                  }
                ],
                "category": "product_version",
                "name": "17.6"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "17.7.1",
                    "product": {
                      "name": "17.7.1",
                      "product_id": "CSAFPID-277357"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.7.1a",
                    "product": {
                      "name": "17.7.1a",
                      "product_id": "CSAFPID-285329"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.7.1b",
                    "product": {
                      "name": "17.7.1b",
                      "product_id": "CSAFPID-286410"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.7.2",
                    "product": {
                      "name": "17.7.2",
                      "product_id": "CSAFPID-286534"
                    }
                  }
                ],
                "category": "product_version",
                "name": "17.7"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "17.8.1",
                    "product": {
                      "name": "17.8.1",
                      "product_id": "CSAFPID-278023"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "17.8.1a",
                    "product": {
                      "name": "17.8.1a",
                      "product_id": "CSAFPID-286486"
                    }
                  }
                ],
                "category": "product_version",
                "name": "17.8"
              }
            ],
            "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-2022-20848",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwb18118"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-262592",
          "CSAFPID-277357",
          "CSAFPID-278023",
          "CSAFPID-282117",
          "CSAFPID-284161",
          "CSAFPID-284179",
          "CSAFPID-284740",
          "CSAFPID-285329",
          "CSAFPID-286409",
          "CSAFPID-286410",
          "CSAFPID-286477",
          "CSAFPID-286486",
          "CSAFPID-286534",
          "CSAFPID-286594",
          "CSAFPID-93036"
        ]
      },
      "release_date": "2022-09-28T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-262592",
            "CSAFPID-277357",
            "CSAFPID-278023",
            "CSAFPID-282117",
            "CSAFPID-284161",
            "CSAFPID-284179",
            "CSAFPID-284740",
            "CSAFPID-285329",
            "CSAFPID-286409",
            "CSAFPID-286410",
            "CSAFPID-286477",
            "CSAFPID-286486",
            "CSAFPID-286534",
            "CSAFPID-286594",
            "CSAFPID-93036"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-262592",
            "CSAFPID-277357",
            "CSAFPID-278023",
            "CSAFPID-282117",
            "CSAFPID-284161",
            "CSAFPID-284179",
            "CSAFPID-284740",
            "CSAFPID-285329",
            "CSAFPID-286409",
            "CSAFPID-286410",
            "CSAFPID-286477",
            "CSAFPID-286486",
            "CSAFPID-286534",
            "CSAFPID-286594",
            "CSAFPID-93036"
          ]
        }
      ],
      "title": "Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers UDP Processing Denial of Service Vulnerability"
    }
  ]
}