{
  "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 IP Version 4 (IPv4) fragment reassembly function of Cisco 3500, 5500, and 8500 Series Wireless LAN Controller Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.\r\n\r\nThe vulnerability is due to a corruption of an internal data structure process that occurs when the affected software reassembles certain IPv4 packets. An attacker could exploit this vulnerability by sending certain malformed IPv4 fragments 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-20180502-wlc-ip [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects all releases of 8.4 until the first fixed release for the 5500 and 8500 Series Wireless LAN Controllers and releases 8.5.103.0 and 8.5.105.0 for the 3500, 5500, and 8500 Series Wireless LAN Controllers.\r\n\r\nFor information about which Cisco WLC Software releases are vulnerable, see the Fixed Software [\"#fixed\"] section of this advisory.\r\n\r\nDetermining the Cisco WLC Software Release\r\n\r\nTo determine which Cisco WLC Software release is running on a device, administrators can use the controller\u2019s web interface or the CLI.\r\n\r\nTo use the web interface, do the following:\r\n\r\nBy using a browser, log in to the controller\u2019s web interface.\r\nClick the Monitor tab.\r\nClick Summary in the left pane.\r\nUnder Controller Summary, the Software Version field shows the release number of the software that is currently running on the device.\r\n\r\nTo use the CLI, log in to the controller via Telnet, issue the show sysinfo command, and then refer to the value in the Product Version field of the command output. The following example shows the command output for a device that is running Cisco WLC Software Release 8.3.102.0:\r\n\r\n\r\n(wlc)\u003e show sysinfo\r\n\r\nManufacturer\u0027s Name.............................. Cisco Systems Inc.\r\nProduct Name..................................... Cisco Controller\r\nProduct Version.................................. 8.3.102.0\r\nBootloader Version............................... 1.0.1\r\nField Recovery Image Version..................... 6.0.182.0\r\nFirmware Version................................. FPGA 1.3, Env 1.6, USB console 1.27\r\nBuild Type....................................... DATA + WPS\r\n.  .  .\r\n\r\nDetermining the Cisco Mobility Express Software Release\r\n\r\nTo determine which Cisco Mobility Express Software release is running on a device, administrators can use the web interface or the CLI of the device.\r\n\r\nTo use the web interface, do the following:\r\n\r\nBy using a browser, log in to the web interface.\r\nChoose System Software \u003e Software Upgrade.\r\nRefer to the value in the System Software Version field.\r\n\r\nTo use the CLI, log in to the access point via a Telnet or SSH session, issue the show version command, and then refer to the command output. The following example shows the command output for a Cisco Aironet 1852i Access Point that is running Cisco Mobility Express Software Release 8.3.111.0:\r\n\r\n\r\nAP# show version\r\n  cisco AIR-AP1852I-UXK9 ARMv7 Processor rev 0 (v71) with 997184/525160K bytes of memory.    Processor board ID RFDP2BCR021  AP Running Image : 8.3.111.0  Primary Boot Image : 8.3.111.0  Backup Boot Image : 8.1.106.33  AP Image type : MOBILITY EXPRESS IMAGE  AP Configuration : MOBILITY EXPRESS CAPABLE  .  .  .",
        "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.",
        "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 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, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts 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\r\nCustomers Without Service Contracts\r\n\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:\r\nhttps://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\r\nFixed Releases\r\n\r\nCustomers should upgrade to an appropriate release as indicated in the table in this section. To help ensure a complete upgrade solution, consider that this advisory is part of a collection that includes the following advisories:\r\n\r\ncisco-sa-20180502-aironet-ssh [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-aironet-ssh\"]: Cisco Aironet 1800, 2800, and 3800 Series Access Points Secure Shell Privilege Escalation Vulnerability\r\ncisco-sa-20180502-ap-ptp [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-ap-ptp\"]: Cisco Aironet 1810, 1830, and 1850 Series Access Points Point-to-Point Tunneling Protocol Denial of Service Vulnerability\r\ncisco-sa-20180502-wlc-ip [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip\"]: Cisco Wireless LAN Controller IP Fragment Reassembly Denial of Service Vulnerability\r\ncisco-sa-20180502-wlc-mfdos [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-mfdos\"]: Cisco Wireless LAN Controller 802.11 Management Frame Denial of Service Vulnerability\r\n\r\nIn the following table, the left column lists major releases of Cisco software. The center column indicates whether a major release is affected by the vulnerability described in this advisory and the first minor release that includes the fix for this vulnerability. The right column indicates whether a major release is affected by all the vulnerabilities described in this collection of advisories and which release includes fixes for those vulnerabilities.\r\n                                Cisco Wireless LAN Controller Software Major Release               First Fixed Release for This Vulnerability               First Fixed Release for All Vulnerabilities Described in the Collection of Advisories                                   Prior to 8.0               Not vulnerable               Not vulnerable                                                8.1              Not vulnerable               Not vulnerable                                  8.2                            Not vulnerable               8.5.120.0                                  8.3                            Not vulnerable              8.5.120.0                                  8.4                            Affected; migrate to 8.5.110.0              8.5.120.0                                  8.5                            8.5.110.0              8.5.120.0                                  8.6                            Not vulnerable               Not vulnerable                                                8.7               Not vulnerable                            Not vulnerable",
        "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 Wireless LAN Controller IP Fragment Reassembly Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip"
      },
      {
        "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-20180502-wlc-ip",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip"
      },
      {
        "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 Security Advisories and Alerts 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-sa-20180502-aironet-ssh",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-aironet-ssh"
      },
      {
        "category": "external",
        "summary": "cisco-sa-20180502-ap-ptp",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-ap-ptp"
      },
      {
        "category": "external",
        "summary": "cisco-sa-20180502-wlc-ip",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-ip"
      },
      {
        "category": "external",
        "summary": "cisco-sa-20180502-wlc-mfdos",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-wlc-mfdos"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Wireless LAN Controller IP Fragment Reassembly Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2018-05-02T16:00:00+00:00",
      "generator": {
        "date": "2022-09-03T03:03:20+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-20180502-wlc-ip",
      "initial_release_date": "2018-05-02T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2018-05-02T14:50:18+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": "8.5.103.0",
                    "product": {
                      "name": "8.5.103.0",
                      "product_id": "CSAFPID-230842"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "8.5.105.0",
                    "product": {
                      "name": "8.5.105.0",
                      "product_id": "CSAFPID-230843"
                    }
                  }
                ],
                "category": "product_version",
                "name": "8.5"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "8.4.100.0",
                    "product": {
                      "name": "8.4.100.0",
                      "product_id": "CSAFPID-234402"
                    }
                  }
                ],
                "category": "product_version",
                "name": "8.4"
              }
            ],
            "category": "product_family",
            "name": "Cisco Wireless LAN Controller (WLC)"
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-0252",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvf89222"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-230842",
          "CSAFPID-230843",
          "CSAFPID-234402"
        ]
      },
      "release_date": "2018-05-02T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-230842",
            "CSAFPID-230843",
            "CSAFPID-234402"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-230842",
            "CSAFPID-230843",
            "CSAFPID-234402"
          ]
        }
      ],
      "title": "Cisco Wireless LAN Controller IP Fragment Reassembly Denial of Service Vulnerability "
    }
  ]
}