{
  "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 Pong tool of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition.\r\n\r\nThe vulnerability exists because the affected software attempts to free the same area of memory twice. An attacker could exploit this vulnerability by sending a pong request to an affected device from a location on the network that causes the pong reply packet to egress both a FabricPath port and a non-FabricPath port. An exploit could allow the attacker to cause a dual or quad supervisor virtual port-channel (vPC) to reload.\r\n\r\n  Note: This vulnerability is exploitable only when all of the following are true:\r\n\r\n      The Pong tool is enabled on an affected device. The Pong tool is disabled in NX-OS by default.\r\n      The FabricPath feature is enabled on an affected device. The FabricPath feature is disabled in NX-OS by default.\r\nA FabricPath port is actively monitored via a Switched Port Analyzer (SPAN) session. SPAN sessions are not configured or enabled in NX-OS by default.\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-20180117-nx-os [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nx-os\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects the following products when running Cisco NX-OS Software Release 7.2(1)D(1), 7.2(2)D1(1), or 7.2(2)D1(2) with both the Pong and FabricPath features enabled and the FabricPath port is actively monitored via a SPAN session:\r\n\r\nCisco Nexus 7000 Series Switches\r\nCisco Nexus 7700 Series Switches\r\n  To determine whether a device is running a vulnerable release of Cisco NX-OS Software, administrators can use the show version command in the NX-OS command-line interface (CLI).\r\n\r\nThe following example shows the output of the show version command for a Cisco Nexus 7000 Series Switch running Cisco NX-OS Software Release 7.2(2)D1(2):\r\nNexus# show version\r\nCisco Nexus Operating System (NX-OS) Software\r\nTAC support: http://www.cisco.com/tac\r\nDocuments: http://www.cisco.com/en/US/products/ps9372/tsd_products_support_series_home.html\r\nCopyright (c) 2002-2016, Cisco Systems, Inc. All rights reserved.\r\nThe copyrights to certain works contained in this software are\r\nowned by other third parties and used and distributed under\r\nlicense. Certain components of this software are licensed under\r\nthe GNU General Public License (GPL) version 2.0 or the GNU\r\nLesser General Public License (LGPL) Version 2.1. A copy of each\r\nsuch license is available at\r\nhttp://www.opensource.org/licenses/gpl-2.0.php and\r\nhttp://www.opensource.org/licenses/lgpl-2.1.php\r\n\r\nSoftware\r\nBIOS:      version 2.12.0\r\nkickstart: version 7.2(2)D1(2)\r\nsystem:    version 7.2(2)D1(2)\r\n.\r\n.\r\n.\r\nTo determine whether a device has the Pong tool enabled, administrators can use the show running-config | include \"feature pong\" command in the NX-OS CLI. The following example shows the output of this command for a Cisco Nexus 7000 Series Switch that has the Pong tool enabled (if this command returns empty output the Pong tool is not enabled):\r\nNexus# show running-config | include \"feature pong\"\r\nfeature pong\r\nTo determine whether a device has the FabricPath feature enabled, administrators can use the show running-config | include \"feature-set fabricpath\" command in the NX-OS CLI. The following example shows the output of this command for a Cisco Nexus 7000 Series Switch that has the FabricPath feature enabled (if this command returns empty output, the FabricPath feature is not enabled):\r\nNexus# show running-config | include \"feature-set fabricpath\"\r\nfeature-set fabricpath\r\nTo determine whether a device has a SPAN session configured, administrators can use the show running-config monitor command in NX-OS CLI. The following example shows the output of this command for a Cisco Nexus 7000 Series Switch that has a SPAN session monitoring interface Ethernet 1/10 configured and enabled (if this command returns empty output, no SPAN session is configured):\r\nNexus# show running-config monitor\r\n\r\n!Command: show running-config monitor\r\n!Time: Mon Oct  9 12:04:52 2017\r\n\r\nversion 7.2(2)D1(2)\r\nmonitor session 1\r\nsource interface Ethernet1/10 both\r\ndestination interface Ethernet1/12\r\nno shut",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "No other Cisco products are currently known to be affected by this vulnerability.\r\n\r\nCisco has confirmed that this vulnerability does not affect Cisco NX-OS Software Releases 7.2(0)D1(1) and earlier.\r\n\r\nCisco has confirmed that this vulnerability does not affect Cisco Multilayer Director Switches as the affected NX-OS releases are not available for this platform.",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "The Pong tool utilizes synchronized clocks on the network to measure real-time latency. Latency is the delay of the network between any two points as seen by a frame traveling between the two points. Pong measures port-to-port delays and is similar to the network-monitoring utility Ping but provides for a greater depth of network diagnostics.",
        "title": "Details"
      },
      {
        "category": "general",
        "text": "Exploitation of this vulnerability will cause an affected device to reload and generate a pong core file. Contact the Cisco Technical Assistance Center (TAC) to review the core file and determine whether the device has been compromised by exploitation of this vulnerability.",
        "title": "Indicators of Compromise"
      },
      {
        "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\nThis vulnerability is fixed in Cisco NX-OS Software Releases 7.3(0)D1(1) and later.\r\n  The software can be downloaded from the Software Center [\"https://software.cisco.com/download/navigator.html\"] on Cisco.com by navigating to Products \u003e Switches \u003e Data Center Switches \u003e Nexus 7000 Series Switches.",
        "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 NX-OS Software Pong Packet Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nx-os"
      },
      {
        "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-20180117-nx-os",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nx-os"
      },
      {
        "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": "Software Center",
        "url": "https://software.cisco.com/download/navigator.html"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco NX-OS Software Pong Packet Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2018-01-17T16:00:00+00:00",
      "generator": {
        "date": "2022-09-03T03:00:54+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-20180117-nx-os",
      "initial_release_date": "2018-01-17T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2018-01-17T15:35:29+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": "7.2(1)D1(1)",
                    "product": {
                      "name": "7.2(1)D1(1)",
                      "product_id": "CSAFPID-225659"
                    }
                  }
                ],
                "category": "product_version",
                "name": "7.2(1)D1"
              },
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "7.2(2)D1(2)",
                    "product": {
                      "name": "7.2(2)D1(2)",
                      "product_id": "CSAFPID-230438"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "7.2(2)D1(1)",
                    "product": {
                      "name": "7.2(2)D1(1)",
                      "product_id": "CSAFPID-230439"
                    }
                  }
                ],
                "category": "product_version",
                "name": "7.2(2)D1"
              }
            ],
            "category": "product_family",
            "name": "Cisco NX-OS Software"
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-0102",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCuv98660"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-225659",
          "CSAFPID-230438",
          "CSAFPID-230439"
        ]
      },
      "release_date": "2018-01-17T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-225659",
            "CSAFPID-230438",
            "CSAFPID-230439"
          ],
          "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-225659",
            "CSAFPID-230438",
            "CSAFPID-230439"
          ]
        }
      ],
      "title": "Cisco NX-OS Software Pong Packet Denial of Service Vulnerability"
    }
  ]
}