{
  "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 TCP packet processing functionality of Cisco IP Phones could allow an unauthenticated, remote attacker to cause the phone to stop responding to incoming calls, drop connected calls, or unexpectedly reload.\r\n\r\nThe vulnerability is due to insufficient TCP ingress packet rate limiting. An attacker could exploit this vulnerability by sending a high and sustained rate of crafted TCP traffic to the targeted device. A successful exploit could allow the attacker to impact operations of the phone or cause the phone to reload, leading to a denial of service (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-voip-phone-flood-dos-YnU9EXOv [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phone-flood-dos-YnU9EXOv\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects the following Cisco IP Phones if they are running a vulnerable firmware release:\r\n\r\nIP DECT 210 Multi-Cell Base Station with Multiplatform Firmware\r\nIP DECT 6825 with Multiplatform Firmware\r\nIP Phone 8811 Series with Multiplatform Firmware\r\nIP Phone 8841 Series with Multiplatform Firmware\r\nIP Phone 8851 Series with Multiplatform Firmware\r\nIP Phone 8861 Series with Multiplatform Firmware\r\nUnified IP Conference Phone 8831 for Third-Party Call Control\r\nWebex Room Phone\r\n\r\nNote: The default configurations of these devices are vulnerable.",
        "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\nATA 190 Analog Telephone Adapter\r\nATA 191 Analog Telephone Adapter\r\nIP Conference Phone 7832\r\nIP Conference Phone 7832 with Multiplatform Firmware\r\nIP Conference Phone 8832\r\nIP Conference Phone 8832 with Multiplatform Firmware\r\nIP Phone 6800 Series with Multiplatform Firmware\r\nIP Phone 6821 with Multiplatform Firmware\r\nIP Phone 7800 Series\r\nIP Phone 7800 Series with Multiplatform Firmware\r\nIP Phone 8800 Series\r\nIP Phone 8845\r\nIP Phone 8865\r\nIP Phone 8865 with Multiplatform Firmware\r\nSPA112 2-Port Phone Adapter\r\nSPA122 Analog Telephone Adapter (ATA) with Router\r\nSPA232D Multi-Line DECT Analog Telephone Adapter (ATA)\r\nSPA525G 5-Line IP Phone\r\nUnified IP Phone 3905\r\nUnified IP Phone 6901\r\nUnified IP Phone 6911\r\nUnified IP Phone 7900 Series\r\nUnified IP Conference Phone 8831\r\nWireless IP Phone 8821\r\n\r\nNote: The devices listed may see a performance impact from the same attack traffic, but will recover without user intervention once the attack traffic is stopped.",
        "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 [\"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      Fixed Releases\r\nCustomers are advised to upgrade to an appropriate fixed firmware release as indicated in the following table:\r\n        Cisco IP Phone Model  Cisco Bug ID  First Fixed Release          IP DECT 210 Multi-Cell Base Station with Multiplatform Firmware\r\nIP DECT 6825 with Multiplatform Firmware  CSCvt83239 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt83239\"]  4.8.1      IP Phone 8811 Series with Multiplatform Firmware\r\nIP Phone 8841 Series with Multiplatform Firmware\r\nIP Phone 8851 Series with Multiplatform Firmware\r\nIP Phone 8861 Series with Multiplatform Firmware  CSCvs66815 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs66815\"]  11.3.2      Unified IP Conference Phone 8831 for Third-Party Call Control  CSCvu36012 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu36012\"]  There is no fixed firmware available at this time.       Webex Room Phone  CSCvu36026 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu36026\"]  1.2.0",
        "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 IP Phone TCP Packet Flood Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phone-flood-dos-YnU9EXOv"
      },
      {
        "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-voip-phone-flood-dos-YnU9EXOv",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phone-flood-dos-YnU9EXOv"
      },
      {
        "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": "CSCvt83239",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt83239"
      },
      {
        "category": "external",
        "summary": "CSCvs66815",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs66815"
      },
      {
        "category": "external",
        "summary": "CSCvu36012",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu36012"
      },
      {
        "category": "external",
        "summary": "CSCvu36026",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu36026"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco IP Phone TCP Packet Flood Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2021-01-19T17:34:56+00:00",
      "generator": {
        "date": "2022-10-22T03:06:58+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-voip-phone-flood-dos-YnU9EXOv",
      "initial_release_date": "2020-11-04T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2020-10-30T17:44:46+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2020-12-22T22:57:11+00:00",
          "number": "1.1.0",
          "summary": "Updated the Fixed Software section for the Webex Room Phone."
        },
        {
          "date": "2021-01-19T17:34:56+00:00",
          "number": "1.2.0",
          "summary": "Updated the Fixed Software section to indicate fix released for Webex Room Phone."
        }
      ],
      "status": "final",
      "version": "1.2.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco IP Phones with Multiplatform Firmware",
            "product": {
              "name": "Cisco IP Phones with Multiplatform Firmware ",
              "product_id": "CSAFPID-277607"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Webex Room Phone",
            "product": {
              "name": "Cisco Webex Room Phone ",
              "product_id": "CSAFPID-278888"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-3574",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvu36012"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvt83239"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvs66815"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvu36026"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-277607",
          "CSAFPID-278888"
        ]
      },
      "release_date": "2020-11-04T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-277607",
            "CSAFPID-278888"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-277607",
            "CSAFPID-278888"
          ]
        }
      ],
      "title": "Cisco IP Phone Packet Flood Denial of Service Vulnerability"
    }
  ]
}