{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found during internal security testing. Cisco would also like to thank Jacob Baines of Tenable for reporting this vulnerability."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in the web server for Cisco IP Phones could allow an unauthenticated, remote attacker to execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition.\r\n\r\nThe vulnerability is due to a lack of proper input validation of HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web server of a targeted device. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, 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-voip-phones-rce-dos-rB6EeRXs [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects the following Cisco products if they have web access enabled and are running a firmware release earlier than the first fixed release for that device:\r\n\r\nIP Phone 7811, 7821, 7841, and 7861 Desktop Phones\r\nIP Phone 8811, 8841, 8845, 8851, 8861, and 8865 Desktop Phones\r\nUnified IP Conference Phone 8831\r\nWireless IP Phone 8821 and 8821-EX\r\n\r\nNote: Web access is disabled by default. Administrators can check the web access configuration from Cisco Unified Communications Manager by choosing Device \u003e Phone \u003e Select a Phone and checking whether Web Access is set to Enabled or Disabled. If it is set to Disabled, the IP phone is not vulnerable.\r\n\r\nFor information about which Cisco firmware releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.",
        "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\nATA 192 Multiplatform 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 DECT 6825 with Multiplatform Firmware\r\nIP Phone 6821, 6841, 6851, 6861, and 6871 with Multiplatform Firmware\r\nIP Phone 7811, 7821, 7841, and 7861 Desktop Phones with Multiplatform Firmware\r\nIP Phone 8811, 8841, 8845, 8851, 8861, and 8865 Desktop Phones with Multiplatform Firmware\r\nSPA112 2-Port Phone Adapter\r\nSPA122 ATA with Router\r\nSPA2102 Phone Adapter with Router\r\nSPA232D Multi-Line DECT ATA\r\nSPA3102 Voice Gateway with Router\r\nSPA8000 8-Port IP Telephony Gateway\r\nSPA8800 IP Telephony Gateway with 4 FXS and 4 FXO Ports\r\nSmall Business SPA300 Series IP Phones\r\nSmall Business SPA500 Series IP Phones\r\nUnified IP Conference Phone 8831 for Third-Party Call Control\r\nUnified IP Phone 6901 and 6911\r\nUnified SIP Phone 3905",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this vulnerability.\r\n\r\nHowever, if web access is not required, disabling it is considered a mitigation for this vulnerability. If web access is disabled, the phone is not vulnerable. For additional information, see the Web Access Disable chapter of the Phone Hardening [\"https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/11_0_1/secugd/CUCM_BK_C1A78C1D_00_cucm-security-guide-1101/phone_hardening.pdf\"] guide.\r\n\r\nNote: Web access is disabled by default on Cisco IP phones.",
        "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: 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\"]\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 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  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 Phone 7811, 7821, 7841, 7861 Desktop Phones  CSCuz03016 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz03016\"]  11.7(1)      IP Phone 8811, 8841, 8845, 8851, 8861, 8865 Desktop Phones  CSCuz03016 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz03016\"]  11.7(1)      Unified IP Conference Phone 8831   CSCvs78441 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs78441\"]  10.3(1)SR6      Wireless IP Phone 8821, 8821-EX  CSCvs78272 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs78272\"]  11.0(5)SR3\r\nTo download the Cisco IP Phone firmware from the Software Center [\"https://software.cisco.com/download/navigator.html\"] on Cisco.com [\"https://www.cisco.com/\"], do the following:\r\n\r\nClick Browse all.\r\nChoose Collaboration Endpoints \u003e IP Phones.\r\nChoose a specific product from the right pane of the product selector.\r\nChoose a release from the left pane of the product page.",
        "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 aware that proof-of-concept exploit code is available for the vulnerability described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "This vulnerability was found during internal security testing. Cisco would also like to thank Jacob Baines of Tenable for reporting this vulnerability.",
        "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 Phones Web Server Remote Code Execution and Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs"
      },
      {
        "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-phones-rce-dos-rB6EeRXs",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voip-phones-rce-dos-rB6EeRXs"
      },
      {
        "category": "external",
        "summary": "Phone Hardening",
        "url": "https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/security/11_0_1/secugd/CUCM_BK_C1A78C1D_00_cucm-security-guide-1101/phone_hardening.pdf"
      },
      {
        "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 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": "CSCuz03016",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz03016"
      },
      {
        "category": "external",
        "summary": "CSCuz03016",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuz03016"
      },
      {
        "category": "external",
        "summary": "CSCvs78441",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs78441"
      },
      {
        "category": "external",
        "summary": "CSCvs78272",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvs78272"
      },
      {
        "category": "external",
        "summary": "Software Center",
        "url": "https://software.cisco.com/download/navigator.html"
      },
      {
        "category": "external",
        "summary": "Cisco.com",
        "url": "https://www.cisco.com/"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco IP Phones Web Server Remote Code Execution and Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2020-04-16T15:57:25+00:00",
      "generator": {
        "date": "2022-10-22T03:03:07+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-voip-phones-rce-dos-rB6EeRXs",
      "initial_release_date": "2020-04-15T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2020-04-14T21:13:41+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2020-04-16T15:57:25+00:00",
          "number": "1.1.0",
          "summary": "Updated Exploitation and Public Announcements to indicate that there is public exploit code."
        }
      ],
      "status": "final",
      "version": "1.1.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco IP phone",
            "product": {
              "name": "Cisco IP phone ",
              "product_id": "CSAFPID-4473"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco IP Phone 8800 Series Software",
            "product": {
              "name": "Cisco IP Phone 8800 Series Software ",
              "product_id": "CSAFPID-205455"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco IP Phone 7800 Series",
            "product": {
              "name": "Cisco IP Phone 7800 Series ",
              "product_id": "CSAFPID-211541"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco IP Phone 7800 Series with Multiplatform Firmware",
            "product": {
              "name": "Cisco IP Phone 7800 Series with Multiplatform Firmware ",
              "product_id": "CSAFPID-235374"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco IP Phone 6800 Series with Multiplatform Firmware",
            "product": {
              "name": "Cisco IP Phone 6800 Series with Multiplatform Firmware ",
              "product_id": "CSAFPID-238623"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco IP Phone 8800 Series with Multiplatform Firmware",
            "product": {
              "name": "Cisco IP Phone 8800 Series with Multiplatform Firmware ",
              "product_id": "CSAFPID-238624"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-3161",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvs78441"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCuz03016"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvs78272"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-205455",
          "CSAFPID-211541",
          "CSAFPID-235374",
          "CSAFPID-238623",
          "CSAFPID-238624",
          "CSAFPID-4473"
        ]
      },
      "release_date": "2020-04-15T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-205455",
            "CSAFPID-211541",
            "CSAFPID-235374",
            "CSAFPID-238623",
            "CSAFPID-238624",
            "CSAFPID-4473"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-205455",
            "CSAFPID-211541",
            "CSAFPID-235374",
            "CSAFPID-238623",
            "CSAFPID-238624",
            "CSAFPID-4473"
          ]
        }
      ],
      "title": "Cisco IP Phone Web Server Remote Code Execution and Denial of Service Vulnerability"
    }
  ]
}