{
  "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 nginx configurations that are provided as part of the VPN-less reverse proxy for Cisco Finesse could allow an unauthenticated, remote attacker to create a denial of service (DoS) condition for new and existing users who are connected through a load balancer.\r\n\r\nThis vulnerability is due to improper IP address filtering by the reverse proxy. An attacker could exploit this vulnerability by sending a series of unauthenticated requests to the reverse proxy. A successful exploit could allow the attacker to cause all current traffic and subsequent requests to the reverse proxy through a load balancer to be dropped, resulting in a DoS condition.\r\n\r\nCisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.\r\n\r\n",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "At the time of publication, this vulnerability affected Cisco Finesse only if the reverse proxy was installed and requests to the reverse proxy were routed through the load balancer.\r\n\r\nThe following Cisco products, which may be bundled with Cisco Finesse, were also affected by this vulnerability:\r\n\r\nPackaged Contact Center Enterprise (PCCE)\r\nUnified Contact Center Enterprise (UCCE)\r\nUnified Contact Center Express (UCCX)\r\n\r\nFor information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software [\"#fs\"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.",
        "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": "A workaround for this vulnerability is available for customers who cannot upgrade to a fixed release. To coordinate implementation of the workaround, contact the Cisco Technical Assistance Center (TAC) [\"https://www.cisco.com/go/tac/\"].\r\n\r\nWhile this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "When 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\r\nAt the time of publication, the release information in the following table was accurate. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.\r\n\r\nThe left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerability that is described in this advisory and which release included the fix for this vulnerability.\r\n        Cisco Finesse Release  First Fixed Release          Earlier than 12.6(1) ES7  12.6(1) ES7\r\nIn addition to installing the fixed release, the following configurations must be applied to the reverse proxy and on any intermediary devices such as load balancers:\r\n\r\nIntermediary network devices that are front-ending the reverse proxy, such as load balancers, should be exempted from configurations that are meant for rate limiting and blocking unauthorized access to avoid blocking the reverse proxy IP address instead of the unauthorized user IP addresses. To configure these devices correctly, follow Step 1 in the Cisco Unified Contact Center Enterprise Features Guide, Release 12.6(1) - Reverse-Proxy Configuration [\"https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_12_6_1/configuration/ucce_b_features-guide-1261/rcct_m_vpnless_1261es04_appendix.html#yx4_zzt_cwb\"].\r\nIntermediary network devices that are front-ending the reverse proxy, such as load balancers, should be enabled with the capability to allow requests to contain the user IP addresses instead of the IP addresses of the intermediary devices. To configure these devices correctly, follow Steps 2 and 3 in the Cisco Unified Contact Center Enterprise Features Guide, Release 12.6(1) - Reverse-Proxy Configuration [\"https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_12_6_1/configuration/ucce_b_features-guide-1261/rcct_m_vpnless_1261es04_appendix.html#yx4_zzt_cwb\"].\r\n\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"http://www.cisco.com/web/about/security/psirt/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 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 Finesse Reverse Proxy VPN-less Access to Finesse Desktop Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-finesse-proxy-dos-vY5dQhrV"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "Cisco Technical Assistance Center (TAC)",
        "url": "https://www.cisco.com/go/tac/"
      },
      {
        "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 page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "Cisco Unified Contact Center Enterprise Features Guide, Release 12.6(1) - Reverse-Proxy Configuration",
        "url": "https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_12_6_1/configuration/ucce_b_features-guide-1261/rcct_m_vpnless_1261es04_appendix.html#yx4_zzt_cwb"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Finesse Reverse Proxy VPN-less Access to Finesse Desktop Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2023-03-02T20:35:00+00:00",
      "generator": {
        "date": "2023-03-02T20:35:05+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-finesse-proxy-dos-vY5dQhrV",
      "initial_release_date": "2023-03-01T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2023-03-01T15:51:29+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2023-03-02T20:35:00+00:00",
          "number": "1.1.0",
          "summary": "Clarified which releases are vulnerable."
        }
      ],
      "status": "final",
      "version": "1.1.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco Unified Contact Center Enterprise",
            "product": {
              "name": "Cisco Unified Contact Center Enterprise ",
              "product_id": "CSAFPID-7500"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Unified Contact Center Express",
            "product": {
              "name": "Cisco Unified Contact Center Express ",
              "product_id": "CSAFPID-92631"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Finesse",
            "product": {
              "name": "Cisco Finesse ",
              "product_id": "CSAFPID-193469"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Packaged Contact Center Enterprise",
            "product": {
              "name": "Cisco Packaged Contact Center Enterprise ",
              "product_id": "CSAFPID-244955"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-20088",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwd67008"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-193469",
          "CSAFPID-7500",
          "CSAFPID-92631",
          "CSAFPID-244955"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-7500",
            "CSAFPID-92631",
            "CSAFPID-244955",
            "CSAFPID-193469"
          ],
          "url": "https://software.cisco.com"
        },
        {
          "category": "workaround",
          "details": "A workaround for this vulnerability is available for customers who cannot upgrade to a fixed release. To coordinate implementation of the workaround, contact the Cisco Technical Assistance Center (TAC) [\"https://www.cisco.com/go/tac/\"].\r\n\r\nWhile this workaround has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.",
          "product_ids": [
            "CSAFPID-193469",
            "CSAFPID-7500",
            "CSAFPID-92631",
            "CSAFPID-244955"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-193469",
            "CSAFPID-7500",
            "CSAFPID-92631",
            "CSAFPID-244955"
          ]
        }
      ],
      "title": "Cisco Finesse Reverse Proxy Denial of Service Vulnerability"
    }
  ]
}