{
  "document": {
    "acknowledgments": [
      {
        "summary": "This vulnerability was found by Sanmith Prakash of Cisco during internal security testing."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition.\r\n\r\nThe vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message through an affected device. SSL/TLS messages sent to an affected device do not trigger this vulnerability. A successful exploit could allow the attacker to cause a process to crash. This crash would then trigger a reload of the device. No manual intervention is needed to recover the device after the reload.\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-ftd-ssl-decrypt-dos-DdyLuK6c [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c\"]\r\n\r\nThis advisory is part of the April 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: April 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74594\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco FTD Software, have an SSL decryption policy enabled, and are running one of the following hardware platforms:\r\n\r\n3000 Series Industrial Security Appliances (ISAs)\r\nASA 5512-X Adaptive Security Appliance\r\nASA 5515-X Adaptive Security Appliance\r\nASA 5525-X Adaptive Security Appliance\r\nASA 5545-X Adaptive Security Appliance\r\nASA 5555-X Adaptive Security Appliance\r\nFirepower 1000 Series\r\nFirepower 2100 Series\r\nFirepower Threat Defense Virtual (FTDv)\r\n\r\nFor information about which Cisco software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n  Determine Whether an SSL Decryption Policy Is Enabled\r\nThere are two methods for determining whether an SSL decryption policy is enabled:\r\n\r\nOption 1: Use the CLI\r\n\r\nUse the show ssl-policy-config CLI command to verify whether an SSL decryption policy is enabled on a device. The following example shows the output of the show ssl-policy-config command on a device that does not have an SSL policy configured and is not vulnerable:\r\n\r\n\r\n\u003e show ssl-policy-config\r\nSSL policy not yet applied.\r\n\r\nAny other output returned by the show ssl-policy-config command indicates that an SSL policy is configured and the device is vulnerable.\r\n\r\nFor more information about the show ssl-policy-config command, see the Cisco Firepower Threat Defense Command Reference [\"https://www.cisco.com/c/en/us/td/docs/security/firepower/command_ref/b_Command_Reference_for_Firepower_Threat_Defense/s_8.html#wp8230585640\"].\r\n\r\nOption 2: Use the GUI\r\n\r\nTo determine whether an SSL decryption policy is enabled on a device, check the appropriate policy:\r\n\r\nFor devices managed by Firepower Management Center (FMC) [\"https://www.cisco.com/c/en/us/td/docs/security/firepower/660/configuration/guide/fpmc-config-guide-v66/getting_started_with_ssl_policies.html#ID-2253-00000021\"]:\r\nPolicies \u003e Access Control \u003e SSL\r\nFor devices managed by Firepower Device Manager (FDM) [\"https://www.cisco.com/c/en/us/td/docs/security/firepower/660/fdm/fptd-fdm-config-guide-660/fptd-fdm-ssl-decryption.html#task_A46EB67387764C209439122818AB7B43\"]:\r\nPolicies \u003e SSL Decryption",
        "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\nAdaptive Security Appliance (ASA) Software\r\nFirepower Management Center (FMC) Software\r\nFTD Software that is running on any platform other than the platforms listed in the Vulnerable Products [\"#vp\"] section of this advisory",
        "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\nIn the following table(s), the left column lists Cisco software releases. The center column indicates whether a release is affected by the vulnerability described in this advisory and the first release that includes the fix for this vulnerability. The right column indicates whether a release is affected by any of the vulnerabilities described in this bundle and which release includes fixes for those vulnerabilities.\r\n\r\nFTD Software\r\n        Cisco FTD Software Release   First Fixed Release for This Vulnerability  Recommended Fixed Release for All Vulnerabilities Described in the Bundle of Advisories          Earlier than 6.2.21  Not vulnerable.  Migrate to a fixed release.      6.2.2  Not vulnerable.  Migrate to a fixed release.      6.2.3  Not vulnerable.  Migrate to a fixed release.      6.3.0  Migrate to a fixed release.  Migrate to a fixed release.      6.4.0  Not vulnerable.  6.4.0.12 (May 2021)      6.5.0  Not vulnerable.  Migrate to a fixed release.      6.6.0  Not vulnerable.  6.6.42      6.7.0  Not vulnerable.  6.7.0.2\r\n1. Cisco FMC and FTD Software releases 6.0.1 and earlier, as well as releases 6.2.0 and 6.2.1, have reached end of software maintenance [\"https://www.cisco.com/c/en/us/products/eos-eol-listing.html\"]. Customers are advised to migrate to a supported release that includes the fix for this vulnerability.\r\n\r\n2. The First Fixed Release for the 6.6.0 code train was 6.6.3; however, due to upgrade issues associated with CSCvx86231 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx86231\"] the recommended release is 6.6.4.\r\n\r\nTo upgrade to a fixed release of Cisco FTD Software, customers can do one of the following:\r\n\r\nFor devices that are managed by using Cisco Firepower Management Center (FMC), use the FMC interface to install the upgrade. After installation is complete, reapply the access control policy.\r\nFor devices that are managed by using Cisco Firepower Device Manager (FDM), use the FDM interface to install the upgrade. After installation is complete, reapply the access control policy.",
        "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 by Sanmith Prakash of Cisco during internal security testing.",
        "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 Firepower Threat Defense Software SSL Decryption Policy Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c"
      },
      {
        "category": "external",
        "summary": "Cisco Event Response: April 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74594"
      },
      {
        "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-ftd-ssl-decrypt-dos-DdyLuK6c",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Event Response: April 2021 Cisco\u0026nbsp;ASA, FMC, and FTD Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74594"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Firepower Threat Defense Command Reference",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/firepower/command_ref/b_Command_Reference_for_Firepower_Threat_Defense/s_8.html#wp8230585640"
      },
      {
        "category": "external",
        "summary": "Firepower Management Center (FMC)",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/firepower/660/configuration/guide/fpmc-config-guide-v66/getting_started_with_ssl_policies.html#ID-2253-00000021"
      },
      {
        "category": "external",
        "summary": "Firepower Device Manager (FDM)",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/firepower/660/fdm/fptd-fdm-config-guide-660/fptd-fdm-ssl-decryption.html#task_A46EB67387764C209439122818AB7B43"
      },
      {
        "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": "end of software maintenance",
        "url": "https://www.cisco.com/c/en/us/products/eos-eol-listing.html"
      },
      {
        "category": "external",
        "summary": "CSCvx86231",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvx86231"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Firepower Threat Defense Software SSL Decryption Policy Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2021-06-08T21:10:36+00:00",
      "generator": {
        "date": "2022-10-22T03:07:05+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-ftd-ssl-decrypt-dos-DdyLuK6c",
      "initial_release_date": "2021-04-28T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2021-04-14T21:34:35+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2021-06-08T21:10:36+00:00",
          "number": "1.1.0",
          "summary": "Updated the Fixed Releases table to more clearly identify releases that are not vulnerable."
        }
      ],
      "status": "final",
      "version": "1.1.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "service_pack",
                    "name": "6.3.0",
                    "product": {
                      "name": "6.3.0",
                      "product_id": "CSAFPID-251759"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.3.0.1",
                    "product": {
                      "name": "6.3.0.1",
                      "product_id": "CSAFPID-258065"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.3.0.2",
                    "product": {
                      "name": "6.3.0.2",
                      "product_id": "CSAFPID-258066"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.3.0.3",
                    "product": {
                      "name": "6.3.0.3",
                      "product_id": "CSAFPID-265012"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.3.0.4",
                    "product": {
                      "name": "6.3.0.4",
                      "product_id": "CSAFPID-268603"
                    }
                  },
                  {
                    "category": "service_pack",
                    "name": "6.3.0.5",
                    "product": {
                      "name": "6.3.0.5",
                      "product_id": "CSAFPID-276932"
                    }
                  }
                ],
                "category": "product_version",
                "name": "6.3"
              }
            ],
            "category": "product_family",
            "name": "Cisco Firepower Threat Defense Software"
          },
          {
            "category": "product_family",
            "name": "Cisco Firepower Threat Defense Software",
            "product": {
              "name": "Cisco Firepower Threat Defense Software ",
              "product_id": "CSAFPID-220203"
            }
          },
          {
            "category": "product_name",
            "name": "Cisco ASA 5500-X Series Firewalls",
            "product": {
              "name": "Cisco ASA 5500-X Series Firewalls",
              "product_id": "CSAFPID-277437"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.3.0 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-251759:277437"
        },
        "product_reference": "CSAFPID-251759",
        "relates_to_product_reference": "CSAFPID-277437"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.3.0.1 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-258065:277437"
        },
        "product_reference": "CSAFPID-258065",
        "relates_to_product_reference": "CSAFPID-277437"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.3.0.2 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-258066:277437"
        },
        "product_reference": "CSAFPID-258066",
        "relates_to_product_reference": "CSAFPID-277437"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.3.0.3 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-265012:277437"
        },
        "product_reference": "CSAFPID-265012",
        "relates_to_product_reference": "CSAFPID-277437"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.3.0.4 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-268603:277437"
        },
        "product_reference": "CSAFPID-268603",
        "relates_to_product_reference": "CSAFPID-277437"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Cisco Firepower Threat Defense Software 6.3.0.5 when installed on Cisco ASA 5500-X Series Firewalls",
          "product_id": "CSAFPID-276932:277437"
        },
        "product_reference": "CSAFPID-276932",
        "relates_to_product_reference": "CSAFPID-277437"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-1402",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvo46649"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-220203",
          "CSAFPID-251759:277437",
          "CSAFPID-258065:277437",
          "CSAFPID-258066:277437",
          "CSAFPID-265012:277437",
          "CSAFPID-268603:277437",
          "CSAFPID-276932:277437"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-220203",
            "CSAFPID-251759:277437",
            "CSAFPID-258065:277437",
            "CSAFPID-258066:277437",
            "CSAFPID-265012:277437",
            "CSAFPID-268603:277437",
            "CSAFPID-276932:277437"
          ],
          "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-220203",
            "CSAFPID-251759:277437",
            "CSAFPID-258065:277437",
            "CSAFPID-258066:277437",
            "CSAFPID-265012:277437",
            "CSAFPID-268603:277437",
            "CSAFPID-276932:277437"
          ]
        }
      ],
      "title": "Cisco Firepower Threat Defense Software SSL Decryption Policy Denial of Service Vulnerability"
    }
  ]
}