{
  "document": {
    "acknowledgments": [
      {
        "summary": "This issue was found during the resolution of a Cisco TAC support case."
      }
    ],
    "category": "csaf_informational_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "An issue with a Cisco Vulnerability Database (VDB) release for Cisco Firepower Threat Defense (FTD) Software could cause the Snort detection engine to restart unexpectedly when inspecting traffic. While the Snort detection engine is restarting, traffic could bypass Snort inspection or be dropped, depending on the device configuration. For more information, see the Details [\"#details\"] section of this advisory.\r\n\r\nThe Snort 2 and Snort 3 detection engines are both affected. The Snort detection engine will restart automatically. No manual intervention is required.\r\n\r\n\r\n\r\nThis advisory is part of the October 2024 release of the 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: October 2024 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300\"].",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This issue affects Cisco FTD Software if it is running Cisco VDB Release 396.\r\n\r\nDetermine the Cisco VDB Release\r\n\r\nTo determine which Cisco VDB release a Cisco FTD device is running, use the show version CLI command, as shown in the following example:\r\n\r\n\r\nFTD\u003e show version\r\n-------------[ ftd-fmc2-mgmt ]---------------------\r\nModel                     : Cisco Firepower Threat Defense for VMware (75) Version 7.2.8 (Build 25)\r\nUUID                      : a0ed2102-6a3e-11ef-b9a6-b8830d51972b\r\nLSP version               : lsp-rel-20240930-1858\r\nVDB version               : 396\r\n----------------------------------------------------\r\nFTD\u003e\r\n\r\nView the VDB version line. If the release is 396, the issue that is described in this advisory is present. If any other release is listed, the issue that is described in this advisory is not present.\r\n\r\nTo view the Cisco VDB release in the Cisco Secure Firewall Management Center (FMC) Software, formerly Firepower Management Center, GUI, choose Help \u003e About.",
        "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 issue.\r\n\r\nCisco has confirmed that this vulnerability does not affect the following products:\r\n\r\nCisco Adaptive Security Appliance (ASA) Software\r\nCisco FMC Software\r\nOpen Source Snort 2\r\nOpen Source Snort 3",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "The following Cisco FTD Software Snort detection engine configuration parameters govern how traffic is handled if the Snort process restarts:\r\n\r\n\r\n\r\nSnort Fail Open\r\nsnort preserve-connection\r\n\r\nFor additional information, see the Snort Restart Traffic Behavior section of the Firepower Management Center Configuration Guide [\"https://www.cisco.com/c/en/us/td/docs/security/secure-firewall/management-center/device-config/720/management-center-device-config-72/get-started-deployment.html#concept_uc1_gtq_ty\"] or the Managing Firewall Threat Defense with Cloud-delivered Firewall Management Center in Cisco Defense Orchestrator [\"https://www.cisco.com/c/en/us/td/docs/security/cdo/cloud-delivered-firewall-management-center-in-cdo/managing-firewall-threat-defense-services-with-cisco-defense-orchestrator/m_get-started-deployment.html?bookSearch=true#concept_uc1_gtq_ty\"] guide.",
        "title": "Details"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address this issue.",
        "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    Fixed Releases\r\nAt the time of publication, Cisco FTD Software contained the fix for this issue if it was running Cisco VDB Release 397 or later. Cisco VDB Release 396 has been removed from the Cisco Software Download Center [\"https://software.cisco.com/download/home\"].\r\n\r\nSee the Details section in the bug ID(s) at the top of the advisory for the most complete and current information.\r\n\r\nFor more information on upgrading the Cisco VDB, see the following resources:\r\n\r\nThe Update the Vulnerability Database (VDB) [\"https://www.cisco.com/c/en/us/td/docs/security/firepower/70/configuration/guide/fpmc-config-guide-v70/system_software_updates.html#Cisco_Concept.dita_7a4949fd-7dc1-43bc-8187-3124694c7aad\"] section of the Firepower Management Center Configuration Guide\r\nThe Updating System Databases [\"https://www.cisco.com/c/en/us/td/docs/security/firepower/70/fdm/fptd-fdm-config-guide-700/fptd-fdm-mgmt.html#id_11511\"] section of the Cisco Firepower Threat Defense Configuration Guide for Firepower Device Manager\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": "The Cisco PSIRT is not aware of any public announcements or malicious use of the issue that is described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "This issue 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": "psirt@cisco.com",
      "issuing_authority": "Cisco PSIRT",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco Firepower Threat Defense Software Vulnerability Database with Snort Detection Engine Security Policy Bypass and Denial of Service Issue",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-vdb-snort-djj4cnbR"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "Cisco Event Response: October 2024 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication",
        "url": "https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300"
      },
      {
        "category": "external",
        "summary": "Firepower Management Center Configuration Guide",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/secure-firewall/management-center/device-config/720/management-center-device-config-72/get-started-deployment.html#concept_uc1_gtq_ty"
      },
      {
        "category": "external",
        "summary": "Managing Firewall Threat Defense with Cloud-delivered Firewall Management Center in Cisco Defense Orchestrator",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/cdo/cloud-delivered-firewall-management-center-in-cdo/managing-firewall-threat-defense-services-with-cisco-defense-orchestrator/m_get-started-deployment.html?bookSearch=true#concept_uc1_gtq_ty"
      },
      {
        "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 Software Download Center",
        "url": "https://software.cisco.com/download/home"
      },
      {
        "category": "external",
        "summary": "Update the Vulnerability Database (VDB)",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/firepower/70/configuration/guide/fpmc-config-guide-v70/system_software_updates.html#Cisco_Concept.dita_7a4949fd-7dc1-43bc-8187-3124694c7aad"
      },
      {
        "category": "external",
        "summary": "Updating System Databases",
        "url": "https://www.cisco.com/c/en/us/td/docs/security/firepower/70/fdm/fptd-fdm-config-guide-700/fptd-fdm-mgmt.html#id_11511"
      }
    ],
    "title": "Cisco Firepower Threat Defense Software Vulnerability Database with Snort Detection Engine Security Policy Bypass and Denial of Service Issue",
    "tracking": {
      "current_release_date": "2024-10-23T16:00:00+00:00",
      "generator": {
        "date": "2024-10-23T15:58:59+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-ftd-vdb-snort-djj4cnbR",
      "initial_release_date": "2024-10-23T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2024-10-23T15:57:29+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  }
}