{
  "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 Server Message Block Version 2 (SMBv2) and Version 3 (SMBv3) protocol implementation for the Cisco Firepower System Software could allow an unauthenticated, remote attacker to cause the device to run low on system memory, possibly preventing the device from forwarding traffic. It is also possible that a manual reload of the device may be required to clear the condition.\r\n\r\nThe vulnerability is due to incorrect SMB header validation. An attacker could exploit this vulnerability by sending a custom SMB file transfer through the targeted device. A successful exploit could cause the device to consume an excessive amount of system memory and prevent the SNORT process from forwarding network traffic. This vulnerability can be exploited using either IPv4 or IPv6 in combination with SMBv2 or SMBv3 network traffic.\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-20181003-fp-smb-snort [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-fp-smb-snort\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "This vulnerability affects Cisco Firepower System Software running on any of the following Cisco products:\r\n\r\nAdaptive Security Appliance (ASA) 5500-X Series with FirePOWER Services\r\nAdaptive Security Appliance (ASA) 5500-X Series Next-Generation Firewalls\r\nAdvanced Malware Protection (AMP) for Networks, 7000 Series Appliances\r\nAdvanced Malware Protection (AMP) for Networks, 8000 Series Appliances\r\nFirepower 2100 Series Security Appliances\r\nFirepower 4100 Series Security Appliances\r\nFirePOWER 7000 Series Appliances\r\nFirePOWER 8000 Series Appliances\r\nFirepower 9300 Series Security Appliances\r\nFirePOWER Threat Defense for Integrated Services Routers (ISRs)\r\nFirepower Threat Defense Virtual\r\nIndustrial Ethernet 3000 Series Switches\r\nNext-Generation Intrusion Prevention System (NGIPSv)\r\nVirtual Next-Generation Intrusion Prevention System (NGIPSv)\r\n\r\nFor information about which Cisco Firepower System Software releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.\r\n  Determine the Cisco Firepower System Software Release\r\nTo determine which Cisco Firepower System Software release is running on a device, administrators can log in to the device, use the show version command in the CLI, and refer to the output of the command. The following example shows the output of the command for a device that is running Cisco Firepower System Software Release 6.2.0:\r\n\r\n\r\n\u003e show version\r\n  ---------------------[ ftd ]---------------------  Model : Cisco ASA5525-X Threat Defense (75) Version 6.2.0 (Build 362)  UUID : 2849ba3c-ecb8-11e6-98ca-b9fc2975893c  Rules update version : 2017-03-15-001-vrt  VDB version : 279  ----------------------------------------------------",
        "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  Cisco has confirmed that this vulnerability does not affect the following Cisco products:\r\n\r\nAdaptive Security Appliance (ASA) Software\r\nFirepower Management Center\r\nMeraki MX Security Appliances",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "During an active exploitation of this vulnerability, it is possible that the SNORT process could be in Disk Sleep (or in D state) as observed by the operating system command top:\r\n\r\n\r\ntop - 2017-03-20 13:34:36 up 16 days, 11:57, 0 users, load average: 1.40, 0.76\r\nTasks: 100 total, 1 running, 99 sleeping, 0 stopped, 0 zombie  Cpu(s): 6.4%us, 3.9%sy, 0.0%ni, 54.8%id, 34.0%wa, 0.0%hi, 0.0%si, 0.9%st  Mem: 3303936k total, 3181128k used, 122808k free, 16944k buffers  Swap: 3310920k total, 1346860k used, 1964060k free, 207644k cached  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND  21732 sfsnort 1 -19 2148m 1.1g 25m D 17 33.9 309:16.55 snort  21733 sfsnort 1 -19 2154m 1.1g 26m D 8 34.4 337:19.92 snort\r\n\r\nSNORT instances in the D state are hung and cannot be recovered. These unrecoverable instances could prevent traffic from passing through the device, and could indicate that the vulnerability is being exploited on the device. Please contact the Cisco Technical Assistance Center (TAC) if additional assistance is required to determine whether the device has been compromised by this vulnerability.",
        "title": "Indicators of Compromise"
      },
      {
        "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:  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, 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\r\nCustomers Without Service Contracts\r\n\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\n\r\nIn the following table, the left column lists releases of Cisco software. The right 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.\r\n\r\n                              Cisco Firepower System Software                            First Fixed Release for This\r\nVulnerability                                                   6.0\r\n              6.1.0.7                                   6.0.1                6.1.0.7                                   6.1.0               6.1.0.7                                  6.2.0               6.2.0.5                                  6.2.1                6.2.2.3                                   6.2.2               6.2.2.3\r\n                                  6.2.3\r\n               Not vulnerable\r\n\r\nTo upgrade to a fixed release of Cisco Firepower System 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 and, after installation is complete, reapply the access control policy. The Snort version that is installed depends on the FMC release.\r\nFor devices that are managed by using Cisco Adaptive Security Device Manager (ASDM) or Cisco Firepower Device Manager (FDM), use the ASDM or FDM interface to install the upgrade and, 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 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 Firepower System Software Detection Engine Denial of Service Vulnerability",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-fp-smb-snort"
      },
      {
        "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-20181003-fp-smb-snort",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181003-fp-smb-snort"
      },
      {
        "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": "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": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Firepower System Software Detection Engine Denial of Service Vulnerability",
    "tracking": {
      "current_release_date": "2018-10-03T16:00:00+00:00",
      "generator": {
        "date": "2022-09-03T03:03:23+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-20181003-fp-smb-snort",
      "initial_release_date": "2018-10-03T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2018-10-03T15:50:49+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco Firepower System Software",
            "product": {
              "name": "Cisco Firepower System Software ",
              "product_id": "CSAFPID-205007"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-0455",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvg28189"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-205007"
        ]
      },
      "release_date": "2018-10-03T16:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-205007"
          ],
          "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-205007"
          ]
        }
      ],
      "title": "Cisco Firepower System Software SMBv2 and SMBv3 SNORT Memory Leak Denial of Service Vulnerability "
    }
  ]
}