{
  "affected": [],
  "aliases": [
    "CVE-2018-6922"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-08-09T18:29:00Z",
    "severity": "MODERATE"
  },
  "details": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system\u0027s network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.",
  "id": "GHSA-hpq2-2fmq-c95r",
  "modified": "2022-05-13T01:31:55Z",
  "published": "2022-05-13T01:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-6922"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180815-0002"
    },
    {
      "type": "WEB",
      "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/105058"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1041425"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

{
  "GSD": {
    "alias": "CVE-2018-6922",
    "description": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system\u0027s network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.",
    "id": "GSD-2018-6922"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-6922"
      ],
      "details": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system\u0027s network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.",
      "id": "GSD-2018-6922",
      "modified": "2023-12-13T01:22:35.368667Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secteam@freebsd.org",
        "DATE_PUBLIC": "2018-08-08T00:00:00",
        "ID": "CVE-2018-6922",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "FreeBSD",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "All versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "FreeBSD"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system\u0027s network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-400: Uncontrolled Resource Consumption (\u0027Resource Exhaustion\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "FreeBSD-SA-18:08",
            "refsource": "FREEBSD",
            "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"
          },
          {
            "name": "1041425",
            "refsource": "SECTRACK",
            "url": "http://www.securitytracker.com/id/1041425"
          },
          {
            "name": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html",
            "refsource": "CONFIRM",
            "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"
          },
          {
            "name": "105058",
            "refsource": "BID",
            "url": "http://www.securityfocus.com/bid/105058"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20180815-0002/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p7:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p4:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p5:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p5:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p6:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:-:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p6:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secteam@freebsd.org",
          "ID": "CVE-2018-6922"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system\u0027s network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-400"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "FreeBSD-SA-18:08",
              "refsource": "FREEBSD",
              "tags": [
                "Patch",
                "Vendor Advisory"
              ],
              "url": "https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc"
            },
            {
              "name": "1041425",
              "refsource": "SECTRACK",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securitytracker.com/id/1041425"
            },
            {
              "name": "105058",
              "refsource": "BID",
              "tags": [
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "http://www.securityfocus.com/bid/105058"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20180815-0002/",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.netapp.com/advisory/ntap-20180815-0002/"
            },
            {
              "name": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html",
              "refsource": "CONFIRM",
              "tags": [
                "Patch"
              ],
              "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": true,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 1.4
        }
      },
      "lastModifiedDate": "2019-10-09T23:42Z",
      "publishedDate": "2018-08-09T18:29Z"
    }
  }
}

{
  "document": {
    "acknowledgments": [
      {
        "summary": "These vulnerabilities were reported by Juha-Matti Tilli, of the Aalto University Department of Communications and Networking, and Nokia Bell Labs."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "On August 6, 2018, the Vulnerability Coordination team of the National Cyber Security Centre of Finland (NCSC-FI) and the CERT Coordination Center (CERT/CC) disclosed vulnerabilities in the TCP stacks that are used by the Linux and FreeBSD kernels. These vulnerabilities are publicly known as SegmentSmack.\r\n\r\nThe vulnerabilities could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. An attack could be executed by using low transfer rates of TCP packets, unlike typical distributed denial of service (DDoS) attacks.\r\n\r\nThe vulnerabilities are due to inefficient TCP reassembly algorithms in the TCP stacks that are used by the affected kernels. Linux Kernel Versions 4.9 and later and all supported versions of the FreeBSD kernel are known to be affected by these vulnerabilities.\r\n\r\nAn attacker could exploit these vulnerabilities by sending a stream of packets that are designed to trigger the issue in an established TCP session with an affected device. A sustained DoS condition requires the attacker to maintain a continuous stream of malicious traffic. Due to the required use of an established session, an attack cannot be performed using spoofed IP addresses.\r\n\r\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "Cisco investigated its product line to determine which products and services may be affected by these vulnerabilities.\r\n\r\nThe \u201cVulnerable Products\u201d section of this advisory includes Cisco bug IDs for each affected product or service. The bugs are accessible through the Cisco Bug Search Tool [\"https://bst.cloudapps.cisco.com/bugsearch/bug/BUGID\"] and contain additional platform-specific information, including workarounds (if available) and fixed software releases.\r\n\r\nAny product or service not listed in the \u201cVulnerable Products\u201d section of this advisory is to  be considered not vulnerable.",
        "title": "Affected Products"
      },
      {
        "category": "general",
        "text": "The following table lists Cisco products that are affected by the Linux Kernel vulnerability that is described in this advisory:\r\n                                Product              Cisco Bug ID              Fixed Release Availability                                  Network and Content Security Devices                                  Cisco Threat Grid Appliance M5              CSCvk69486 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk69486\"]              2.5 (Oct-2018)                                  Routing and Switching - Enterprise and Service Provider                                  Cisco DNA Center              CSCvm34581 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm34581\"]              1.3 (Apr-2019)                                  Cisco Network Assurance Engine              CSCvm34702 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm34702\"]              3.0(0) (Nov-2018)                                  Voice and Unified Communications Devices                                  Cisco Webex Hybrid Data Security Node              CSCvm49456 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm49456\"]              Cisco will update affected systems (Nov-2018)                                  Cisco Webex Video Mesh Node              CSCvm48163 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm48163\"]              Cisco will update affected systems (Nov-2018)                                  Video, Streaming, TelePresence, and Transcoding Devices                                  Cisco Expressway Series              CSCvk74922 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74922\"]              x12.5 (Jan-2019)                                  Cisco Meeting Management              CSCvk69487 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk69487\"]              1.1.0.27 (Sept-2018)                                  Cisco TelePresence Conductor              CSCvk75754 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk75754\"]              4.3.4 MR (Nov-2018)                                  Cisco TelePresence Video Communication Server (VCS)              CSCvk74922 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74922\"]              x12.5 (Jan-2019)\r\nThe following table lists Cisco products that are affected by the FreeBSD vulnerability that is described in this advisory:\r\n                                Product              Cisco Bug ID              Fixed Release Availability                                  Network and Content Security Devices                                  Cisco Content Security Management Appliance (SMA)              CSCvk74266 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74266\"]              12.0.0 (Nov-2018)                                  Cisco Email Security Appliance (ESA)              CSCvk74109 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74109\"]              11.0.3 (Oct-2018)\r\n12.0.0 (Nov-2018)                                  Cisco Web Security Appliance (WSA)              CSCvk74112 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74112\"]              10.1.4 (Sept-2018)\r\n10.5.3 (Oct-2018)\r\n11.5.2 (Nov-2018)\r\n                                  Video, Streaming, TelePresence, and Transcoding Devices                                  Cisco TelePresence MCU 5300 Series, MSE 8510              CSCvk74254 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74254\"]              4.5(1.98) (Oct-2018)                                  Cisco TelePresence MCU MSE 8420              CSCvk74254 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74254\"]              No fix expected - End of life                                  Cisco TelePresence Server 7010 and MSE 8710              CSCvk74256 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74256\"]              4.4(1.27) (Dec-2018)                                  Cisco TelePresence Server on Multiparty Media 310, 320 and 820              CSCvk74256 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74256\"]              4.4(1.27) (Dec-2018)",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products and services listed in the \u201cVulnerable Products\u201d 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 products and services:\r\n  Network and Content Security Devices\r\nCisco Firepower Management Center\r\nVideo, Streaming, TelePresence, and Transcoding Devices\r\nCisco TelePresence MCU 4200 Series and 4500 Series\r\nCisco TelePresence Advanced Media Gateway Series",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "Any workarounds will be documented in the product-specific Cisco bugs, which are identified in the \u201cVulnerable Products\u201d section of this advisory.\r\n\r\nIt is important to note that exploitation of these vulnerabilities requires an attacker to establish a TCP three-way handshake with an  open TCP port on an affected device. Customers are therefore advised to use an external  firewall to allow only explicitly trusted source IP addresses to connect to open TCP ports on affected devices.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "For information about fixed software releases, consult the Cisco bugs identified in the \u201cVulnerable Products\u201d section of this advisory.\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 TAC or their contracted maintenance providers.",
        "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 malicious use of the vulnerabilities that are described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "These vulnerabilities were reported by Juha-Matti Tilli, of the Aalto University Department of Communications and Networking, and Nokia Bell Labs.",
        "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": "Linux and FreeBSD Kernels TCP Reassembly Denial of Service Vulnerabilities Affecting Cisco Products: August 2018",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp"
      },
      {
        "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-20180824-linux-tcp",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp"
      },
      {
        "category": "external",
        "summary": "Cisco Bug Search Tool",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/BUGID"
      },
      {
        "category": "external",
        "summary": "CSCvk69486",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk69486"
      },
      {
        "category": "external",
        "summary": "CSCvm34581",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm34581"
      },
      {
        "category": "external",
        "summary": "CSCvm34702",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm34702"
      },
      {
        "category": "external",
        "summary": "CSCvm49456",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm49456"
      },
      {
        "category": "external",
        "summary": "CSCvm48163",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm48163"
      },
      {
        "category": "external",
        "summary": "CSCvk74922",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74922"
      },
      {
        "category": "external",
        "summary": "CSCvk69487",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk69487"
      },
      {
        "category": "external",
        "summary": "CSCvk75754",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk75754"
      },
      {
        "category": "external",
        "summary": "CSCvk74922",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74922"
      },
      {
        "category": "external",
        "summary": "CSCvk74266",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74266"
      },
      {
        "category": "external",
        "summary": "CSCvk74109",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74109"
      },
      {
        "category": "external",
        "summary": "CSCvk74112",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74112"
      },
      {
        "category": "external",
        "summary": "CSCvk74254",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74254"
      },
      {
        "category": "external",
        "summary": "CSCvk74254",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74254"
      },
      {
        "category": "external",
        "summary": "CSCvk74256",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74256"
      },
      {
        "category": "external",
        "summary": "CSCvk74256",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk74256"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisories and Alerts page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Linux and FreeBSD Kernels TCP Reassembly Denial of Service Vulnerabilities Affecting Cisco Products: August 2018",
    "tracking": {
      "current_release_date": "2018-11-06T18:09:00+00:00",
      "generator": {
        "date": "2022-10-22T03:01:18+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-20180824-linux-tcp",
      "initial_release_date": "2018-08-24T21:30:00+00:00",
      "revision_history": [
        {
          "date": "2018-08-24T21:31:51+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2018-08-29T17:26:00+00:00",
          "number": "1.1.0",
          "summary": "Updated the lists of products under investigation and products confirmed not vulnerable.  \tUpdated information about fixed release availability."
        },
        {
          "date": "2018-08-30T16:55:21+00:00",
          "number": "1.2.0",
          "summary": "Updated information about fixed release availability."
        },
        {
          "date": "2018-09-04T18:05:25+00:00",
          "number": "1.3.0",
          "summary": "Updated the lists of products under investigation, vulnerable products, and products confirmed not vulnerable. Updated information about fixed release availability."
        },
        {
          "date": "2018-09-06T18:15:43+00:00",
          "number": "1.4.0",
          "summary": "Updated the lists of products under investigation and vulnerable products. Updated information about fixed release availability."
        },
        {
          "date": "2018-09-13T18:32:47+00:00",
          "number": "1.5.0",
          "summary": "Updated the lists of products under investigation. Moved Firepower Management Center to the products confirmed not vulnerable as after further evaluation, no publicly available software releases were found to be vulnerable."
        },
        {
          "date": "2018-09-17T20:47:03+00:00",
          "number": "1.6.0",
          "summary": "Updated the lists of products under investigation and vulnerable products."
        },
        {
          "date": "2018-11-06T18:09:30+00:00",
          "number": "1.7.0",
          "summary": "Updated information about fixed release availability. Removed references to ongoing investigation."
        }
      ],
      "status": "final",
      "version": "1.7.0"
    }
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-5390",
      "notes": [
        {
          "category": "general",
          "text": "No additional information for this vulneraiblity is currently avaialbe.",
          "title": "No Notes"
        }
      ],
      "release_date": "2018-08-07T16:54:00+00:00",
      "remediations": [
        {
          "category": "none_available",
          "details": "No remediation is available at this time."
        }
      ],
      "title": "Linux Kernel TCP Reassembly Algorithm Remote Denial of Service Vulnerability"
    },
    {
      "cve": "CVE-2018-6922",
      "notes": [
        {
          "category": "general",
          "text": "No additional information for this vulneraiblity is currently avaialbe.",
          "title": "No Notes"
        }
      ],
      "release_date": "2018-08-20T11:26:00+00:00",
      "remediations": [
        {
          "category": "none_available",
          "details": "No remediation is available at this time."
        }
      ],
      "title": "FreeBSD TCP Reassembly Denial of Service Vulnerability"
    }
  ]
}