{
  "document": {
    "acknowledgments": [
      {
        "organization": "Mitsubishi Electric",
        "summary": "reported this vulnerability to CISA"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited",
      "tlp": {
        "label": "WHITE",
        "url": "https://us-cert.cisa.gov/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "All information products included in https://us-cert.cisa.gov/ics are provided \"as is\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.",
        "title": "Legal Notice"
      },
      {
        "category": "summary",
        "text": "Successful exploitation of this vulnerability could allow a remote attacker to cause a denial-of-service condition in Ethernet communication on the module by sending specially crafted SLMP packets. A system reset of the module is required for recovery.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Critical Manufacturing",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Japan",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as: Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.",
        "title": "Recommended Practices"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "central@cisa.dhs.gov",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-24-324-01 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-324-01.json"
      },
      {
        "category": "self",
        "summary": "ICSA Advisory ICSA-24-324-01 - Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-24-324-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/topics/industrial-control-systems"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ncas/tips/ST04-014"
      }
    ],
    "title": "Mitsubishi Electric MELSEC iQ-F Series (Update A)",
    "tracking": {
      "current_release_date": "2026-03-31T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-24-324-01",
      "initial_release_date": "2024-11-19T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2024-11-19T00:00:00.000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "Initial Publication"
        },
        {
          "date": "2026-03-31T00:00:00.000Z",
          "number": "2",
          "summary": "Update A - Revised version \"FX5-ENET\"."
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e=1.100|\u003c=1.200",
                "product": {
                  "name": "Mitsubishi Electric MELSEC iQ-F Series FX5-ENET: \u003e=1.100|\u003c=1.200",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "MELSEC iQ-F Series FX5-ENET"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e=1.100|\u003c=1.104",
                "product": {
                  "name": "Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP: \u003e=1.100|\u003c=1.104",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "MELSEC iQ-F Series FX5-ENET/IP"
          }
        ],
        "category": "vendor",
        "name": "Mitsubishi Electric"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2024-8403",
      "cwe": {
        "id": "CWE-1287",
        "name": "Improper Validation of Specified Type of Input"
      },
      "notes": [
        {
          "category": "summary",
          "text": "A denial-of-service vulnerability due to improper validation of a specified type of input exists in MELSEC iQ-F Ethernet Module and EtherNet/IP Module. This vulnerability allows a remote attacker to cause a denial-of-service condition in Ethernet communication on the module by sending specially crafted SLMP packets.",
          "title": "Vulnerability Summary"
        },
        {
          "category": "details",
          "text": "SSVCv2/E:N/A:Y/T:P/2026-03-31T00:00:00Z/",
          "title": "SSVC"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "www.cve.org",
          "url": "https://www.cve.org/CVERecord?id=CVE-2024-8403"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Mitsubishi Electric is releasing fixed version 1.210 or later for MELSEC iQ-F Series FX5-ENET. Users may download a firmware update file from the link [\"https://www.mitsubishielectric.com/fa/download/index.html\"](https://www.mitsubishielectric.com/fa/download/index.html) and install it. For more information on the fixed version, refer to the Mitsubishi Electric security advisory at [\"https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2024-009_en.pdf\"](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2024-009_en.pdf).",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2024-009_en.pdf"
        },
        {
          "category": "vendor_fix",
          "details": "Mitsubishi Electric is releasing fixed version 1.106 or later for MELSEC iQ-F Series FX5-ENET/IP. Please download a firmware update file from the link [\"https://www.mitsubishielectric.com/fa/download/index.html\"](https://www.mitsubishielectric.com/fa/download/index.html) and install it. For more information on the fixed version, refer to the Mitsubishi Electric security advisory at [\"https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2024-009_en.pdf\"](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2024-009_en.pdf).",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "url": "https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2024-009_en.pdf"
        },
        {
          "category": "mitigation",
          "details": "For users of the affected products, Mitsubishi Electric recommends using within a LAN and blocking access from untrusted networks and hosts through firewalls, to minimize the risk of exploiting this vulnerability.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "For users of the affected products, Mitsubishi Electric recommends restricting physical access to the products, as well as to computers and network devices located within the same network as the products, to minimize the risk of exploiting this vulnerability.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "For users of the affected products, Mitsubishi Electric recommends using a firewall or virtual private network (VPN), etc. to prevent unauthorized access when internet access is required, to minimize the risk of exploiting this vulnerability.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "mitigation",
          "details": "For users of the affected products, Mitsubishi Electric recommends using IP filter function to block access from untrusted hosts, to minimize the risk of exploiting this vulnerability. For details on the IP filter function, please refer to the manual (MELSEC iQ-F FX5 User\u0027s Manual (Communication) \"13.1 IP Filter Function\").",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        }
      ]
    }
  ]
}