{
  "document": {
    "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": "general",
        "text": "This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov",
        "title": "CISA Disclaimer"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Locate control system networks and remote devices behind firewalls and isolating them from business networks.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs). Recognize VPNs may have vulnerabilities, should be updated to the most recent version available, and are 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. 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 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": "CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.",
        "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-16-313-03 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2016/icsa-16-313-03.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-16-313-03 - Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-16-313-03"
      },
      {
        "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/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/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.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": "OSIsoft PI System Incomplete Model of Endpoint Features Vulnerability",
    "tracking": {
      "current_release_date": "2025-06-05T22:02:02.695028Z",
      "generator": {
        "date": "2025-06-05T22:02:02.694916Z",
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-16-313-03",
      "initial_release_date": "2016-08-12T06:00:00.000000Z",
      "revision_history": [
        {
          "date": "2016-08-12T06:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "Initial Publication"
        },
        {
          "date": "2025-06-05T22:02:02.695028Z",
          "legacy_version": "CSAF Conversion",
          "number": "2",
          "summary": "Advisory converted into a CSAF"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.8.0",
                "product": {
                  "name": "OSIsoft Applications using PI Asset Framework (AF) Client 2016: \u003c2.8.0",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "Applications using PI Asset Framework (AF) Client 2016"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c1.4.6",
                "product": {
                  "name": "OSIsoft Applications using PI Software Development Kit (SDK) 2016: \u003c1.4.6",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "Applications using PI Software Development Kit (SDK) 2016"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=4.4",
                "product": {
                  "name": "OSIsoft PI Buffer Subsystem: \u003c=4.4",
                  "product_id": "CSAFPID-0003"
                }
              }
            ],
            "category": "product_name",
            "name": "PI Buffer Subsystem"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c3.4.395.64",
                "product": {
                  "name": "OSIsoft PI Data Archive 2105: \u003c3.4.395.64",
                  "product_id": "CSAFPID-0004"
                }
              }
            ],
            "category": "product_name",
            "name": "PI Data Archive 2105"
          }
        ],
        "category": "vendor",
        "name": "OSIsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2016-8365",
      "cwe": {
        "id": "CWE-437",
        "name": "Incomplete Model of Endpoint Features"
      },
      "notes": [
        {
          "category": "summary",
          "text": "OSIsoft PI System software (Applications using PI Asset Framework (AF) Client versions prior to PI AF Client 2016, Version 2.8.0; Applications using PI Software Development Kit (SDK) versions prior to PI SDK 2016, Version 1.4.6; PI Buffer Subsystem, versions prior to and including, Version 4.4; and PI Data Archive versions prior to PI Data Archive 2015, Version 3.4.395.64) operates between endpoints without a complete model of endpoint features potentially causing the product to perform actions based on this incomplete model, which could result in a denial of service. OSIsoft reports that in order to exploit the vulnerability an attacker would need to be locally connected to a server. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "To fully address potential for data loss or disconnection due to this issue, OSIsoft encourages users to upgrade to: PI Buffer Subsystem Version 4.5.0 or later, PI AF Client 2016 Version 2.8.0 or later, PI SDK 2016 Version 1.4.6 or later, PI Data Archive 2016 Version 3.4.400.1162 or later",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004"
          ]
        },
        {
          "category": "mitigation",
          "details": "For additional information about the vulnerability and recommended mitigation plan, OSIsoft\u2019s security bulletin AL00308, OSIsoft Releases Security Updates for Core Networking Component in PI System 2016 is available at the following location: (https://techsupport.osisoft.com/Troubleshooting/Alerts/AL00308)",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004"
          ],
          "url": "https://techsupport.osisoft.com/Troubleshooting/Alerts/AL00308"
        },
        {
          "category": "mitigation",
          "details": "In order to perform the upgrades, users can use the PI AF Client 2016 Install Kit to upgrade PI AF Client and the PI Buffer Subsystem together. Users can use the PI SDK 2016 Install Kit to upgrade the PI SDK. If PI Buffer Subsystem is installed on a machine without PI AF Client, users can use the PI Interface Configuration Utility (ICU) Install Kit (1.4.16.79B) to upgrade buffering without installing the PI AF Client software.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004"
          ]
        },
        {
          "category": "mitigation",
          "details": "OSIsoft also offers the following defensive measures: Use transport security protection for all remote connections to the PI Data Archive Server to block attacks from adjacent networks. PI AF Client 2015, Version 2.7 and PI Buffer Subsystem, Version 4.4 automatically enable transport security with PI Data Archive Server 2015, Version 3.4.395.64 or later when the connecting application uses Windows Integrated Security (WIS). In order to verify an application is connecting with WIS and using transport security, review the PI Data Archive Server message log entries. For each successful connection, there will be a message with event ID 7082. The Method should be \u201cWindows Login,\u201d and if the connection is using transport security, then the ciphers will also be listed. If users are running PI Data Archive PR1, Version 3.4.375.38, to avoid data loss, it is imperative to upgrade PI SDK, PI AF Client, and PI Buffer Subsystem nodes before the PI Data Archive.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004"
          ]
        }
      ]
    }
  ]
}