{
  "document": {
    "acknowledgments": [
      {
        "organization": "UK\u0027s National Cyber Security Centre (NCSC)",
        "summary": "reporting this vulnerability to AVEVA"
      }
    ],
    "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": "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": "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 an unauthenticated user to read data, cause a denial of service, and tamper with alarm states. ",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Critical Manufacturing",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "United Kingdom",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Locate control system networks and remote devices behind firewalls and isolate them from business networks.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "When remote access is required, use 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 its 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 at 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": "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 exploits specifically target this vulnerability.",
        "title": "Recommended Practices"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "Email: CISAservicedesk@cisa.dhs.gov;\n Toll Free: 1-888-282-0870",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-23-073-04 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2023/icsa-23-073-04.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-23-073-04 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04"
      },
      {
        "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://us-cert.cisa.gov/ics/Recommended-Practices"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://cisa.gov/ics"
      }
    ],
    "title": "AVEVA Plant SCADA and AVEVA Telemetry Server",
    "tracking": {
      "current_release_date": "2023-03-29T18:39:49.233100Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-23-073-04",
      "initial_release_date": "2023-03-29T18:39:49.233100Z",
      "revision_history": [
        {
          "date": "2023-03-29T18:39:49.233100Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "CSAF Creation Date"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c= 10",
                "product": {
                  "name": "AVEVA Plant SCADA 2023, AVEVA Plant SCADA 2020R2: Update 10 and all prior versions",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "AVEVA Plant SCADA 2023, AVEVA Plant SCADA 2020R2"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c= SP1",
                "product": {
                  "name": "AVEVA Telemetry Server 2020 R2: SP1 and all prior versions",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "AVEVA Telemetry Server 2020 R2"
          }
        ],
        "category": "vendor",
        "name": "AVEVA"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-1256",
      "cwe": {
        "id": "CWE-285",
        "name": "Improper Authorization"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The listed versions of AVEVA Plant SCADA and AVEVA Telemetry Server are vulnerable to an improper authorization exploit, which could allow an unauthenticated user to remotely read data, cause a denial-of-service condition, and tamper with alarm states. CVE-2023-1256 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-1256"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "AVEVA has released the following fixes for the following products:",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "All affected versions in \u201cmainstream support\u201d can be fixed by upgrading to AVEVA Plant SCADA 2023 Update 1 or later.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://softwaresupportsp.aveva.com/#/producthub/details?id=a145b006-e73d-44d5-9299-08dadcec1ff5"
        },
        {
          "category": "vendor_fix",
          "details": "AVEVA Plant SCADA 2020R2 can alternatively be patched with AVEVA Plant SCADA 2020R2 Update 11 or later. For additional upgrade information, refer to the AVEVA Plant SCADA upgrade guide.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://softwaresupportsp.aveva.com/#/producthub/details?id=8ad9833a-cc4e-4d45-9298-08dadcec1ff5"
        },
        {
          "category": "vendor_fix",
          "details": "All affected versions in \u201cmainstream support\u201d can be fixed by upgrading to AVEVA Telemetry Server 2020 R2 SP2 or later.",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "url": "https://softwaresupportsp.aveva.com/#/connectivityhub/details?id=4bbbab19-b1b2-4b0d-ba12-08dafa4ad12d"
        },
        {
          "category": "vendor_fix",
          "details": "For more information on this vulnerability, including security updates, users should see security bulletin AVEVA-2023-002",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002"
          ]
        }
      ]
    }
  ]
}