{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Sergey Fedonin",
          "Ivan Kurnak"
        ],
        "organization": "Positive Technologies",
        "summary": "reporting this vulnerability to CODESYS"
      }
    ],
    "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 may allow the control programmer to call additional OS functions from the PLC logic utilizing the SysFile system library.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Critical Manufacturing",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Germany",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.\nCISA also provides a section for control systems security recommended practices on the ICS webpage onus-cert.cisa.gov. Several recommended 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 on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.\nOrganizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "other",
        "text": "No known public exploits specifically target this vulnerability.",
        "title": "Exploitability"
      }
    ],
    "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-21-173-04 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsa-21-173-04.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-21-173-04 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-21-173-04"
      },
      {
        "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://us-cert.cisa.gov/ics/tips/ICS-TIP-12-146-01B"
      }
    ],
    "title": "CODESYS Control V2 Linux SysFile library",
    "tracking": {
      "current_release_date": "2021-06-22T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-21-173-04",
      "initial_release_date": "2021-06-22T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2021-06-22T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "ICSA-21-173-04 CODESYS Control V2 Linux SysFile library"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c 2.4.7.55",
                "product": {
                  "name": "CODESYS reports all runtime systems for Linux based on a CODESYS V2 Runtime Toolkit 32-bit full: prior Version 2.4.7.55 are affected",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "CODESYS reports all runtime systems for Linux based on a CODESYS V2 Runtime Toolkit 32-bit full"
          }
        ],
        "category": "vendor",
        "name": "CODESYS, GmbH"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-30187",
      "cwe": {
        "id": "CWE-78",
        "name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The CODESYS Control runtime system enables embedded or PC-based devices to operate as programmable industrial controllers. Control programs can access local or remote input/output (I/O) locations, communication interfaces such as serial ports or sockets, and local system functions such as the file system, real-time clock, and other OS functions. An attacker could exploit this vulnerability to call additional OS functions via the SysFile system library.CVE-2021-30187 has been assigned to this vulnerability. A CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).",
          "title": "Vulnerability Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-30187"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "CODESYS GmbH has released CODESYS Runtime Toolkit 32-bit full Version 2.4.7.55 to solve the noted vulnerability issue for the affected CODESYS products.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Please visit the CODESYS update area for more information on how to obtain software updates.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://www.codesys.com/download"
        },
        {
          "category": "mitigation",
          "details": "Use controllers and devices only in a protected environment to minimize network exposure, ensuring they are not accessible from outside.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use firewalls to protect and separate the control system network from other networks.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use VPN (virtual private network) tunnels if remote access is required.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Activate and apply user management and password features.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Use encrypted communication links.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Limit access to both development and control system by physical means, operating system features, etc.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "Protect both development and control system operations by using up to date virus detecting solutions.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "mitigation",
          "details": "For more information and general recommendations for protecting machines and plants, see also the CODESYS Security Whitepaper.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://customers.codesys.com/fileadmin/data/customers/security/CODESYS-Security-Whitepaper.pdf"
        },
        {
          "category": "mitigation",
          "details": "Please see CODESYS Advisory 2021-08 for more information.",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=14727\u0026token=25159b0fc4355f4c6bc2e074a519a9d0cdb23fbb\u0026download="
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001"
          ]
        }
      ]
    }
  ]
}