{
  "document": {
    "acknowledgments": [
      {
        "organization": "Siemens ProductCERT",
        "summary": "reporting this vulnerability to CISA."
      },
      {
        "organization": "Milestone PSIRT",
        "summary": "reporting and coordinated disclosure"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited",
      "tlp": {
        "label": "WHITE",
        "url": "https://us-cert.cisa.gov/tlp/"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "Siemens has released hotfixes for Siveillance Video Open Network Bridge (ONVIF) which fix a security vulnerability related to unsecure storage of ONVIF user credentials. The vulnerability could allow an authenticated remote attacker to retrieve and decrypt all user credentials stored on the ONVIF server.\n\nSiemens recommends to apply the hotfixes at the earliest opportunity. See also the chapter Additional Information, how to apply the hotfix.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure Siemens strongly recommends to protect network access to affected products with appropriate mechanisms. It is advised to follow recommended security practices in order to run the devices in a protected IT environment.",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "Siemens Security Advisories are subject to the terms and conditions contained in Siemens\u0027 underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter \"License Terms\"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens\u0027 Global Website (https://www.siemens.com/terms_of_use, hereinafter \"Terms of Use\"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.",
        "title": "Terms of Use"
      },
      {
        "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": "other",
        "text": "This CISA CSAF advisory was converted from Siemens ProductCERT\u0027s CSAF advisory.",
        "title": "Advisory Conversion Disclaimer"
      },
      {
        "category": "other",
        "text": "Multiple",
        "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 exploitation risk of these vulnerabilities.",
        "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 more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent 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 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. 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"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "central@cisa.dhs.gov",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-853866: User Credentials Disclosure Vulnerability in Siveillance Video Open Network Bridge (ONVIF) - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-853866.json"
      },
      {
        "category": "self",
        "summary": "SSA-853866: User Credentials Disclosure Vulnerability in Siveillance Video Open Network Bridge (ONVIF) - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-853866.txt"
      },
      {
        "category": "self",
        "summary": "SSA-853866: User Credentials Disclosure Vulnerability in Siveillance Video Open Network Bridge (ONVIF) - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-853866.pdf"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-21-103-15 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsa-21-103-15.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-21-103-15 - Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-21-103-15"
      },
      {
        "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"
      }
    ],
    "title": "Siemens and Milestone Siveillance Video Open Network Bridge",
    "tracking": {
      "current_release_date": "2025-05-06T06:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-21-103-15",
      "initial_release_date": "2021-04-13T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2021-04-13T00:00:00.000000Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2025-05-06T06:00:00.000000Z",
          "legacy_version": "Revision",
          "number": "2",
          "summary": "Revision - Fixing typos"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2020_R3",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2020_R2",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2020_R1",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0003"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2019_R3",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0004"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2019_R2",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0005"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2019_R1",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0006"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2018_R3",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0007"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "2018_R2",
                "product": {
                  "name": "Siveillance Video Open Network Bridge",
                  "product_id": "CSAFPID-0008"
                }
              }
            ],
            "category": "product_name",
            "name": "Siveillance Video Open Network Bridge"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-27392",
      "cwe": {
        "id": "CWE-321",
        "name": "Use of Hard-coded Cryptographic Key"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected Open Network Bridges store user credentials for the authentication between ONVIF clients and ONVIF server using a hard-coded key. The encrypted credentials can be retrieved via the MIP SDK.\n\nThis could allow an authenticated remote attacker to retrieve and decrypt all credentials stored on the ONVIF server.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004",
          "CSAFPID-0005",
          "CSAFPID-0006",
          "CSAFPID-0007",
          "CSAFPID-0008"
        ]
      },
      "references": [
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109791980/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109781128/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109779088/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773456/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109769052/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109766085/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109762643/"
        },
        {
          "summary": "CVE-2021-27392 - Siveillance Video Open Network Bridge",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109762751/"
        },
        {
          "summary": "CVE-2021-27392 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-27392.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for Open Network Bridge",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109791980/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0002"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109781128/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0003"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109779088/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0004"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109773456/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0005"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109769052/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0006"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109766085/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0007"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109762643/"
        },
        {
          "category": "vendor_fix",
          "details": "Apply the hotfix using the latest available installer for ONVIF Bridge",
          "product_ids": [
            "CSAFPID-0008"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109762751/"
        },
        {
          "category": "mitigation",
          "details": "Disable the Open Network Bridge (ONVIF), if not in use. Note: By default the Open Network Bridge is disabled.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 9.9,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008"
          ]
        }
      ],
      "title": "CVE-2021-27392"
    }
  ]
}