SSA-542525

Vulnerability from csaf_siemens - Published: 2020-09-08 00:00 - Updated: 2021-06-08 00:00
Summary
SSA-542525: Authentication Vulnerabilities in SIMATIC HMI Products

Notes

Summary
SIMATIC HMI Products are affected by two vulnerabilities that could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack. Siemens has released updates for the affected products and recommends to update to the latest versions. Siemens also suggests following the listed mitigations for the Unified Comfort Panels.
General Recommendations
As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use
Siemens Security Advisories are subject to the terms and conditions contained in Siemens' 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' 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.
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{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Joseph Gardiner"
        ],
        "organization": "Bristol Cyber Security Group - University of Bristol",
        "summary": "reporting the vulnerabilities"
      }
    ],
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "SIMATIC HMI Products are affected by two vulnerabilities that could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.\n\nSiemens has released updates for the affected products and recommends to update to the latest versions. Siemens also suggests following the listed mitigations for the Unified Comfort Panels.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\n\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "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"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "productcert@siemens.com",
      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-542525: Authentication Vulnerabilities in SIMATIC HMI Products - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-542525: Authentication Vulnerabilities in SIMATIC HMI Products - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-542525.txt"
      },
      {
        "category": "self",
        "summary": "SSA-542525: Authentication Vulnerabilities in SIMATIC HMI Products - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-542525.json"
      }
    ],
    "title": "SSA-542525: Authentication Vulnerabilities in SIMATIC HMI Products",
    "tracking": {
      "current_release_date": "2021-06-08T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-542525",
      "initial_release_date": "2020-09-08T00:00:00Z",
      "revision_history": [
        {
          "date": "2020-09-08T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2020-10-13T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added mitigations and fix dates"
        },
        {
          "date": "2020-12-08T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Added patch links for SIMATIC HMI Basic (2nd generation), Comfort (including SIPLUS variants) and Mobile Panels"
        },
        {
          "date": "2021-06-08T00:00:00Z",
          "legacy_version": "1.3",
          "number": "4",
          "summary": "Added patch link for Unified Comfort Panel, and mitigation for components that will not be remediated due to limitations."
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V16",
                "product": {
                  "name": "SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c= V16",
                "product": {
                  "name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c= V16",
                "product": {
                  "name": "SIMATIC HMI Mobile Panels",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI Mobile Panels"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c= V16",
                "product": {
                  "name": "SIMATIC HMI Unified Comfort Panels",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC HMI Unified Comfort Panels"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-15786",
      "cwe": {
        "id": "CWE-307",
        "name": "Improper Restriction of Excessive Authentication Attempts"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected devices insufficiently block excessive authentication attempts.\n\nThis could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-15786 - SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109775861"
        },
        {
          "summary": "CVE-2020-15786 - SIMATIC HMI Comfort Panels (incl. SIPLUS variants)",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109775861"
        },
        {
          "summary": "CVE-2020-15786 - SIMATIC HMI Mobile Panels",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109775861"
        },
        {
          "summary": "CVE-2020-15786 - SIMATIC HMI Unified Comfort Panels",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109746530"
        },
        {
          "summary": "CVE-2020-15786 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-15786.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V16 Update 3",
          "product_ids": [
            "1",
            "2",
            "3"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109775861"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V16 Update 5",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109746530"
        },
        {
          "category": "mitigation",
          "details": "Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security",
          "product_ids": [
            "1",
            "2",
            "3",
            "4"
          ]
        },
        {
          "category": "mitigation",
          "details": "For Unified Comfort Panels using SmartClient: The password truncation (CVE-2020-15787) cannot be resolved due to RFC 6143 and is limited to 8 characters. It is recommended to use complex passwords",
          "product_ids": [
            "1",
            "2",
            "3",
            "4"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4"
          ]
        }
      ],
      "title": "CVE-2020-15786"
    },
    {
      "cve": "CVE-2020-15787",
      "cwe": {
        "id": "CWE-305",
        "name": "Authentication Bypass by Primary Weakness"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Affected devices insufficiently validate authentication attempts as the information given can be truncated to match only a set number of characters versus the whole provided string.\n\nThis could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "4"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-15787 - SIMATIC HMI Unified Comfort Panels",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109746530"
        },
        {
          "summary": "CVE-2020-15787 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-15787.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V16 Update 5",
          "product_ids": [
            "4"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109746530"
        },
        {
          "category": "mitigation",
          "details": "Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security",
          "product_ids": [
            "4"
          ]
        },
        {
          "category": "mitigation",
          "details": "For Unified Comfort Panels using SmartClient: The password truncation (CVE-2020-15787) cannot be resolved due to RFC 6143 and is limited to 8 characters. It is recommended to use complex passwords",
          "product_ids": [
            "4"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:U/RC:C",
            "version": "3.1"
          },
          "products": [
            "4"
          ]
        }
      ],
      "title": "CVE-2020-15787"
    }
  ]
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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