{
  "document": {
    "title": "SSA-689942: Denial-of-Service and DLL Hijacking Vulnerabilities in Multiple SIMATIC Software Products",
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "publisher": {
      "name": "Siemens ProductCERT",
      "contact_details": "productcert@siemens.com",
      "category": "vendor",
      "namespace": "https://www.siemens.com"
    },
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "tracking": {
      "id": "SSA-689942",
      "status": "final",
      "version": "4",
      "revision_history": [
        {
          "number": "1",
          "legacy_version": "1.0",
          "date": "2020-06-09T00:00:00Z",
          "summary": "Publication Date"
        },
        {
          "number": "2",
          "legacy_version": "1.1",
          "date": "2020-07-14T00:00:00Z",
          "summary": "Added solution for SIMATIC PCS 7 V9.0"
        },
        {
          "number": "3",
          "legacy_version": "1.2",
          "date": "2020-12-08T00:00:00Z",
          "summary": "Corrected affected version and patch link for SINAMICS STARTER"
        },
        {
          "number": "4",
          "legacy_version": "1.3",
          "date": "2021-04-13T00:00:00Z",
          "summary": "Added solution for SIMATIC PDM"
        }
      ],
      "initial_release_date": "2020-06-09T00:00:00Z",
      "current_release_date": "2021-04-13T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      }
    },
    "notes": [
      {
        "title": "Summary",
        "category": "summary",
        "text": "Multiple SIMATIC Software products are affected by two vulnerabilities that could allow an attacker to manipulate project files that may lead to Remote Code Execution or Denial-of-Service attacks.\n\nSiemens has released updates to some of the affected products and recommends that customers update to the latest version. Siemens is preparing further updates and recommends specific workarounds and mitigations until patches are available."
      },
      {
        "title": "General Recommendations",
        "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' 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": "Additional Resources",
        "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": "Terms of Use",
        "category": "legal_disclaimer",
        "text": "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."
      }
    ],
    "references": [
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-689942.pdf",
        "summary": "SSA-689942: Denial-of-Service and DLL Hijacking Vulnerabilities in Multiple SIMATIC Software Products - PDF Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-689942.txt",
        "summary": "SSA-689942: Denial-of-Service and DLL Hijacking Vulnerabilities in Multiple SIMATIC Software Products - TXT Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-689942.json",
        "summary": "SSA-689942: Denial-of-Service and DLL Hijacking Vulnerabilities in Multiple SIMATIC Software Products - CSAF Version"
      }
    ],
    "acknowledgments": [
      {
        "names": [
          "Uri Katz"
        ],
        "organization": "Claroty",
        "summary": "coordinated disclosure"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "name": "Siemens",
        "category": "vendor",
        "branches": [
          {
            "name": "SIMATIC PCS 7 V8.2 and earlier",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "1",
                  "name": "SIMATIC PCS 7 V8.2 and earlier"
                }
              }
            ]
          },
          {
            "name": "SIMATIC PCS 7 V9.0",
            "category": "product_name",
            "branches": [
              {
                "name": "< V9.0 SP3",
                "category": "product_version_range",
                "product": {
                  "product_id": "2",
                  "name": "SIMATIC PCS 7 V9.0"
                }
              }
            ]
          },
          {
            "name": "SIMATIC PDM",
            "category": "product_name",
            "branches": [
              {
                "name": "< V9.2",
                "category": "product_version_range",
                "product": {
                  "product_id": "3",
                  "name": "SIMATIC PDM"
                }
              }
            ]
          },
          {
            "name": "SIMATIC STEP 7 V5.X",
            "category": "product_name",
            "branches": [
              {
                "name": "< V5.6 SP2 HF3",
                "category": "product_version_range",
                "product": {
                  "product_id": "4",
                  "name": "SIMATIC STEP 7 V5.X"
                }
              }
            ]
          },
          {
            "name": "SINAMICS STARTER (containing STEP 7 OEM version)",
            "category": "product_name",
            "branches": [
              {
                "name": "< V5.4 HF2",
                "category": "product_version_range",
                "product": {
                  "product_id": "5",
                  "name": "SINAMICS STARTER (containing STEP 7 OEM version)"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "title": "CVE-2020-7585",
      "notes": [
        {
          "title": "Summary",
          "category": "summary",
          "text": "A DLL Hijacking vulnerability could allow a local attacker to execute code with elevated privileges.\n\nThe security vulnerability could be exploited by an attacker with local access to the affected systems. Successful exploitation requires user privileges but no user interaction. The vulnerability could allow an attacker to compromise the availability of the system as well as to have access to confidential information."
        }
      ],
      "cve": "CVE-2020-7585",
      "cwe": {
        "id": "CWE-427",
        "name": "Uncontrolled Search Path Element"
      },
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "remediations": [
        {
          "product_ids": [
            "1"
          ],
          "category": "vendor_fix",
          "details": "See recommendations from section Workarounds and Mitigations or upgrade to a newer SIMATIC PCS 7 version"
        },
        {
          "product_ids": [
            "2"
          ],
          "category": "vendor_fix",
          "details": "Update to V9.0 SP3 or later version"
        },
        {
          "product_ids": [
            "3"
          ],
          "category": "vendor_fix",
          "details": "Update to V9.2 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109794361/"
        },
        {
          "product_ids": [
            "4"
          ],
          "category": "vendor_fix",
          "details": "Update to V5.6 SP2 HF3 or later version",
          "url": "https://support.industry.siemens.com/cs/de/en/view/109779992/"
        },
        {
          "product_ids": [
            "5"
          ],
          "category": "vendor_fix",
          "details": "Update to V5.4 HF2 or later version",
          "url": "https://support.industry.siemens.com/cs/us/en/view/109782792/"
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ],
          "category": "mitigation",
          "details": "Restrict access to project files on the engineering station to trusted users."
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ],
          "category": "mitigation",
          "details": "Only use project files from trusted sources."
        }
      ],
      "references": [
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109794361/",
          "summary": "CVE-2020-7585 - SIMATIC PDM"
        },
        {
          "url": "https://support.industry.siemens.com/cs/de/en/view/109779992/",
          "summary": "CVE-2020-7585 - SIMATIC STEP 7 V5.X"
        },
        {
          "url": "https://support.industry.siemens.com/cs/us/en/view/109782792/",
          "summary": "CVE-2020-7585 - SINAMICS STARTER (containing STEP 7 OEM version)"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-7585.json",
          "summary": "CVE-2020-7585 Mitre 5.0 json"
        }
      ]
    },
    {
      "title": "CVE-2020-7586",
      "notes": [
        {
          "title": "Summary",
          "category": "summary",
          "text": "A buffer overflow vulnerability could allow a local attacker to cause a Denial-of-Service situation.\n\nThe security vulnerability could be exploited by an attacker with local access to the affected systems. Successful exploitation requires user privileges but no user interaction. The vulnerability could allow an attacker to compromise the availability of the system as well as to have access to confidential information."
        }
      ],
      "cve": "CVE-2020-7586",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "remediations": [
        {
          "product_ids": [
            "1"
          ],
          "category": "vendor_fix",
          "details": "See recommendations from section Workarounds and Mitigations or upgrade to a newer SIMATIC PCS 7 version"
        },
        {
          "product_ids": [
            "2"
          ],
          "category": "vendor_fix",
          "details": "Update to V9.0 SP3 or later version"
        },
        {
          "product_ids": [
            "3"
          ],
          "category": "vendor_fix",
          "details": "Update to V9.2 or later version",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109794361/"
        },
        {
          "product_ids": [
            "4"
          ],
          "category": "vendor_fix",
          "details": "Update to V5.6 SP2 HF3 or later version",
          "url": "https://support.industry.siemens.com/cs/de/en/view/109779992/"
        },
        {
          "product_ids": [
            "5"
          ],
          "category": "vendor_fix",
          "details": "Update to V5.4 HF2 or later version",
          "url": "https://support.industry.siemens.com/cs/us/en/view/109782792/"
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ],
          "category": "mitigation",
          "details": "Restrict access to project files on the engineering station to trusted users."
        },
        {
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ],
          "category": "mitigation",
          "details": "Only use project files from trusted sources."
        }
      ],
      "references": [
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109794361/",
          "summary": "CVE-2020-7586 - SIMATIC PDM"
        },
        {
          "url": "https://support.industry.siemens.com/cs/de/en/view/109779992/",
          "summary": "CVE-2020-7586 - SIMATIC STEP 7 V5.X"
        },
        {
          "url": "https://support.industry.siemens.com/cs/us/en/view/109782792/",
          "summary": "CVE-2020-7586 - SINAMICS STARTER (containing STEP 7 OEM version)"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-7586.json",
          "summary": "CVE-2020-7586 Mitre 5.0 json"
        }
      ]
    }
  ]
}