{
  "document": {
    "title": "SSA-158827: Denial-of-Service Vulnerability in Automation License Manager",
    "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-158827",
      "status": "final",
      "version": "1",
      "revision_history": [
        {
          "number": "1",
          "legacy_version": "1.0",
          "date": "2021-08-10T00:00:00Z",
          "summary": "Publication Date"
        }
      ],
      "initial_release_date": "2021-08-10T00:00:00Z",
      "current_release_date": "2021-08-10T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      }
    },
    "notes": [
      {
        "title": "Summary",
        "category": "summary",
        "text": "A vulnerability was identified in the Automation License Manager software that could be triggered by sending specially crafted packets to port 4410/tcp of an affected system. This could cause a denial-of-service preventing legitimate users from using the system.\n\nSiemens has released an update for the Automation License Manager 6 and recommends to update to the latest version. Siemens recommends specific countermeasures for products where updates are not, or not yet 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-158827.pdf",
        "summary": "SSA-158827: Denial-of-Service Vulnerability in Automation License Manager - PDF Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-158827.txt",
        "summary": "SSA-158827: Denial-of-Service Vulnerability in Automation License Manager - TXT Version"
      },
      {
        "category": "self",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-158827.json",
        "summary": "SSA-158827: Denial-of-Service Vulnerability in Automation License Manager - CSAF Version"
      }
    ]
  },
  "product_tree": {
    "branches": [
      {
        "name": "Siemens",
        "category": "vendor",
        "branches": [
          {
            "name": "Automation License Manager 5",
            "category": "product_name",
            "branches": [
              {
                "name": "vers:all/*",
                "category": "product_version_range",
                "product": {
                  "product_id": "1",
                  "name": "Automation License Manager 5"
                }
              }
            ]
          },
          {
            "name": "Automation License Manager 6",
            "category": "product_name",
            "branches": [
              {
                "name": "< V6.0 SP9 Update 2",
                "category": "product_version_range",
                "product": {
                  "product_id": "2",
                  "name": "Automation License Manager 6"
                }
              }
            ]
          }
        ]
      }
    ]
  },
  "vulnerabilities": [
    {
      "title": "CVE-2021-25659",
      "notes": [
        {
          "title": "Summary",
          "category": "summary",
          "text": "Sending specially crafted packets to port 4410/tcp of an affected system could lead to extensive memory being consumed and as such could cause a denial-of-service preventing legitimate users from using the system."
        }
      ],
      "cve": "CVE-2021-25659",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "product_status": {
        "known_affected": [
          "1",
          "2"
        ]
      },
      "scores": [
        {
          "cvss_v3": {
            "version": "3.1",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C"
          },
          "products": [
            "1",
            "2"
          ]
        }
      ],
      "remediations": [
        {
          "product_ids": [
            "1"
          ],
          "category": "none_available",
          "details": "Currently no remediation is available"
        },
        {
          "product_ids": [
            "2"
          ],
          "category": "vendor_fix",
          "details": "Update to V6.0 SP9 Update 2 or later",
          "url": "https://support.industry.siemens.com/cs/ww/en/view/114358/"
        },
        {
          "product_ids": [
            "1",
            "2"
          ],
          "category": "mitigation",
          "details": "On the Automation License Manager settings menu disable \"Allow Remote Connections\""
        },
        {
          "product_ids": [
            "1",
            "2"
          ],
          "category": "mitigation",
          "details": "If remote connections are needed, limit remote access to port 4410/tcp to trusted systems only"
        }
      ],
      "references": [
        {
          "url": "https://support.industry.siemens.com/cs/ww/en/view/114358/",
          "summary": "CVE-2021-25659 - Automation License Manager 6"
        },
        {
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-25659.json",
          "summary": "CVE-2021-25659 Mitre 5.0 json"
        }
      ]
    }
  ]
}