SSA-501673

Vulnerability from csaf_siemens - Published: 2021-12-19 00:00 - Updated: 2021-12-19 00:00
Summary
SSA-501673: Apache Log4j Denial of Service Vulnerability (CVE-2021-45105) - Impact to Siemens Products

Notes

Summary
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 contain a vulnerability (CVE-2021-45105) that could allow attackers to cause a denial of service condition in affected applications [1]. This advisory informs about the impact of CVE-2021-45105 to Siemens products and the corresponding remediation and mitigation measures. The vulnerability is different from the JNDI lookup vulnerabilities, the impact of which is documented in SSA-661247 [2]. Currently, no products vulnerable to CVE-2021-45105 have been identified. Siemens is investigating to determine which products are affected and is continuously updating this advisory as more information becomes available. See section Additional Information for more details regarding the investigation status. [1] https://logging.apache.org/log4j/2.x/security.html [2] https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf
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": {
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "Apache Log4j2 versions 2.0-alpha1 through 2.16.0 contain a vulnerability (CVE-2021-45105) that could allow attackers to cause a denial of service condition in affected applications [1].\n\nThis advisory informs about the impact of CVE-2021-45105 to Siemens products and the corresponding remediation and mitigation measures. The vulnerability is different from the JNDI lookup vulnerabilities, the impact of which is documented in SSA-661247 [2].\n\nCurrently, no products vulnerable to CVE-2021-45105 have been identified.\n\nSiemens is investigating to determine which products are affected and is continuously updating this advisory as more information becomes available. See section Additional Information for more details regarding the investigation status.\n\n[1] https://logging.apache.org/log4j/2.x/security.html\n\n[2] https://cert-portal.siemens.com/productcert/pdf/ssa-661247.pdf",
        "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-501673: Apache Log4j Denial of Service Vulnerability (CVE-2021-45105) - Impact to Siemens Products - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-501673: Apache Log4j Denial of Service Vulnerability (CVE-2021-45105) - Impact to Siemens Products - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-501673.txt"
      },
      {
        "category": "self",
        "summary": "SSA-501673: Apache Log4j Denial of Service Vulnerability (CVE-2021-45105) - Impact to Siemens Products - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-501673.json"
      }
    ],
    "title": "SSA-501673: Apache Log4j Denial of Service Vulnerability (CVE-2021-45105) - Impact to Siemens Products",
    "tracking": {
      "current_release_date": "2021-12-19T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-501673",
      "initial_release_date": "2021-12-19T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-12-19T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        }
      ],
      "status": "interim",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "No versions",
                "product": {
                  "name": "No product currently identified as affected",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "No product currently identified as affected"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-45105",
      "cwe": {
        "id": "CWE-674",
        "name": "Uncontrolled Recursion"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Apache Log4j2 versions 2.0-alpha1 through 2.16.0 did not protect from uncontrolled recursion from self-referential lookups, when the logging configuration uses a non-default Pattern Layout with a Context Lookup (for example, $${ctx:loginId}).\n\nThis could allow attackers with control over Thread Context Map (MDC) input data to craft malicious input data that contains a recursive lookup, resulting in a denial of service condition.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1"
        ]
      },
      "references": [
        {
          "summary": "CVE-2021-45105 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-45105.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "The table will be updated in case vulnerable products become known.",
          "product_ids": [
            "1"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "title": "CVE-2021-45105"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.