ssa-705111
Vulnerability from csaf_siemens
Published
2021-04-13 00:00
Modified
2022-01-11 00:00
Summary
SSA-705111: Multiple Vulnerabilities (NAME:WRECK) in the DNS Module of Nucleus RTOS

Notes

Summary
Security researchers discovered and disclosed 9 vulnerabilities in several DNS implementations, also known as “NAME:WRECK” vulnerabilities. The vulnerabilities described in this advisory are from this set. The DNS client of affected products contains multiple vulnerabilities related to the handling of DNS responses and requests. The most severe could allow an attacker to manipulate the DNS responses and cause a denial-of-service condition. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not available.
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": [
          "Daniel dos Santos"
        ],
        "organization": "Forescout Technologies",
        "summary": "coordinated disclosure"
      }
    ],
    "category": "Siemens Security Advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Disclosure is not limited.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "notes": [
      {
        "category": "summary",
        "text": "Security researchers discovered and disclosed 9 vulnerabilities in several DNS implementations, also known as \u201cNAME:WRECK\u201d vulnerabilities. The vulnerabilities described in this advisory are from this set.\n\nThe DNS client of affected products contains multiple vulnerabilities related to the handling of DNS responses and requests. The most severe could allow an attacker to manipulate the DNS responses and cause a denial-of-service condition.\n\nSiemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not available.",
        "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",
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      "name": "Siemens ProductCERT",
      "namespace": "https://www.siemens.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "SSA-705111: Multiple Vulnerabilities (NAME:WRECK) in the DNS Module of Nucleus RTOS - PDF Version",
        "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf"
      },
      {
        "category": "self",
        "summary": "SSA-705111: Multiple Vulnerabilities (NAME:WRECK) in the DNS Module of Nucleus RTOS - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/ssa-705111.txt"
      },
      {
        "category": "self",
        "summary": "SSA-705111: Multiple Vulnerabilities (NAME:WRECK) in the DNS Module of Nucleus RTOS - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-705111.json"
      }
    ],
    "title": "SSA-705111: Multiple Vulnerabilities (NAME:WRECK) in the DNS Module of Nucleus RTOS",
    "tracking": {
      "current_release_date": "2022-01-11T00:00:00Z",
      "generator": {
        "engine": {
          "name": "Siemens ProductCERT CSAF Generator",
          "version": "1"
        }
      },
      "id": "SSA-705111",
      "initial_release_date": "2021-04-13T00:00:00Z",
      "revision_history": [
        {
          "date": "2021-04-13T00:00:00Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2021-11-09T00:00:00Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added solution for CVE-2021-25677 in Nucleus ReadyStart V3; consolidated list of products"
        },
        {
          "date": "2022-01-11T00:00:00Z",
          "legacy_version": "1.2",
          "number": "3",
          "summary": "Removed CAPITAL VSTAR as not affected"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
                "product": {
                  "name": "Nucleus NET",
                  "product_id": "1"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus NET"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2017.02.3",
                "product": {
                  "name": "Nucleus ReadyStart V3",
                  "product_id": "2"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus ReadyStart V3"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V2017.02.4",
                "product": {
                  "name": "Nucleus ReadyStart V3",
                  "product_id": "3"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus ReadyStart V3"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V4.1.0",
                "product": {
                  "name": "Nucleus ReadyStart V4",
                  "product_id": "4"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus ReadyStart V4"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Versions including affected DNS modules",
                "product": {
                  "name": "Nucleus Source Code",
                  "product_id": "5"
                }
              }
            ],
            "category": "product_name",
            "name": "Nucleus Source Code"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-27736",
      "cwe": {
        "id": "CWE-170",
        "name": "Improper Null Termination"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The DNS domain name label parsing functionality does not properly validate the null-terminated name in DNS-responses. The parsing of malformed responses could result in a read past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition or leak the read memory.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-27736 - Nucleus ReadyStart V3",
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "summary": "CVE-2020-27736 - Nucleus ReadyStart V4",
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "summary": "CVE-2020-27736 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-27736.json"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Update to the latest version of Nucleus ReadyStart V3 or V4",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "mitigation",
          "details": "Contact customer support or your local Nucleus Sales team for mitigation advice",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no remediation is planned",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2017.02.3 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.1.0 or later version",
          "product_ids": [
            "4"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "category": "vendor_fix",
          "details": "Contact customer support to receive patch and update information",
          "product_ids": [
            "5"
          ]
        },
        {
          "category": "mitigation",
          "details": "Avoid using DNS client of affected versions",
          "product_ids": [
            "1",
            "2",
            "4",
            "5"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "4",
            "5"
          ]
        }
      ],
      "title": "CVE-2020-27736"
    },
    {
      "cve": "CVE-2020-27737",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The DNS response parsing functionality does not properly validate various length and counts of the records. The parsing of malformed responses could result in a read past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition or leak the memory past the allocated structure.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-27737 - Nucleus ReadyStart V3",
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "summary": "CVE-2020-27737 - Nucleus ReadyStart V4",
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "summary": "CVE-2020-27737 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-27737.json"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Update to the latest version of Nucleus ReadyStart V3 or V4",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "mitigation",
          "details": "Contact customer support or your local Nucleus Sales team for mitigation advice",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no remediation is planned",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2017.02.3 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.1.0 or later version",
          "product_ids": [
            "4"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "category": "vendor_fix",
          "details": "Contact customer support to receive patch and update information",
          "product_ids": [
            "5"
          ]
        },
        {
          "category": "mitigation",
          "details": "Avoid using DNS client of affected versions",
          "product_ids": [
            "1",
            "2",
            "4",
            "5"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "4",
            "5"
          ]
        }
      ],
      "title": "CVE-2020-27737"
    },
    {
      "cve": "CVE-2020-27738",
      "cwe": {
        "id": "CWE-788",
        "name": "Access of Memory Location After End of Buffer"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The DNS domain name record decompression functionality does not properly validate the pointer offset values. The parsing of malformed responses could result in a read access past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to cause a denial-of-service condition.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "summary": "CVE-2020-27738 - Nucleus ReadyStart V3",
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "summary": "CVE-2020-27738 - Nucleus ReadyStart V4",
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "summary": "CVE-2020-27738 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2020-27738.json"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Update to the latest version of Nucleus ReadyStart V3 or V4",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "mitigation",
          "details": "Contact customer support or your local Nucleus Sales team for mitigation advice",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no remediation is planned",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2017.02.3 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.1.0 or later version",
          "product_ids": [
            "4"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "category": "vendor_fix",
          "details": "Contact customer support to receive patch and update information",
          "product_ids": [
            "5"
          ]
        },
        {
          "category": "mitigation",
          "details": "Avoid using DNS client of affected versions",
          "product_ids": [
            "1",
            "2",
            "4",
            "5"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "4",
            "5"
          ]
        }
      ],
      "title": "CVE-2020-27738"
    },
    {
      "cve": "CVE-2021-25677",
      "cwe": {
        "id": "CWE-330",
        "name": "Use of Insufficiently Random Values"
      },
      "notes": [
        {
          "category": "summary",
          "text": "The DNS client does not properly randomize DNS transaction IDs. That could allow an attacker to poison the DNS cache or spoof DNS resolving.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "1",
          "2",
          "3",
          "4",
          "5"
        ]
      },
      "references": [
        {
          "summary": "CVE-2021-25677 - Nucleus ReadyStart V3",
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "summary": "CVE-2021-25677 - Nucleus ReadyStart V3",
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "summary": "CVE-2021-25677 - Nucleus ReadyStart V4",
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "summary": "CVE-2021-25677 Mitre 5.0 json",
          "url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-25677.json"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Update to the latest version of Nucleus ReadyStart V3 or V4",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "mitigation",
          "details": "Contact customer support or your local Nucleus Sales team for mitigation advice",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no remediation is planned",
          "product_ids": [
            "1"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2017.02.3 or later version",
          "product_ids": [
            "2"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V2017.02.4 or later version",
          "product_ids": [
            "3"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1009925838/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.1.0 or later version",
          "product_ids": [
            "4"
          ],
          "url": "https://support.sw.siemens.com/en-US/product/1336134128/"
        },
        {
          "category": "vendor_fix",
          "details": "Contact customer support to receive patch and update information",
          "product_ids": [
            "5"
          ]
        },
        {
          "category": "mitigation",
          "details": "Avoid using DNS client of affected versions",
          "product_ids": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "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:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4",
            "5"
          ]
        }
      ],
      "title": "CVE-2021-25677"
    }
  ]
}


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