VDE-2021-029

Vulnerability from csaf_phoenixcontactgmbhcokg - Published: 2021-08-04 07:58 - Updated: 2025-05-14 12:28
Summary
PHOENIX CONTACT: DoS for PLCnext Control devices in versions <2021.0.5 LTS
Notes
Summary: A device on the same network as the controller sending a special crafted JSON request to the /auth/access-token endpoint may cause the controller to restart (CWE-20). UPDATE A The CVSS score has been raised from 7.7 (CVSS:3.0:AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H) to 9.1 (CVSS:3.0:AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)
Impact: An attacker could potentially script this request and create a denial of service attack condition.
Mitigation: Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection
Remediation: Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0.5 LTS or higher which fixes this vulnerability. | Article no | Article | |------------|--------------------------------| | 1151412 | AXC F 1152 | | 2404267 | AXC F 2152 | | 1069208 | AXC F 3152 | | 1051328 | RFC 4072S | | 1046568 | AXC F 2152 Starterkit | | 1188165 | PLCnext Technology Starterkit |
CVE-2021-34570
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-20 - Improper Input Validation
Mitigation Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection
Vendor Fix Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0.5 LTS or higher which fixes this vulnerability. | Article no | Article | |------------|--------------------------------| | 1151412 | AXC F 1152 | | 2404267 | AXC F 2152 | | 1069208 | AXC F 3152 | | 1051328 | RFC 4072S | | 1046568 | AXC F 2152 Starterkit | | 1188165 | PLCnext Technology Starterkit |
References
Acknowledgments
CERT@VDE certvde.com
Dionach Oliver Carrigan www.nozominetworks.com
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      },
      {
        "names": [
          "Oliver Carrigan"
        ],
        "organization": "Dionach",
        "summary": "discovered",
        "urls": [
          "https://www.nozominetworks.com"
        ]
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/v1/"
      }
    },
    "lang": "en-GB",
    "notes": [
      {
        "category": "summary",
        "text": "A device on the same network as the controller sending a special crafted JSON request to the /auth/access-token endpoint may cause the controller to restart (CWE-20).\n\nUPDATE A\n\nThe CVSS score has been raised from 7.7 (CVSS:3.0:AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H) to 9.1 (CVSS:3.0:AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "An attacker could potentially script this request and create a denial of service attack condition.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection",
        "title": "Mitigation"
      },
      {
        "category": "description",
        "text": "Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0.5 LTS or higher which fixes this vulnerability.\n\n| Article no | Article                        |\n|------------|--------------------------------|\n| 1151412    | AXC F 1152                    |\n| 2404267    | AXC F 2152                    |\n| 1069208    | AXC F 3152                    |\n| 1051328    | RFC 4072S                     |\n| 1046568    | AXC F 2152 Starterkit         |\n| 1188165    | PLCnext Technology Starterkit |\n",
        "title": "Remediation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@phoenixcontact.com",
      "name": "Phoenix Contact GmbH \u0026 Co. KG",
      "namespace": "https://phoenixcontact.com/psirt"
    },
    "references": [
      {
        "category": "self",
        "summary": "VDE-2021-029: PHOENIX CONTACT: DoS for PLCnext Control devices in versions \u003c2021.0.5 LTS - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2021-029"
      },
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for PHOENIX CONTACT",
        "url": "https://certvde.com/de/advisories/vendor/phoenixcontact/"
      },
      {
        "category": "self",
        "summary": "VDE-2021-029: PHOENIX CONTACT: DoS for PLCnext Control devices in versions \u003c2021.0.5 LTS - CSAF",
        "url": "https://phoenixcontact.csaf-tp.certvde.com/.well-known/csaf/white/2021/vde-2021-029.json"
      }
    ],
    "title": "PHOENIX CONTACT: DoS for PLCnext Control devices in versions \u003c2021.0.5 LTS",
    "tracking": {
      "aliases": [
        "VDE-2021-029"
      ],
      "current_release_date": "2025-05-14T12:28:19.000Z",
      "generator": {
        "date": "2025-02-10T09:26:16.859Z",
        "engine": {
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          "version": "2.5.18"
        }
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      "id": "VDE-2021-029",
      "initial_release_date": "2021-08-04T07:58:00.000Z",
      "revision_history": [
        {
          "date": "2021-08-04T07:58:00.000Z",
          "number": "1",
          "summary": "initial revision"
        },
        {
          "date": "2021-11-09T12:49:00.000Z",
          "number": "2",
          "summary": "Update A"
        },
        {
          "date": "2025-02-10T09:30:00.000Z",
          "number": "3",
          "summary": "Update: Provider data has been corrected"
        },
        {
          "date": "2025-05-14T12:28:19.000Z",
          "number": "4",
          "summary": "Fix: version space"
        }
      ],
      "status": "final",
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  },
  "product_tree": {
    "branches": [
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                  "product_id": "CSAFPID-11001",
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              },
              {
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              },
              {
                "category": "product_name",
                "name": "PLCnext Technology Starterkit",
                "product": {
                  "name": "PLCnext Technology Starterkit",
                  "product_id": "CSAFPID-11005",
                  "product_identification_helper": {
                    "model_numbers": [
                      "1188165"
                    ]
                  }
                }
              },
              {
                "category": "product_name",
                "name": "RFC 4072S",
                "product": {
                  "name": "RFC 4072S",
                  "product_id": "CSAFPID-11006",
                  "product_identification_helper": {
                    "model_numbers": [
                      "1051328"
                    ]
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Hardware"
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          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2021.0.5 LTS",
                "product": {
                  "name": "Firmware \u003c2021.0.5 LTS",
                  "product_id": "CSAFPID-21001"
                }
              },
              {
                "category": "product_version",
                "name": "2021.0.5 LTS",
                "product": {
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        "category": "vendor",
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    "product_groups": [
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        "group_id": "CSAFGID-0001",
        "product_ids": [
          "CSAFPID-31001",
          "CSAFPID-31002",
          "CSAFPID-31003",
          "CSAFPID-31004",
          "CSAFPID-31005",
          "CSAFPID-31006"
        ],
        "summary": "Affected products."
      },
      {
        "group_id": "CSAFGID-0002",
        "product_ids": [
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          "CSAFPID-32002",
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          "CSAFPID-32005",
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        ],
        "summary": "Fixed products"
      }
    ],
    "relationships": [
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      },
      {
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        },
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        "relates_to_product_reference": "CSAFPID-11002"
      },
      {
        "category": "installed_on",
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          "product_id": "CSAFPID-31003"
        },
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      },
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      },
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      },
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      },
      {
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        "relates_to_product_reference": "CSAFPID-11002"
      },
      {
        "category": "installed_on",
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        "relates_to_product_reference": "CSAFPID-11004"
      },
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware 2021.0.5 LTS installed on RFC 4072S",
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      },
      {
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      },
      {
        "category": "installed_on",
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        },
        "product_reference": "CSAFPID-22001",
        "relates_to_product_reference": "CSAFPID-11005"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-34570",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Multiple Phoenix Contact PLCnext control devices in versions prior to 2021.0.5 LTS are prone to a DoS attack through special crafted JSON requests.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-32001",
          "CSAFPID-32002",
          "CSAFPID-32003",
          "CSAFPID-32004",
          "CSAFPID-32005",
          "CSAFPID-32006"
        ],
        "known_affected": [
          "CSAFPID-31001",
          "CSAFPID-31002",
          "CSAFPID-31003",
          "CSAFPID-31004",
          "CSAFPID-31005",
          "CSAFPID-31006"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Phoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to our application note: Measures to protect network-capable devices with Ethernet connection",
          "group_ids": [
            "CSAFGID-0001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Phoenix Contact recommends affected users to upgrade to the current Firmware 2021.0.5 LTS or higher which fixes this vulnerability.\n\n| Article no | Article                        |\n|------------|--------------------------------|\n| 1151412    | AXC F 1152                    |\n| 2404267    | AXC F 2152                    |\n| 1069208    | AXC F 3152                    |\n| 1051328    | RFC 4072S                     |\n| 1046568    | AXC F 2152 Starterkit         |\n| 1188165    | PLCnext Technology Starterkit |",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalScore": 7.5,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-31001",
            "CSAFPID-31002",
            "CSAFPID-31003",
            "CSAFPID-31004",
            "CSAFPID-31005",
            "CSAFPID-31006"
          ]
        }
      ],
      "title": "CVE-2021-34570"
    }
  ]
}


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Sightings

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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 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.



Detection rules are retrieved from Rulezet.