VDE-2021-019

Vulnerability from csaf_phoenixcontactgmbhcokg - Published: 2021-06-23 12:16 - Updated: 2025-05-14 13:00
Summary
PHOENIX CONTACT: Security Advisory for ILC1x1 Industrial controllers
Notes
Summary: Phoenix Contact Classic Line industrial controllers are developed and designed for the use in closed industrial networks. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module (CWE-770).
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 the Phoenix Contact application note: Measures to protect network-capable devices with Ethernet connection
Impact: A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.
CVE-2021-33541

Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
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
References
Acknowledgments
CERT@VDE certvde.com
Industrial Control Security Laboratory of Qi An Xin Technology Group Inc.
To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      },
      {
        "organization": "Industrial Control Security Laboratory of Qi An Xin Technology Group Inc.",
        "summary": "discovered and reported"
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "summary",
        "text": "Phoenix Contact Classic Line industrial controllers are developed and designed for the use in closed industrial networks. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC\u0027s network communication module (CWE-770).",
        "title": "Summary"
      },
      {
        "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 the Phoenix Contact application note:\nMeasures to protect network-capable devices with Ethernet connection",
        "title": "Mitigation"
      },
      {
        "category": "description",
        "text": "A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.",
        "title": "Impact"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "psirt@phoenixcontact.com",
      "name": "Phoenix Contact GmbH \u0026 Co. KG",
      "namespace": "https://phoenixcontact.com/psirt"
    },
    "references": [
      {
        "category": "external",
        "summary": "PHOENIX CONTACT advisory overview at CERT@VDE",
        "url": "https://certvde.com/en/advisories/vendor/phoenixcontact/"
      },
      {
        "category": "self",
        "summary": "VDE-2021-019: PHOENIX CONTACT: Security Advisory for ILC1x1 Industrial controllers - HTML",
        "url": "https://certvde.com/en/advisories/VDE-2021-019"
      },
      {
        "category": "self",
        "summary": "VDE-2021-019: PHOENIX CONTACT: Security Advisory for ILC1x1 Industrial controllers - CSAF",
        "url": "https://phoenixcontact.csaf-tp.certvde.com/.well-known/csaf/white/2021/vde-2021-019.json"
      }
    ],
    "title": "PHOENIX CONTACT: Security Advisory for ILC1x1 Industrial controllers",
    "tracking": {
      "aliases": [
        "VDE-2021-019"
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      "current_release_date": "2025-05-14T13:00:14.000Z",
      "generator": {
        "date": "2025-02-10T08:24:01.787Z",
        "engine": {
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      "revision_history": [
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          "date": "2021-06-23T12:16:00.000Z",
          "number": "1",
          "summary": "Initial revision."
        },
        {
          "date": "2025-01-27T12:50:00.000Z",
          "number": "2",
          "summary": "update: all versions was converted to a machine-readable format"
        },
        {
          "date": "2025-02-10T09:00:00.000Z",
          "number": "3",
          "summary": "Update: Provider data has been corrected"
        },
        {
          "date": "2025-05-14T13:00:14.000Z",
          "number": "4",
          "summary": "Fix: added distribution"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
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                  "product_id": "CSAFPID-11001"
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              {
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                "category": "product_version_range",
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        "category": "vendor",
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    "product_groups": [
      {
        "group_id": "CSAFGID-0001",
        "product_ids": [
          "CSAFPID-31001",
          "CSAFPID-31002"
        ],
        "summary": "affected products."
      }
    ],
    "relationships": [
      {
        "category": "installed_on",
        "full_product_name": {
          "name": "Firmware vers:all/* installed on Hardware ILC1x0",
          "product_id": "CSAFPID-31001"
        },
        "product_reference": "CSAFPID-21001",
        "relates_to_product_reference": "CSAFPID-11001"
      },
      {
        "category": "installed_on",
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        },
        "product_reference": "CSAFPID-21001",
        "relates_to_product_reference": "CSAFPID-11002"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-33541",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "description",
          "text": "Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC\u0027s network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
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          "CSAFPID-31001",
          "CSAFPID-31002"
        ]
      },
      "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:\nMeasures to protect network-capable devices with Ethernet connection",
          "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"
          ]
        }
      ],
      "title": "CVE-2021-33541"
    }
  ]
}


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