GSD-2021-33541

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
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.
Aliases
Aliases
CVE-2021-33541
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{
  "GSD": {
    "alias": "CVE-2021-33541",
    "description": "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.",
    "id": "GSD-2021-33541"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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      "details": "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.",
      "id": "GSD-2021-33541",
      "modified": "2023-12-13T01:23:18.210105Z",
      "schema_version": "1.4.0"
    }
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        "DATE_PUBLIC": "2021-06-23T10:00:00.000Z",
        "ID": "CVE-2021-33541",
        "STATE": "PUBLIC",
        "TITLE": "Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability"
      },
      "affects": {
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            {
              "product": {
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                          "version_name": "ILC1x0",
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                          "version_affected": "=",
                          "version_name": "ILC1x1",
                          "version_value": "all variants"
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              "vendor_name": "Phoenix Contact"
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      "credit": [
        {
          "lang": "eng",
          "value": "This vulnerability was discovered by the Industrial Control Security Laboratory of Qi An Xin Technology Group Inc. from China and reported to CERT@VDE. PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication."
        }
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          }
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          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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            "url": "https://cert.vde.com/en-us/advisories/vde-2021-019"
          }
        ]
      },
      "solution": [
        {
          "lang": "eng",
          "value": "Temporary Fix / Mitigation\n\nPhoenix 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 (https://dam-mdc.phoenixcontact.com/asset/156443151564/0a870ae433c19148b80bd760f3a1c1f2/107913_en_03.pdf)"
        }
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      "lastModifiedDate": "2021-07-02T00:11Z",
      "publishedDate": "2021-06-25T19:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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