{
  "GSD": {
    "alias": "CVE-2021-3031",
    "description": "Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls are not cleared before the data frame is created. This leaks a small amount of random information from the firewall memory into the Ethernet packets. An attacker on the same Ethernet subnet as the PAN-OS firewall is able to collect potentially sensitive information from these packets. This issue is also known as Etherleak and is detected by security scanners as CVE-2003-0001. This issue impacts: PAN-OS 8.1 version earlier than PAN-OS 8.1.18; PAN-OS 9.0 versions earlier than PAN-OS 9.0.12; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5.",
    "id": "GSD-2021-3031"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-3031"
      ],
      "details": "Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls are not cleared before the data frame is created. This leaks a small amount of random information from the firewall memory into the Ethernet packets. An attacker on the same Ethernet subnet as the PAN-OS firewall is able to collect potentially sensitive information from these packets. This issue is also known as Etherleak and is detected by security scanners as CVE-2003-0001. This issue impacts: PAN-OS 8.1 version earlier than PAN-OS 8.1.18; PAN-OS 9.0 versions earlier than PAN-OS 9.0.12; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5.",
      "id": "GSD-2021-3031",
      "modified": "2023-12-13T01:23:35.278846Z",
      "schema_version": "1.4.0"
    }
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        "ASSIGNER": "psirt@paloaltonetworks.com",
        "DATE_PUBLIC": "2021-01-13T17:00:00.000Z",
        "ID": "CVE-2021-3031",
        "STATE": "PUBLIC",
        "TITLE": "PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)"
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        "vendor": {
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                    "product_name": "PAN-OS",
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                          "version_affected": "\u003c",
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                        {
                          "platform": "PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200",
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                        {
                          "platform": "PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200",
                          "version_affected": "\u003c",
                          "version_name": "9.1",
                          "version_value": "9.1.5"
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                        {
                          "version_affected": "!\u003e=",
                          "version_name": "8.1",
                          "version_value": "8.1.18"
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                        {
                          "version_affected": "!\u003e=",
                          "version_name": "9.0",
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                        {
                          "version_affected": "!",
                          "version_name": "10.0",
                          "version_value": "10.0.*"
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                ]
              },
              "vendor_name": "Palo Alto Networks"
            }
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      },
      "credit": [
        {
          "lang": "eng",
          "value": "This issue was found by a customer of Palo Alto Networks during a security review."
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      ],
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      "data_type": "CVE",
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            "lang": "eng",
            "value": "Padding bytes in Ethernet packets on PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200 Series, and PA-7000 Series firewalls are not cleared before the data frame is created. This leaks a small amount of random information from the firewall memory into the Ethernet packets. An attacker on the same Ethernet subnet as the PAN-OS firewall is able to collect potentially sensitive information from these packets. This issue is also known as Etherleak and is detected by security scanners as CVE-2003-0001. This issue impacts: PAN-OS 8.1 version earlier than PAN-OS 8.1.18; PAN-OS 9.0 versions earlier than PAN-OS 9.0.12; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5."
          }
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      },
      "exploit": [
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          "lang": "eng",
          "value": "Palo Alto Networks is not aware of any malicious exploitation of this issue."
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      "generator": {
        "engine": "Vulnogram 0.0.9"
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      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
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      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-200 Information Exposure"
              }
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      "references": {
        "reference_data": [
          {
            "name": "https://security.paloaltonetworks.com/CVE-2021-3031",
            "refsource": "MISC",
            "url": "https://security.paloaltonetworks.com/CVE-2021-3031"
          }
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      "solution": [
        {
          "lang": "eng",
          "value": "This issue is fixed in PAN-OS 8.1.18, PAN-OS 9.0.12, PAN-OS 9.1.5, and all later PAN-OS versions."
        }
      ],
      "source": {
        "defect": [
          "PAN-124681"
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        "discovery": "USER"
      },
      "timeline": [
        {
          "lang": "eng",
          "time": "2021-01-13T17:00:00.000Z",
          "value": "Initial publication"
        }
      ],
      "work_around": [
        {
          "lang": "eng",
          "value": "There is no workaround to prevent the information leak in the Ethernet packets; however, restricting access to the networks mitigates the risk of this issue."
        }
      ],
      "x_advisoryEoL": false,
      "x_affectedList": [
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        "PAN-OS 9.1.3",
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      "lastModifiedDate": "2022-10-27T12:51Z",
      "publishedDate": "2021-01-13T18:15Z"
    }
  }
}