{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-3031",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-3031",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2021-01-13T18:10:13.174Z",
    "updatedAt": "2024-09-16T16:48:43.134Z",
    "importedAt": "2026-10-24T01:56:32.228Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "PAN-OS: Information exposure in Ethernet data frame construction (Etherleak)",
      "summary": "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.",
      "affected": [
        {
          "vendor": "Palo Alto Networks",
          "product": "PAN-OS",
          "platforms": [
            "PA-200, PA-220, PA-500, PA-800, PA-2000 Series, PA-3000 Series, PA-3200 Series, PA-5200"
          ],
          "versions": [
            {
              "version": "8.1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "8.1.18"
            },
            {
              "version": "9.0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "9.0.12"
            },
            {
              "version": "9.1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "9.1.5"
            }
          ]
        },
        {
          "vendor": "Palo Alto Networks",
          "product": "PAN-OS",
          "versions": [
            {
              "version": "10.0.*",
              "status": "unaffected"
            },
            {
              "version": "8.1.18",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "8.1*"
            },
            {
              "version": "9.0.12",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "9.0*"
            },
            {
              "version": "9.1.5",
              "status": "unaffected",
              "versionType": "custom",
              "lessThan": "9.1*"
            }
          ]
        }
      ]
    }
  }
}