{
  "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-2018-0021",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2018-0021",
    "idYear": 2018,
    "status": "PUBLISHED",
    "publishedAt": "2018-04-11T19:00:00.000Z",
    "updatedAt": "2024-09-17T00:36:02.834Z",
    "importedAt": "2026-10-24T01:55:56.138Z",
    "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": "Junos OS: Short MacSec keys may allow man-in-the-middle attacks.",
      "summary": "If all 64 digits of the connectivity association name (CKN) key or all 32 digits of the connectivity association key (CAK) key are not configured, all remaining digits will be auto-configured to 0. Hence, Juniper devices configured with short MacSec keys are at risk to an increased likelihood that an attacker will discover the secret passphrases configured for these keys through dictionary-based and brute-force-based attacks using spoofed packets. Affected releases are Juniper Networks Junos OS: 14.1 versions prior to 14.1R10, 14.1R9; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R4-S9, 15.1R6-S6, 15.1R7; 15.1X49 versions prior to 15.1X49-D100; 15.1X53 versions prior to 15.1X53-D59; 16.1 versions prior to 16.1R3-S8, 16.1R4-S8, 16.1R5; 16.2 versions prior to 16.2R1-S6, 16.2R2; 17.1 versions prior to 17.1R2.",
      "affected": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "versions": [
            {
              "version": "14.1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "14.1R10, 14.1R9"
            },
            {
              "version": "14.1X53",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "14.1X53-D47"
            },
            {
              "version": "15.1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "15.1R4-S9, 15.1R6-S6, 15.1R7"
            },
            {
              "version": "15.1X49",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "15.1X49-D100"
            },
            {
              "version": "15.1X53",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "15.1X53-D59"
            },
            {
              "version": "16.1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "16.1R3-S8, 16.1R4-S8, 16.1R5"
            },
            {
              "version": "16.2",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "16.2R1-S6, 16.2R2"
            },
            {
              "version": "17.1",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "17.1R2"
            }
          ]
        }
      ]
    }
  }
}