{
  "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-2019-0048",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2019-0048",
    "idYear": 2019,
    "status": "PUBLISHED",
    "publishedAt": "2019-07-11T19:40:52.200Z",
    "updatedAt": "2024-09-17T00:01:16.400Z",
    "importedAt": "2026-10-24T01:56:04.670Z",
    "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": "EX4300 Series: When a firewall filter is applied to a loopback interface, other firewall filters for multicast traffic may fail",
      "summary": "On EX4300 Series switches with TCAM optimization enabled, incoming multicast traffic matches an implicit loopback filter rule first, since it has high priority. This rule is meant for reserved multicast addresses 224.0.0.x, but incorrectly matches on 224.x.x.x. Due to this bug, when a firewall filter is applied on the loopback interface, other firewall filters might stop working for multicast traffic. The command 'show firewall filter' can be used to confirm whether the filter is working. This issue only affects the EX4300 switch. No other products or platforms are affected by this vulnerability. This issue affects: Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D51, 14.1X53-D115 on EX4300 Series; 17.1 versions prior to 17.1R3 on EX4300 Series; 17.2 versions prior to 17.2R3-S2 on EX4300 Series; 17.3 versions prior to 17.3R3-S3 on EX4300 Series; 17.4 versions prior to 17.4R2-S5, 17.4R3 on EX4300 Series; 18.1 versions prior to 18.1R3-S1 on EX4300 Series; 18.2 versions prior to 18.2R2 on EX4300 Series; 18.3 versions prior to 18.3R2 on EX4300 Series.",
      "affected": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "versions": [
            {
              "version": "14.1X53 versions prior to 14.1X53-D51 and 14.1X53-D115 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "17.1 versions prior to 17.1R3 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "17.2 versions prior to 17.2R3-S2 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "17.3 versions prior to 17.3R3-S3 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "17.4 versions prior to 17.4R2-S5 and 17.4R3 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "18.1 versions prior to 18.1R3-S1 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "18.2 versions prior to 18.2R2 on EX4300 Series",
              "status": "affected"
            },
            {
              "version": "18.3 versions prior to 18.3R2 on EX4300 Series",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}