{
  "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-2019-0053",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2019-0053",
    "idYear": 2019,
    "status": "PUBLISHED",
    "publishedAt": "2019-07-11T19:40:52.382Z",
    "updatedAt": "2024-09-16T19:15:29.698Z",
    "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": "Junos OS: Insufficient validation of environment variables in telnet client may lead to stack-based buffer overflow",
      "summary": "Insufficient validation of environment variables in the telnet client supplied in Junos OS can lead to stack-based buffer overflows, which can be exploited to bypass veriexec restrictions on Junos OS. A stack-based overflow is present in the handling of environment variables when connecting via the telnet client to remote telnet servers. This issue only affects the telnet client — accessible from the CLI or shell — in Junos OS. Inbound telnet services are not affected by this issue. This issue affects: Juniper Networks Junos OS: 12.3 versions prior to 12.3R12-S13; 12.3X48 versions prior to 12.3X48-D80; 14.1X53 versions prior to 14.1X53-D130, 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D170; 15.1X53 versions prior to 15.1X53-D237, 15.1X53-D496, 15.1X53-D591, 15.1X53-D69; 16.1 versions prior to 16.1R3-S11, 16.1R7-S4; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R2-S7, 17.2R3-S1; 17.3 versions prior to 17.3R3-S4; 17.4 versions prior to 17.4R1-S6, 17.4R2-S3, 17.4R3; 18.1 versions prior to 18.1R2-S4, 18.1R3-S3; 18.2 versions prior to 18.2R1-S5, 18.2R2-S2, 18.2R3; 18.2X75 versions prior to 18.2X75-D40; 18.3 versions prior to 18.3R1-S3, 18.3R2; 18.4 versions prior to 18.4R1-S2, 18.4R2.",
      "affected": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS",
          "versions": [
            {
              "version": "12.3 versions prior to 12.3R12-S13",
              "status": "affected"
            },
            {
              "version": "12.3X48 versions prior to 12.3X48-D80",
              "status": "affected"
            },
            {
              "version": "14.1X53 versions prior to 14.1X53-D130 and 14.1X53-D49",
              "status": "affected"
            },
            {
              "version": "15.1 versions prior to 15.1F6-S12 and15.1R7-S4",
              "status": "affected"
            },
            {
              "version": "15.1X49 versions prior to 15.1X49-D170",
              "status": "affected"
            },
            {
              "version": "15.1X53 versions prior to 15.1X53-D237 and 15.1X53-D496 and 15.1X53-D591 and 15.1X53-D69",
              "status": "affected"
            },
            {
              "version": "16.1 versions prior to 16.1R3-S11 and 16.1R7-S4",
              "status": "affected"
            },
            {
              "version": "16.2 versions prior to 16.2R2-S9",
              "status": "affected"
            },
            {
              "version": "17.1 versions prior to 17.1R3",
              "status": "affected"
            },
            {
              "version": "17.2 versions prior to 17.2R1-S8 and 17.2R2-S7 and 17.2R3-S1",
              "status": "affected"
            },
            {
              "version": "17.3 versions prior to 17.3R3-S4",
              "status": "affected"
            },
            {
              "version": "17.4 versions prior to 17.4R1-S6 and 17.4R2-S3 and 17.4R3",
              "status": "affected"
            },
            {
              "version": "18.1 versions prior to 18.1R2-S4 and 18.1R3-S3",
              "status": "affected"
            },
            {
              "version": "18.2 versions prior to 18.2R1-S5 and 18.2R2-S2 and 18.2R3",
              "status": "affected"
            },
            {
              "version": "18.2X75 versions prior to 18.2X75-D40",
              "status": "affected"
            },
            {
              "version": "18.3 versions prior to 18.3R1-S3 and 18.3R2",
              "status": "affected"
            },
            {
              "version": "18.4 versions prior to 18.4R1-S2 and 18.4R2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  }
}