ubuntu-cve-2019-18224
Vulnerability from osv_ubuntu
Published
2019-10-21 17:15
Modified
2026-04-22 07:39
Summary
Details

idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn2",
            "binary_version": "0.9-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libidn2-0",
            "binary_version": "0.9-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "libidn2-0",
        "purl": "pkg:deb/ubuntu/libidn2-0@0.9-1ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9-1",
        "0.9-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "idn2",
            "binary_version": "0.10-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "libidn2-0",
            "binary_version": "0.10-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libidn2-0",
        "purl": "pkg:deb/ubuntu/libidn2-0@0.10-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10-3",
        "0.10-3ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "idn2",
            "binary_version": "2.0.4-1.1ubuntu0.2"
          },
          {
            "binary_name": "libidn2-0",
            "binary_version": "2.0.4-1.1ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libidn2",
        "purl": "pkg:deb/ubuntu/libidn2@2.0.4-1.1ubuntu0.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.4-1.1ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.4-1",
        "2.0.4-1.1",
        "2.0.4-1.1build2"
      ]
    }
  ],
  "aliases": [],
  "details": "idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string.",
  "id": "UBUNTU-CVE-2019-18224",
  "modified": "2026-04-22T07:39:07Z",
  "published": "2019-10-21T17:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-18224"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12420"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libidn/libidn2/commit/e4d1558aa2c1c04a05066ee8600f37603890ba8c"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/libidn/libidn2/compare/libidn2-2.1.0...libidn2-2.1.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4168-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-18224"
    }
  ],
  "related": [
    "USN-4168-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-18224"
  ]
}



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