ubuntu-cve-2019-19334
Vulnerability from osv_ubuntu
Published
2019-12-06 16:15
Modified
2025-07-16 04:55
Summary
Details

In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libyang-cpp-dev",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "libyang-cpp0.16",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "libyang-cpp0.16-dbgsym",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "libyang-dev",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "libyang0.16",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "libyang0.16-dbgsym",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "python3-yang",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "python3-yang-dbg",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "yang-tools",
            "binary_version": "0.16.105-2"
          },
          {
            "binary_name": "yang-tools-dbgsym",
            "binary_version": "0.16.105-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libyang",
        "purl": "pkg:deb/ubuntu/libyang@0.16.105-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.105-2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.16.105-1"
      ]
    }
  ],
  "aliases": [],
  "details": "In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type \"identityref\". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.",
  "id": "UBUNTU-CVE-2019-19334",
  "modified": "2025-07-16T04:55:13Z",
  "published": "2019-12-06T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-19334"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-19334"
    }
  ],
  "related": [],
  "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": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-19334"
  ],
  "withdrawn": "2025-07-18T16:45:28Z"
}



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