ubuntu-cve-2019-20395
Vulnerability from osv_ubuntu
Published
2020-01-22 22:15
Modified
2026-04-22 07:39
Summary
Details

A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. Applications that use libyang to parse untrusted input yang files may crash.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libyang-cpp0.16",
            "binary_version": "0.16.105-3build1"
          },
          {
            "binary_name": "libyang0.16",
            "binary_version": "0.16.105-3build1"
          },
          {
            "binary_name": "python3-yang",
            "binary_version": "0.16.105-3build1"
          },
          {
            "binary_name": "yang-tools",
            "binary_version": "0.16.105-3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libyang",
        "purl": "pkg:deb/ubuntu/libyang@0.16.105-3build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.16.105-1",
        "0.16.105-2",
        "0.16.105-3",
        "0.16.105-3build1"
      ]
    }
  ],
  "aliases": [],
  "details": "A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. Applications that use libyang to parse untrusted input yang files may crash.",
  "id": "UBUNTU-CVE-2019-20395",
  "modified": "2026-04-22T07:39:14Z",
  "published": "2020-01-22T22:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-20395"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793924"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/CESNET/libyang/issues/724"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2019-20395"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2019-20395"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.