FKIE_CVE-2019-20395

Vulnerability from fkie_nvd - Published: 2020-01-22 22:15 - Updated: 2024-11-21 04:38
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
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.
References
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1793924Issue Tracking, Third Party Advisory
cve@mitre.orghttps://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237Third Party Advisory
cve@mitre.orghttps://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1Third Party Advisory
cve@mitre.orghttps://github.com/CESNET/libyang/issues/724Exploit, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1793924Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/CESNET/libyang/issues/724Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html
Impacted products
Vendor Product Version
cesnet libyang 0.11
cesnet libyang 0.11
cesnet libyang 0.12
cesnet libyang 0.12
cesnet libyang 0.13
cesnet libyang 0.13
cesnet libyang 0.14
cesnet libyang 0.15
cesnet libyang 0.16
cesnet libyang 0.16
cesnet libyang 0.16
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*",
              "matchCriteriaId": "65E91322-5F67-43C2-8112-5ECAEC2A3C12",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*",
              "matchCriteriaId": "80A88DE4-93F8-40C3-AA52-A5F353F028AA",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*",
              "matchCriteriaId": "05C120CA-50EF-4B6D-92C9-ED736219DB07",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*",
              "matchCriteriaId": "99D1FA55-3F56-4E09-B41E-B05C199B96B8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*",
              "matchCriteriaId": "35D48EC4-58D2-49C6-8049-920787733587",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*",
              "matchCriteriaId": "B57F3953-49D6-413C-A4AE-03125935FC77",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*",
              "matchCriteriaId": "DD62411F-A524-4E80-B540-780EA39CB6A4",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*",
              "matchCriteriaId": "FEF091B1-978A-4881-B1FC-6848CD1A7BBF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*",
              "matchCriteriaId": "0C50D690-9A4D-4B78-BF4E-A4D9B4074216",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*",
              "matchCriteriaId": "124A5D30-7451-4516-9AA2-963AE62DD679",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*",
              "matchCriteriaId": "C260D13B-82E9-4596-9116-61073B42D661",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Un problema de consumo de pila est\u00e1 presente en libyang versiones anteriores a v1.0-r1, debido al tipo de uni\u00f3n autorreferencial que contiene leafrefs. Las aplicaciones que usan libyang para analizar archivos de entrada yang no confiables pueden bloquearse."
    }
  ],
  "id": "CVE-2019-20395",
  "lastModified": "2024-11-21T04:38:23.030",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-01-22T22:15:10.423",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793924"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/issues/724"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793924"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/issues/724"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.
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Detection rules are retrieved from Rulezet.