FKIE_CVE-2019-20398

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 NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
References
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1793935Issue Tracking, Patch, Third Party Advisory
cve@mitre.orghttps://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08Patch
cve@mitre.orghttps://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3Third Party Advisory
cve@mitre.orghttps://github.com/CESNET/libyang/issues/773Exploit, 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=1793935Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/CESNET/libyang/issues/773Exploit, 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
cesnet libyang 1.0
cesnet libyang 1.0
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*",
              "matchCriteriaId": "65E91322-5F67-43C2-8112-5ECAEC2A3C12",
              "vulnerable": true
            },
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              "matchCriteriaId": "80A88DE4-93F8-40C3-AA52-A5F353F028AA",
              "vulnerable": true
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              "matchCriteriaId": "05C120CA-50EF-4B6D-92C9-ED736219DB07",
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              "matchCriteriaId": "B57F3953-49D6-413C-A4AE-03125935FC77",
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            },
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              "matchCriteriaId": "DD62411F-A524-4E80-B540-780EA39CB6A4",
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          "negate": false,
          "operator": "OR"
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash."
    },
    {
      "lang": "es",
      "value": "Una desreferencia del puntero NULL est\u00e1 presente en libyang versiones anteriores a v1.0-r3, en la funci\u00f3n lys_extension_instances_free() debido a una copia de extensiones no resuelta en la funci\u00f3n lys_restr_dup(). Las aplicaciones que usan libyang para analizar archivos de entrada yang no confiables pueden bloquearse."
    }
  ],
  "id": "CVE-2019-20398",
  "lastModified": "2024-11-21T04:38:23.490",
  "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": "2020-01-22T22:15:10.627",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1793935"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08"
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    },
    {
      "source": "cve@mitre.org",
      "tags": [
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        "Third Party Advisory"
      ],
      "url": "https://github.com/CESNET/libyang/issues/773"
    },
    {
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      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
    },
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      "tags": [
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    },
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      "tags": [
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      "url": "https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html"
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Detection rules are retrieved from Rulezet.