CVE-2019-20395

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Source
https://nvd.nist.gov/vuln/detail/CVE-2019-20395
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-20395.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2019-20395
Downstream
Published
2020-01-22T22:15:10.423Z
Modified
2025-11-14T09:35:10.219930Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
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.

References

Affected packages

Git / github.com/cesnet/libyang

Affected ranges

Type
GIT
Repo
https://github.com/cesnet/libyang
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4e610ccd87a2ba9413819777d508f71163fcc237

Affected versions

v0.*

v0.11-r1
v0.11-r2
v0.12-r1
v0.12-r2
v0.13-r1
v0.13-r2
v0.14-r1
v0.15-r1
v0.16-r1
v0.16-r2
v0.16-r3

Database specific

vanir_signatures

[
    {
        "digest": {
            "line_hashes": [
                "3709349080758321315407667873054799407",
                "40654331277087705153599236626700139120",
                "218179774092547475255011025591562155373",
                "26945906380788539331119058460512143650",
                "264360412021372370516957297717262205066",
                "284379208038719699281704151082864052738",
                "171523464213288179775304606129955718185",
                "173219762027759162992708704487438489215",
                "169767442580532088647275499892906396249",
                "163540545431702451184062262278825169497",
                "230432405834600232943716359155561282208",
                "210958065997923273270503473910467040005",
                "52705719169573697649606145238168379853",
                "74978519002525096908372406906754533918",
                "338968714568132339179493525815625457068",
                "110431218070066215195198435093039810576",
                "168996680281455421702825745518376836742",
                "237265185966647641462833730081134853855",
                "130432884066073796841987305543045007877",
                "41856024564754209253740145975891080938",
                "187918657215396913159733145370849044587",
                "235627434437076040235478635208155584990",
                "156231516063688709759703948455246765715",
                "281878610022157967428454344263993798914",
                "37651723104265209483492304430164809389",
                "17285245695473915830116170919378033615",
                "68990558883184452840172507034795811974",
                "91835791136993315471851169704730021515",
                "179910586640509158592462293263687892249",
                "32072546804617593968369651922607475827",
                "212636670241501265826527964257535120951",
                "169169816915948622447376095793041624614",
                "203215452072960001537708029648505410179",
                "167325683983032162877898557235445539388",
                "50591885780544046276219277659510187527",
                "334471996539810398492372019661608692698"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "src/resolve.c"
        },
        "deprecated": false,
        "id": "CVE-2019-20395-1d76204d",
        "signature_version": "v1",
        "source": "https://github.com/cesnet/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237",
        "signature_type": "Line"
    },
    {
        "digest": {
            "length": 2365.0,
            "function_hash": "35331683292158375526001179803226955979"
        },
        "target": {
            "file": "src/resolve.c",
            "function": "resolve_superior_type"
        },
        "deprecated": false,
        "id": "CVE-2019-20395-59c63e27",
        "signature_version": "v1",
        "source": "https://github.com/cesnet/libyang/commit/4e610ccd87a2ba9413819777d508f71163fcc237",
        "signature_type": "Function"
    }
]