CVE-2019-19334

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.

Database specific

{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "31"
                },
                {
                    "last_affected": "31"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "fedoraproject:fedora",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "8.0"
                },
                {
                    "last_affected": "8.0"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "redhat:enterprise_linux",
            "cpes": [
                "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
            ]
        }
    ]
}

References

Affected packages

Git / github.com/cesnet/libyang

Affected ranges

Type

GIT

Repo

https://github.com/cesnet/libyang

Events

Introduced

14a95280b2bd77b5fd1d9b5f8af71b15679f1a8f

Last affected

64248ec90179740e66416c78e0b3b914a8a07d30

Fixed

6980afae2ff9fcd6d67508b0a3f694d75fd059d6

Database specific

{
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "cpe": [
        "cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:1.0:r3:*:*:*:*:*:*",
        "cpe:2.3:a:cesnet:libyang:1.0:r4:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0.11-r1"
        },
        {
            "last_affected": "0.11-r1"
        },
        {
            "introduced": "0.11-r2"
        },
        {
            "last_affected": "0.11-r2"
        },
        {
            "introduced": "0.12-r1"
        },
        {
            "last_affected": "0.12-r1"
        },
        {
            "introduced": "0.12-r2"
        },
        {
            "last_affected": "0.12-r2"
        },
        {
            "introduced": "0.13-r1"
        },
        {
            "last_affected": "0.13-r1"
        },
        {
            "introduced": "0.13-r2"
        },
        {
            "last_affected": "0.13-r2"
        },
        {
            "introduced": "0.14-r1"
        },
        {
            "last_affected": "0.14-r1"
        },
        {
            "introduced": "0.15-r1"
        },
        {
            "last_affected": "0.15-r1"
        },
        {
            "introduced": "0.16-r1"
        },
        {
            "last_affected": "0.16-r1"
        },
        {
            "introduced": "0.16-r2"
        },
        {
            "last_affected": "0.16-r2"
        },
        {
            "introduced": "0.16-r3"
        },
        {
            "last_affected": "0.16-r3"
        },
        {
            "introduced": "1.0-r1"
        },
        {
            "last_affected": "1.0-r1"
        },
        {
            "introduced": "1.0-r2"
        },
        {
            "last_affected": "1.0-r2"
        },
        {
            "introduced": "1.0-r3"
        },
        {
            "last_affected": "1.0-r3"
        },
        {
            "introduced": "1.0-r4"
        },
        {
            "last_affected": "1.0-r4"
        }
    ]
}

Affected versions

0.*

0.11-r1

0.11-r2

0.12-r1

0.12-r2

0.13-r1

0.13-r2

0.14-r1

0.15-r1

0.16-r1

0.16-r2

0.16-r3

1.*

1.0-r1

1.0-r2

1.0-r3

1.0-r4

v0.*

v0.11-r1

v0.11-r2

v0.12-r1

v0.12-r2

v0.13-r2

v0.14-r1

v0.15-r1

v0.16-r1

v0.16-r2

v1.*

v1.0-r1

v1.0-r2

v1.0-r3

v1.0-r4

Database specific

vanir_signatures_modified

"2026-07-08T20:16:00Z"

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19334.json"

vanir_signatures

[
    {
        "id": "CVE-2019-19334-0fc85d57",
        "digest": {
            "line_hashes": [
                "292995609282841363669975935046566204682",
                "149517033522983099106477072070701937564",
                "297297297624460440254951196547675551567",
                "72996930533404138982397399557811059557",
                "274334248161745766359455477880545863750",
                "199060229445835364465972116034786537046"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/cesnet/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6",
        "deprecated": false,
        "target": {
            "file": "src/parser.c"
        }
    },
    {
        "id": "CVE-2019-19334-8e9f3d59",
        "digest": {
            "function_hash": "264754062392839519042860666898880122305",
            "length": 3550.0
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/cesnet/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6",
        "deprecated": false,
        "target": {
            "function": "make_canonical",
            "file": "src/parser.c"
        }
    }
]