CVE-2018-20820

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Source

https://cve.org/CVERecord?id=CVE-2018-20820

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20820.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2018-20820

Published

2019-04-23T14:29:00.367Z

Modified

2026-04-11T14:54:26.276368Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

read_ujpg in jpgcoder.cc in Dropbox Lepton 1.2.1 allows attackers to cause a denial-of-service (application runtime crash because of an integer overflow) via a crafted file.

References

Affected packages

Git / github.com/dropbox/lepton

Affected ranges

Type

GIT

Repo

https://github.com/dropbox/lepton

Events

Introduced

Last affected

c378cbfa2daaa99e8828be7395013f94cedb1bcc

Fixed

6a5ceefac1162783fffd9506a3de39c85c725761

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.2.1"
        }
    ]
}

Affected versions

1.*

1.0

1.1

1.2

1.2.1

Database specific

vanir_signatures_modified

"2026-04-11T14:54:26Z"

vanir_signatures

[
    {
        "id": "CVE-2018-20820-7adfd9b9",
        "deprecated": false,
        "source": "https://github.com/dropbox/lepton/commit/6a5ceefac1162783fffd9506a3de39c85c725761",
        "signature_version": "v1",
        "signature_type": "Line",
        "target": {
            "file": "src/lepton/jpgcoder.cc"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "291508219202119588538564923276176918018",
                "96625002947938835274224164320718089154",
                "213317746542680356999455718330753692033",
                "173290755242118722020160640458997264056"
            ]
        }
    },
    {
        "id": "CVE-2018-20820-83a08037",
        "deprecated": false,
        "source": "https://github.com/dropbox/lepton/commit/6a5ceefac1162783fffd9506a3de39c85c725761",
        "signature_version": "v1",
        "signature_type": "Function",
        "target": {
            "function": "read_ujpg",
            "file": "src/lepton/jpgcoder.cc"
        },
        "digest": {
            "function_hash": "84036937326432341110227860591100513513",
            "length": 6577.0
        }
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20820.json"