CVE-2021-30027

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-30027
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-30027.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-30027
Downstream
Published
2021-04-29T15:15:11Z
Modified
2025-09-16T07:15:40.768709Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

mdanalyzeline in md4c.c in md4c 0.4.7 allows attackers to trigger use of uninitialized memory, and cause a denial of service via a malformed Markdown document.

References

Affected packages

Debian:11 / md4c

Package

Name
md4c
Purl
pkg:deb/debian/md4c?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.7-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / md4c

Package

Name
md4c
Purl
pkg:deb/debian/md4c?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.7-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / md4c

Package

Name
md4c
Purl
pkg:deb/debian/md4c?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.7-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / md4c

Package

Name
md4c
Purl
pkg:deb/debian/md4c?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.4.7-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Git / github.com/mity/md4c

Affected ranges

Type
GIT
Repo
https://github.com/mity/md4c
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4fc808d8fe8d8904f8525bb4231d854f45e23a19

Affected versions

release-0.*

release-0.2.0
release-0.2.1
release-0.2.3
release-0.2.4
release-0.2.5
release-0.2.6
release-0.2.7
release-0.3.0
release-0.3.0-rc
release-0.3.1
release-0.3.2
release-0.3.3
release-0.3.4
release-0.4.0
release-0.4.1
release-0.4.2
release-0.4.3
release-0.4.4
release-0.4.5
release-0.4.6
release-0.4.7

Database specific 

{
    "vanir_signatures": [
        {
            "signature_type": "Function",
            "deprecated": false,
            "signature_version": "v1",
            "digest": {
                "function_hash": "322245608022275724480425469479335526165",
                "length": 10908.0
            },
            "id": "CVE-2021-30027-aafeb3c5",
            "source": "https://github.com/mity/md4c/commit/4fc808d8fe8d8904f8525bb4231d854f45e23a19",
            "target": {
                "function": "md_analyze_line",
                "file": "src/md4c.c"
            }
        },
        {
            "signature_type": "Line",
            "deprecated": false,
            "signature_version": "v1",
            "digest": {
                "line_hashes": [
                    "128530702601737101811727024586890550753",
                    "98473776384372157529680730225100509720",
                    "282087636836527325486394792471415280100",
                    "313970169583545866153292837680168776702",
                    "283521056716158467520872169441972465266",
                    "321152261436292213196061633460465514572",
                    "199537899354753774750169400073557411872",
                    "202499592155105600623179137581181437845",
                    "174112236338003714963880316886125584952",
                    "64528996485019690033480507456819749288",
                    "40781584929695501939010212285647372006",
                    "211144263441560594281229750485882864073",
                    "108532761455042207769192576660881309813",
                    "301004014917007072830086453236187746024",
                    "159215856006652495965340164355596265201",
                    "338671760556097010649039124482390622635",
                    "310442026149672368764116397330189875207",
                    "247800360932106444803672585103536412825",
                    "174798969617264694913491682126884538618",
                    "81105429030443539012110219833419686059",
                    "34773241901086520411897294352802850480",
                    "216350882354716231614067117431856901232",
                    "214563497792942822017538392314037574131",
                    "274558718265672796844056938807883132573",
                    "82345420663438109749465528145197249249",
                    "306622871234171740882970515189805638101",
                    "186240891863141040798060690227249672488",
                    "181478689956031745429399673169121431810",
                    "202559148123131947237765628721083981518",
                    "255237651156812476656622229190067102892"
                ],
                "threshold": 0.9
            },
            "id": "CVE-2021-30027-f3156ffc",
            "source": "https://github.com/mity/md4c/commit/4fc808d8fe8d8904f8525bb4231d854f45e23a19",
            "target": {
                "file": "src/md4c.c"
            }
        }
    ]
}