CVE-2020-21674

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-21674
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-21674.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-21674
Published
2020-10-15T15:15:11.280Z
Modified
2025-11-20T11:20:28.533842Z
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

Heap-based buffer overflow in archivestringappendfromwcs() (archive_string.c) in libarchive-3.4.1dev allows remote attackers to cause a denial of service (out-of-bounds write in heap memory resulting into a crash) via a crafted archive file. NOTE: this only affects users who downloaded the development code from GitHub. Users of the product's official releases are unaffected.

References

Affected packages

Git / github.com/libarchive/libarchive

Affected ranges

Type
GIT
Repo
https://github.com/libarchive/libarchive
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4f085eea879e2be745f4d9bf57e8513ae48157f4

Affected versions

v2.*

v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.1
v2.8.0
v2.8.1
v2.8.2
v2.8.3
v2.8.4
v2.8.5

v3.*

v3.0.0a
v3.0.1b
v3.0.2
v3.0.3
v3.0.4
v3.1.0
v3.1.1
v3.1.2
v3.1.900a
v3.1.901a
v3.2.0
v3.2.1
v3.2.2
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.4.0

Database specific

vanir_signatures

[
    {
        "deprecated": false,
        "source": "https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4",
        "id": "CVE-2020-21674-261c3f39",
        "signature_version": "v1",
        "target": {
            "file": "libarchive/archive_string.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "116072633996693821785027581455796757274",
                "263475613020376564928275470288168600925",
                "35946731963817428492056963881029968778",
                "296071922221007169360767292332859772771",
                "220577582959158359478493625985624478790",
                "24629896105847692471971921686267738172",
                "260617937097323827464431308041105301840",
                "265771018612808281715836621317599184067",
                "131567820986708162080378277940629658416",
                "24629896105847692471971921686267738172",
                "260617937097323827464431308041105301840"
            ]
        },
        "signature_type": "Line"
    },
    {
        "deprecated": false,
        "source": "https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4",
        "id": "CVE-2020-21674-596d9501",
        "signature_version": "v1",
        "target": {
            "file": "libarchive/archive_string.c",
            "function": "archive_string_append_from_wcs"
        },
        "digest": {
            "function_hash": "291484009972018707314609976661061493870",
            "length": 1087.0
        },
        "signature_type": "Function"
    },
    {
        "deprecated": false,
        "source": "https://github.com/libarchive/libarchive/commit/4f085eea879e2be745f4d9bf57e8513ae48157f4",
        "id": "CVE-2020-21674-c8b835c7",
        "signature_version": "v1",
        "target": {
            "file": "libarchive/archive_string.c",
            "function": "strncat_from_utf8_libarchive2"
        },
        "digest": {
            "function_hash": "80370799617205615188298360175217438738",
            "length": 1202.0
        },
        "signature_type": "Function"
    }
]