CVE-2020-27638

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Source
https://cve.org/CVERecord?id=CVE-2020-27638
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27638.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-27638
Downstream
Published
2020-10-22T13:15:15.613Z
Modified
2026-07-08T23:58:17.887487Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "CPE_RANGE",
            "cpes": [
                "cpe:2.3:a:fastd_project:fastd:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fastd_project:fastd",
            "extracted_events": [
                {
                    "fixed": "21.0"
                }
            ]
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
                {
                    "introduced": "9.0"
                },
                {
                    "last_affected": "9.0"
                }
            ]
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
                {
                    "introduced": "31"
                },
                {
                    "last_affected": "31"
                },
                {
                    "introduced": "32"
                },
                {
                    "last_affected": "32"
                },
                {
                    "introduced": "33"
                },
                {
                    "last_affected": "33"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/neocturne/fastd

Affected ranges

Type
GIT
Repo
https://github.com/neocturne/fastd
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2ce6095b2795052e34110599c484205468fb9fa6
Fixed
737925113363b6130879729cdff9ccc46c33eaea
Database specific 
{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "v21"
        }
    ]
}

Affected versions

v0.*
v0.1
v0.1-rc1
v0.1-rc2
v0.1-rc3
v0.1-rc4
v0.2
v0.3
v0.4
v0.4-rc1
v0.4-rc10
v0.4-rc11
v0.4-rc12
v0.4-rc13
v0.4-rc2
v0.4-rc3
v0.4-rc4
v0.4-rc5
v0.4-rc6
v0.4-rc7
v0.4-rc8
v0.4-rc9
v0.5
v0.5-rc1
v0.5-rc2
v0.5-rc3
v0.5-rc4
Other
v10
v11
v12
v13
v14
v15
v16
v17
v18
v19
v20
v6
v6-rc1
v7
v8
v9

Database specific

vanir_signatures 
[
    {
        "digest": {
            "length": 694.0,
            "function_hash": "176340725060813004210905118311611276175"
        },
        "signature_version": "v1",
        "source": "https://github.com/neocturne/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea",
        "signature_type": "Function",
        "target": {
            "function": "handle_socket_receive_known",
            "file": "src/receive.c"
        },
        "id": "CVE-2020-27638-479d7b31",
        "deprecated": false
    },
    {
        "digest": {
            "length": 476.0,
            "function_hash": "279097731734714311607881590027641747637"
        },
        "signature_version": "v1",
        "source": "https://github.com/neocturne/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea",
        "signature_type": "Function",
        "target": {
            "function": "handle_socket_receive_unknown",
            "file": "src/receive.c"
        },
        "id": "CVE-2020-27638-b0830e65",
        "deprecated": false
    },
    {
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "218993648070656331698192938340773989964",
                "204748408106242575614860218896531178762",
                "139337633164185874394351173136018775119",
                "211707679463638823627401166846990478979",
                "288152887943536033044038232302204222846",
                "100029604037219442177910336290054639548",
                "264322882793426461474977070951987059818",
                "151738650662340874906420184695183817751"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/neocturne/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea",
        "signature_type": "Line",
        "target": {
            "file": "src/receive.c"
        },
        "id": "CVE-2020-27638-cf9ffff7",
        "deprecated": false
    }
]
vanir_signatures_modified 
"2026-07-08T23:58:17Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27638.json"