CVE-2020-27638

See a problem?
Please try reporting it to the source first.
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
2026-04-11T11:23:31.673484Z
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.

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
737925113363b6130879729cdff9ccc46c33eaea
Type
GIT
Repo
https://github.com/neoraider/fastd
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
2ce6095b2795052e34110599c484205468fb9fa6
Database specific 
{
    "versions": [
        {
            "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_modified 
"2026-04-11T11:23:31Z"
vanir_signatures 
[
    {
        "id": "CVE-2020-27638-479d7b31",
        "signature_version": "v1",
        "digest": {
            "function_hash": "176340725060813004210905118311611276175",
            "length": 694.0
        },
        "source": "https://github.com/neocturne/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea",
        "deprecated": false,
        "target": {
            "function": "handle_socket_receive_known",
            "file": "src/receive.c"
        },
        "signature_type": "Function"
    },
    {
        "id": "CVE-2020-27638-b0830e65",
        "signature_version": "v1",
        "digest": {
            "function_hash": "279097731734714311607881590027641747637",
            "length": 476.0
        },
        "source": "https://github.com/neocturne/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea",
        "deprecated": false,
        "target": {
            "function": "handle_socket_receive_unknown",
            "file": "src/receive.c"
        },
        "signature_type": "Function"
    },
    {
        "id": "CVE-2020-27638-cf9ffff7",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "218993648070656331698192938340773989964",
                "204748408106242575614860218896531178762",
                "139337633164185874394351173136018775119",
                "211707679463638823627401166846990478979",
                "288152887943536033044038232302204222846",
                "100029604037219442177910336290054639548",
                "264322882793426461474977070951987059818",
                "151738650662340874906420184695183817751"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/neocturne/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea",
        "deprecated": false,
        "target": {
            "file": "src/receive.c"
        },
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27638.json"
unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "fixed": "21.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "9.0"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "31"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "32"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "33"
            }
        ]
    }
]