Critical
Security advisory
The VTP parser in tcpdump before 4.9.2 has a buffer over-read in print-vtp.c:vtp_print().
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-13020
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:07 UTC · Revision 1
Source evidence
The VTP parser in tcpdump before 4.9.2 has a buffer over-read in print-vtp.c:vtp_print().
osv:CVE-2017-13020
Complete source record
{
"id": "03a6db8cf20485c9a0738d09f43438cc7e9bdaad6a89594bdbf76e3d7ca02463",
"url": "https://osv.dev/vulnerability/CVE-2017-13020",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-13020",
"summary": "The VTP parser in tcpdump before 4.9.2 has a buffer over-read in print-vtp.c:vtp_print().",
"evidence": "osv:CVE-2017-13020",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2017-13020",
"aliases": [
"CVE-2017-13020"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/the-tcpdump-group/tcpdump",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "993a67c8e648bc8b19881e29a60f41273cfbee7b"
},
{
"fixed": "c5dd7bef5e54da5996dc4713284aa6266ae75b75"
},
{
"fixed": "d692d67332bcc90540088ad8e725eb3279e39863"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "4.9.1"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "c5dd7bef5e54da5996dc4713284aa6266ae75b75"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "d692d67332bcc90540088ad8e725eb3279e39863"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"tcpdump-4.9.1",
"tcpdump-4.9.0",
"tcpdump-4.9.0-bp",
"tcpdump-4.7.0-bp",
"tcpdump-4.6.0-bp",
"tcpdump-4.6.0",
"tcpdump-4.5.0",
"tcpdump-3.8-bp",
"tcpdump-3.7.1",
"tcpdump-3.6.1",
"tcpdump-3.5.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-13020.json",
"vanir_signatures": [
{
"id": "CVE-2017-13020-026c7220",
"digest": {
"length": 3581,
"function_hash": "189016524707002346352972255880292324190"
},
"source": "https://github.com/the-tcpdump-group/tcpdump/commit/c5dd7bef5e54da5996dc4713284aa6266ae75b75",
"target": {
"file": "print-vtp.c",
"function": "vtp_print"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2017-13020-2ab6a4b0",
"digest": {
"threshold": 0.9,
"line_hashes": [
"125022989782758936635811793572214241896",
"23704956859129995782856183300742717689",
"92772574987655080578909755517117719729",
"274532621181560370364875356327450785170",
"314179516151983467578521723028472741904",
"307226669826132609380417879322844317844"
]
},
"source": "https://github.com/the-tcpdump-group/tcpdump/commit/c5dd7bef5e54da5996dc4713284aa6266ae75b75",
"target": {
"file": "print-vtp.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-24T14:09:06Z"
}
}
],
"modified": "2026-10-24T14:09:06.069395556Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHEA-2018:0705",
"https://security.gentoo.org/glsa/201709-23",
"https://support.apple.com/HT208221",
"https://github.com/the-tcpdump-group/tcpdump/commit/d692d67332bcc90540088ad8e725eb3279e39863",
"https://github.com/the-tcpdump-group/tcpdump/commit/c5dd7bef5e54da5996dc4713284aa6266ae75b75"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:tcpdump:tcpdump:*:*:*:*:*:*:*:*"
],
"vendor_product": "tcpdump:tcpdump",
"extracted_events": [
{
"range": [
{
"last_affected": "4.9.1"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
},
{
"introduced": "9.0"
},
{
"last_affected": "9.0"
},
{
"introduced": "10.0"
},
{
"last_affected": "10.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2017-13020",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 443155,
"published_at": "2017-09-14T06:29:01.967+00:00"
}