Medium
tcpdump — security advisory
In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.
- Products
- tcpdump
- Affected versions
- 4.99.3-1, 4.99.4-1, 4.99.4-2, 4.99.4-3, 4.99.4-4, 4.99.4-5, 4.99.5-1, 4.99.5-2, 4.99.5-3, 4.99.6-1, 4.99.6-2
- Fixed versions
- Not specified
- CVEs
- CVE-2018-19519
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:10 UTC · Revision 1
Source evidence
In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.
osv:DEBIAN-CVE-2018-19519
tcpdump
Fixed versions: Not specified
tcpdump
Fixed versions: Not specified
tcpdump
Fixed versions: Not specified
Complete source record
{
"id": "8c143d9cbd6f61d6013eb8aae624551c0a7323400826b2fdfea8d885eeb76c86",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-19519",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-19519",
"summary": "In tcpdump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c via crafted packet data because of missing initialization.",
"evidence": "osv:DEBIAN-CVE-2018-19519",
"products": [
{
"name": {
"value": "tcpdump",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.99.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.4-3",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.4-4",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.4-5",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.5-2",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.5-3",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "4.99.6-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
},
{
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{
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},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "4.99.5-2",
"evidence": "/affected/2/versions"
},
{
"value": "4.99.5-3",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
},
{
"value": "4.99.6-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2018-19519",
"aliases": [
"DEBIAN-CVE-2018-19519"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tcpdump",
"purl": "pkg:deb/debian/tcpdump?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.99.3-1",
"4.99.4-1",
"4.99.4-2",
"4.99.4-3",
"4.99.4-4",
"4.99.4-5",
"4.99.5-1",
"4.99.5-2",
"4.99.5-3",
"4.99.6-1",
"4.99.6-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19519.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tcpdump",
"purl": "pkg:deb/debian/tcpdump?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.99.5-2",
"4.99.5-3",
"4.99.6-1",
"4.99.6-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19519.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "tcpdump",
"purl": "pkg:deb/debian/tcpdump?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"4.99.5-2",
"4.99.5-3",
"4.99.6-1",
"4.99.6-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-19519.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-23T18:03:03.851095242Z",
"provider": "osv",
"upstream": [
"CVE-2018-19519"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-19519"
]
},
"related_cves": [
{
"value": "CVE-2018-19519",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 420269,
"published_at": "2018-11-25T20:29:00.273+00:00"
}