tcpreplay — security advisory
An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service.
- Products
- tcpreplay
- Affected versions
- Not specified
- Fixed versions
- 4.3.1-1
- CVEs
- CVE-2018-17974
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:54 UTC · Revision 1
Source evidence
An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service.
osv:DEBIAN-CVE-2018-17974
tcpreplay
Fixed versions: 4.3.1-1
tcpreplay
Fixed versions: 4.3.1-1
tcpreplay
Fixed versions: 4.3.1-1
Complete source record
{
"id": "3be0d639d0e0f057081968e42bbe3fef92df866c70c487256b90ac20a6679a8a",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-17974",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-17974",
"summary": "An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer over-read was triggered in the function dlt_en10mb_encode() of the file plugins/dlt_en10mb/en10mb.c, due to inappropriate values in the function memmove(). The length (pktlen + ctx -> l2len) can be larger than source value (packet + ctx->l2len) because the function fails to ensure the length of a packet is valid. This leads to Denial of Service.",
"evidence": "osv:DEBIAN-CVE-2018-17974",
"products": [
{
"name": {
"value": "tcpreplay",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tcpreplay",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "tcpreplay",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2018-17974",
"aliases": [
"DEBIAN-CVE-2018-17974"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.1-1"
}
]
}
],
"package": {
"name": "tcpreplay",
"purl": "pkg:deb/debian/tcpreplay?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-17974.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.1-1"
}
]
}
],
"package": {
"name": "tcpreplay",
"purl": "pkg:deb/debian/tcpreplay?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-17974.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.3.1-1"
}
]
}
],
"package": {
"name": "tcpreplay",
"purl": "pkg:deb/debian/tcpreplay?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-17974.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:55.539736324Z",
"provider": "osv",
"upstream": [
"CVE-2018-17974"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-17974"
]
},
"related_cves": [
{
"value": "CVE-2018-17974",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 422642,
"published_at": "2018-10-03T22:29:00.907+00:00"
}