HighFix available
heimdal, samba — security advisory
A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.
- Products
- heimdal, samba
- Affected versions
- Not specified
- Fixed versions
- 2:4.9.5+dfsg-4, 7.5.0+dfsg-3
- CVEs
- CVE-2018-16860
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 00:28 UTC · Revision 1
Source evidence
A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.
osv:DEBIAN-CVE-2018-16860
heimdal
Fixed versions: 7.5.0+dfsg-3
heimdal
Fixed versions: 7.5.0+dfsg-3
heimdal
Fixed versions: 7.5.0+dfsg-3
samba
Fixed versions: 2:4.9.5+dfsg-4
samba
Fixed versions: 2:4.9.5+dfsg-4
samba
Fixed versions: 2:4.9.5+dfsg-4
Complete source record
{
"id": "a10b354749cfc9106febf0605ca527303d97eaf5fa7648b048784b2ecfce761c",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-16860",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2018-16860",
"summary": "A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.",
"evidence": "osv:DEBIAN-CVE-2018-16860",
"products": [
{
"name": {
"value": "heimdal",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.5.0+dfsg-3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "heimdal",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.5.0+dfsg-3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "heimdal",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.5.0+dfsg-3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "samba",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:4.9.5+dfsg-4",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "samba",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:4.9.5+dfsg-4",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "samba",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:4.9.5+dfsg-4",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2018-16860",
"aliases": [
"DEBIAN-CVE-2018-16860"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.5.0+dfsg-3"
}
]
}
],
"package": {
"name": "heimdal",
"purl": "pkg:deb/debian/heimdal?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-16860.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.5.0+dfsg-3"
}
]
}
],
"package": {
"name": "heimdal",
"purl": "pkg:deb/debian/heimdal?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-16860.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.5.0+dfsg-3"
}
]
}
],
"package": {
"name": "heimdal",
"purl": "pkg:deb/debian/heimdal?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-16860.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.9.5+dfsg-4"
}
]
}
],
"package": {
"name": "samba",
"purl": "pkg:deb/debian/samba?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-16860.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.9.5+dfsg-4"
}
]
}
],
"package": {
"name": "samba",
"purl": "pkg:deb/debian/samba?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-16860.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.9.5+dfsg-4"
}
]
}
],
"package": {
"name": "samba",
"purl": "pkg:deb/debian/samba?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-16860.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:03:19.982065610Z",
"provider": "osv",
"upstream": [
"CVE-2018-16860"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2018-16860"
]
},
"related_cves": [
{
"value": "CVE-2018-16860",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 421177,
"published_at": "2019-07-31T15:15:11.687+00:00"
}