MediumFix available
heimdal, samba — security advisory
A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.
- Products
- heimdal, samba
- Affected versions
- Not specified
- Fixed versions
- 2:4.16.6+dfsg-1, 7.8.git20221115.a6cf945+dfsg-1
- CVEs
- CVE-2022-3437
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 14:57 UTC · Revision 1
Source evidence
A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.
osv:DEBIAN-CVE-2022-3437
heimdal
Fixed versions: 7.8.git20221115.a6cf945+dfsg-1
heimdal
Fixed versions: 7.8.git20221115.a6cf945+dfsg-1
heimdal
Fixed versions: 7.8.git20221115.a6cf945+dfsg-1
samba
Fixed versions: 2:4.16.6+dfsg-1
samba
Fixed versions: 2:4.16.6+dfsg-1
samba
Fixed versions: 2:4.16.6+dfsg-1
Complete source record
{
"id": "4b4ff6feeff8351627a71b2302aa30b213dcb2eb47cbb81e9da9c25523007c43",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-3437",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2022-3437",
"summary": "A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.",
"evidence": "osv:DEBIAN-CVE-2022-3437",
"products": [
{
"name": {
"value": "heimdal",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.8.git20221115.a6cf945+dfsg-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "heimdal",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.8.git20221115.a6cf945+dfsg-1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "heimdal",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "7.8.git20221115.a6cf945+dfsg-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "samba",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:4.16.6+dfsg-1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "samba",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:4.16.6+dfsg-1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "samba",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2:4.16.6+dfsg-1",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2022-3437",
"aliases": [
"DEBIAN-CVE-2022-3437"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.8.git20221115.a6cf945+dfsg-1"
}
]
}
],
"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-2022-3437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "7.8.git20221115.a6cf945+dfsg-1"
}
]
}
],
"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-2022-3437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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},
{
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}
]
}
],
"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-2022-3437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
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{
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]
}
],
"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-2022-3437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.16.6+dfsg-1"
}
]
}
],
"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-2022-3437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2:4.16.6+dfsg-1"
}
]
}
],
"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-2022-3437.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T08:02:39.544941456Z",
"provider": "osv",
"upstream": [
"CVE-2022-3437"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2022-3437"
]
},
"related_cves": [
{
"value": "CVE-2022-3437",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 323899,
"published_at": "2023-01-12T15:15:10.083+00:00"
}