High
Security advisory
The MS-SAMR and MS-LSAD protocol implementations in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 mishandle DCERPC connections, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka "BADLOCK."
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-2118
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:36 UTC · Revision 1
Source evidence
The MS-SAMR and MS-LSAD protocol implementations in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 mishandle DCERPC connections, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka "BADLOCK."
osv:CVE-2016-2118
Complete source record
{
"id": "3846d76562482d77194308f5aa2a7f8e640b5751404a7851a196747341d96f53",
"url": "https://osv.dev/vulnerability/CVE-2016-2118",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-2118",
"summary": "The MS-SAMR and MS-LSAD protocol implementations in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 mishandle DCERPC connections, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka \"BADLOCK.\"",
"evidence": "osv:CVE-2016-2118",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2016-2118",
"aliases": [
"CVE-2016-2118"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/samba-team/samba",
"type": "GIT",
"events": [
{
"introduced": "b1d9ddf738c6e59e489bc9c339ce6de5988b689e"
},
{
"fixed": "343f384dd39bf05867461fde4c79167604d99f98"
},
{
"introduced": "b85f6018c803fb9aad82820d4b5505179ec5bac3"
},
{
"fixed": "6597749526d747283d435ea37eee5890fe7c46cd"
},
{
"introduced": "30812c414bb0ceb95abae08c35b94b2f97be4c5c"
},
{
"fixed": "c8180d1f65fe205e8847b08355622e8cec162a1d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.6.0"
},
{
"fixed": "4.2.10"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.3.0"
},
{
"fixed": "4.3.7"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.1"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"samba-4.3.6",
"samba-4.4.0",
"samba-4.3.5",
"samba-4.3.4",
"samba-4.3.2",
"samba-4.3.1",
"samba-4.3.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-2118.json"
}
}
],
"modified": "2026-10-24T10:30:20.789273683Z",
"provider": "osv",
"references": [
"https://access.redhat.com/security/vulnerabilities/badlock",
"https://bto.bluecoat.com/security-advisory/sa122",
"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399",
"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05166182",
"https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes",
"https://kb.netapp.com/support/s/article/ka51A0000008SXzQAM/smb-vulnerabilities-in-multiple-netapp-products",
"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40196",
"https://security.gentoo.org/glsa/201612-47",
"https://www.kb.cert.org/vuls/id/813296",
"https://www.samba.org/samba/history/samba-4.2.10.html",
"https://www.samba.org/samba/latest_news.html#4.4.2",
"https://www.samba.org/samba/security/CVE-2016-2118.html"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "12.04"
},
{
"last_affected": "12.04"
},
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "15.10"
},
{
"last_affected": "15.10"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "7.0"
},
{
"last_affected": "7.0"
},
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-2118",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430337,
"published_at": "2016-04-12T23:59:37.497+00:00"
}