Critical
Security advisory
libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string, which allows remote attackers to bypass authentication and establish a VNC session by connecting to the server.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-5008
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:13 UTC · Revision 1
Source evidence
libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string, which allows remote attackers to bypass authentication and establish a VNC session by connecting to the server.
osv:CVE-2016-5008
Complete source record
{
"id": "91803e93019b9f413040511c08478c80131befbcadd62527b3eeebc80f2337f7",
"url": "https://osv.dev/vulnerability/CVE-2016-5008",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-5008",
"summary": "libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string, which allows remote attackers to bypass authentication and establish a VNC session by connecting to the server.",
"evidence": "osv:CVE-2016-5008",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2016-5008",
"aliases": [
"CVE-2016-5008"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/libvirt/libvirt",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "7324444bc70dcc3e2d1fe0baa640712efb99e273"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.3.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
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}
},
{
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}
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-5008.json"
}
}
],
"modified": "2026-10-24T10:30:15.449268294Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZZMOMRXNPALA34XDF5NK363KDLAYSTL/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QTQF6LXKEEMJG4VOOCIAPJAD6ACBYP4W/",
"https://usn.ubuntu.com/3576-1/",
"https://bugzilla.redhat.com/show_bug.cgi?id=1180092"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-5008",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 429149,
"published_at": "2016-07-13T15:59:05.873+00:00"
}