libmicrodns, vlc — security advisory
An exploitable denial-of-service vulnerability exists in the resource allocation handling of Videolabs libmicrodns 0.1.0. When encountering errors while parsing mDNS messages, some allocated data is not freed, possibly leading to a denial-of-service condition via resource exhaustion. An attacker can send one mDNS message repeatedly to trigger this vulnerability through the function rr_read_RR [5] reads the current resource record, except for the RDATA section. This is read by the loop at in rr_read. For each RR type, a different function is called. When the RR type is 0x10, the function rr_read_TXT is called at [6].
- Products
- libmicrodns, vlc
- Affected versions
- Not specified
- Fixed versions
- 0.2.0-1, 3.0.8-4
- CVEs
- CVE-2020-6080
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 13:52 UTC · Revision 1
Source evidence
An exploitable denial-of-service vulnerability exists in the resource allocation handling of Videolabs libmicrodns 0.1.0. When encountering errors while parsing mDNS messages, some allocated data is not freed, possibly leading to a denial-of-service condition via resource exhaustion. An attacker can send one mDNS message repeatedly to trigger this vulnerability through the function rr_read_RR [5] reads the current resource record, except for the RDATA section. This is read by the loop at in rr_read. For each RR type, a different function is called. When the RR type is 0x10, the function rr_read_TXT is called at [6].
osv:DEBIAN-CVE-2020-6080
libmicrodns
Fixed versions: 0.2.0-1
libmicrodns
Fixed versions: 0.2.0-1
vlc
Fixed versions: 3.0.8-4
vlc
Fixed versions: 3.0.8-4
vlc
Fixed versions: 3.0.8-4
Complete source record
{
"id": "0d9cc6826e1d1c9f098a6e284a1723a277f7414ed4d334304cfd7cf6d1e75a98",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-6080",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2020-6080",
"summary": "An exploitable denial-of-service vulnerability exists in the resource allocation handling of Videolabs libmicrodns 0.1.0. When encountering errors while parsing mDNS messages, some allocated data is not freed, possibly leading to a denial-of-service condition via resource exhaustion. An attacker can send one mDNS message repeatedly to trigger this vulnerability through the function rr_read_RR [5] reads the current resource record, except for the RDATA section. This is read by the loop at in rr_read. For each RR type, a different function is called. When the RR type is 0x10, the function rr_read_TXT is called at [6].",
"evidence": "osv:DEBIAN-CVE-2020-6080",
"products": [
{
"name": {
"value": "libmicrodns",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "0.2.0-1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/1/ranges"
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],
"affected_versions": []
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
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{
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"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
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}
],
"affected_versions": []
},
{
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"affected_versions": []
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2020-6080",
"aliases": [
"DEBIAN-CVE-2020-6080"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
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],
"package": {
"name": "libmicrodns",
"purl": "pkg:deb/debian/libmicrodns?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-6080.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
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},
{
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],
"package": {
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"purl": "pkg:deb/debian/libmicrodns?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-6080.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
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},
{
"ranges": [
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],
"package": {
"name": "vlc",
"purl": "pkg:deb/debian/vlc?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-6080.json"
},
"ecosystem_specific": {
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},
{
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],
"package": {
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"purl": "pkg:deb/debian/vlc?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-6080.json"
},
"ecosystem_specific": {
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},
{
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{
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{
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],
"package": {
"name": "vlc",
"purl": "pkg:deb/debian/vlc?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-6080.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-26T12:02:45.177090195Z",
"provider": "osv",
"upstream": [
"CVE-2020-6080"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2020-6080"
]
},
"related_cves": [
{
"value": "CVE-2020-6080",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 452936,
"published_at": "2020-03-24T21:15:14.473+00:00"
}