High
openvpn — security advisory
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Products
- openvpn
- Affected versions
- 2.3.10-1ubuntu1, 2.3.10-1ubuntu2, 2.3.10-1ubuntu2.1, 2.3.10-1ubuntu2.2, 2.3.10-1ubuntu2.2+esm1, 2.3.10-1ubuntu2.2+esm2, 2.3.2-4ubuntu1, 2.3.2-5ubuntu1, 2.3.2-7ubuntu1, 2.3.2-7ubuntu2, 2.3.2-7ubuntu3, 2.3.2-7ubuntu3.1, 2.3.2-7ubuntu3.2, 2.3.2-7ubuntu3.2+esm1, 2.3.2-7ubuntu3.2+esm2, 2.3.7-1ubuntu1, 2.3.7-2ubuntu1, 2.3.8-1ubuntu1, 2.4.12-0ubuntu0.20.04.1, 2.4.12-0ubuntu0.20.04.2, 2.4.3-4ubuntu1, 2.4.4-1ubuntu1, 2.4.4-2ubuntu1, 2.4.4-2ubuntu1.1, 2.4.4-2ubuntu1.2, 2.4.4-2ubuntu1.3, 2.4.4-2ubuntu1.5, 2.4.4-2ubuntu1.6, 2.4.4-2ubuntu1.7, 2.4.4-2ubuntu1.7+esm1, 2.4.7-1ubuntu2, 2.4.7-1ubuntu2.20.04.2, 2.4.7-1ubuntu2.20.04.3, 2.4.7-1ubuntu2.20.04.4, 2.5.1-3ubuntu1, 2.5.1-3ubuntu2, 2.5.1-3ubuntu4, 2.5.1-3ubuntu5, 2.5.11-0ubuntu0.22.04.1, 2.5.11-0ubuntu0.22.04.3, 2.5.11-0ubuntu0.22.04.4, 2.5.11-0ubuntu0.22.04.5, 2.5.11-0ubuntu0.22.04.6, 2.5.5-1ubuntu1, 2.5.5-1ubuntu3, 2.5.5-1ubuntu3.1, 2.5.9-0ubuntu0.22.04.2, 2.5.9-0ubuntu0.22.04.3, 2.6.12-0ubuntu0.24.04.1, 2.6.12-0ubuntu0.24.04.3, 2.6.14-0ubuntu0.24.04.1, 2.6.14-0ubuntu0.24.04.2, 2.6.14-0ubuntu0.24.04.3, 2.6.19-0ubuntu0.24.04.1, 2.6.19-0ubuntu0.24.04.2, 2.6.19-0ubuntu0.24.04.3, 2.6.19-0ubuntu0.24.04.4, 2.6.19-0ubuntu0.24.04.5, 2.6.5-0ubuntu1, 2.6.7-1ubuntu1, 2.6.9-1ubuntu2, 2.6.9-1ubuntu3, 2.6.9-1ubuntu4, 2.6.9-1ubuntu4.1
- Fixed versions
- Not specified
- CVEs
- CVE-2020-20813
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 19:26 UTC · Revision 1
Source evidence
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
osv:UBUNTU-CVE-2020-20813
openvpn
Fixed versions: Not specified
openvpn
Fixed versions: Not specified
openvpn
Fixed versions: Not specified
openvpn
Fixed versions: Not specified
openvpn
Fixed versions: Not specified
openvpn
Fixed versions: Not specified
Complete source record
{
"id": "bbf4f88036d745fa1055e6e789f3e96477faf5b6c546a62610c240aac654101d",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-20813",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2020-20813",
"summary": "Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.",
"evidence": "osv:UBUNTU-CVE-2020-20813",
"products": [
{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/2/versions"
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{
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
},
{
"value": "2.4.7-1ubuntu2.20.04.3",
"evidence": "/affected/3/versions"
},
{
"value": "2.4.7-1ubuntu2.20.04.4",
"evidence": "/affected/3/versions"
},
{
"value": "2.4.12-0ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
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{
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{
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"evidence": "/affected/4/package/name"
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{
"value": "2.5.1-3ubuntu2",
"evidence": "/affected/4/versions"
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{
"value": "2.5.1-3ubuntu4",
"evidence": "/affected/4/versions"
},
{
"value": "2.5.1-3ubuntu5",
"evidence": "/affected/4/versions"
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{
"value": "2.5.5-1ubuntu1",
"evidence": "/affected/4/versions"
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{
"value": "2.5.5-1ubuntu3",
"evidence": "/affected/4/versions"
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{
"value": "2.5.5-1ubuntu3.1",
"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
},
{
"value": "2.5.9-0ubuntu0.22.04.3",
"evidence": "/affected/4/versions"
},
{
"value": "2.5.11-0ubuntu0.22.04.1",
"evidence": "/affected/4/versions"
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{
"value": "2.5.11-0ubuntu0.22.04.3",
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{
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{
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{
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"evidence": "/affected/5/versions"
},
{
"value": "2.6.12-0ubuntu0.24.04.3",
"evidence": "/affected/5/versions"
},
{
"value": "2.6.14-0ubuntu0.24.04.1",
"evidence": "/affected/5/versions"
},
{
"value": "2.6.14-0ubuntu0.24.04.2",
"evidence": "/affected/5/versions"
},
{
"value": "2.6.14-0ubuntu0.24.04.3",
"evidence": "/affected/5/versions"
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{
"value": "2.6.19-0ubuntu0.24.04.1",
"evidence": "/affected/5/versions"
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{
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],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2020-20813",
"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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{
"type": "ECOSYSTEM",
"events": [
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],
"package": {
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},
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},
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},
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},
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},
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"database_specific": {
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},
"ecosystem_specific": {
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{
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}
]
}
}
],
"modified": "2026-10-22T23:16:19.594465864Z",
"provider": "osv",
"upstream": [
"CVE-2020-20813"
],
"references": [
"https://ubuntu.com/security/CVE-2020-20813",
"https://www.freebuf.com/vuls/215171.html",
"https://www.cve.org/CVERecord?id=CVE-2020-20813"
]
},
"related_cves": [
{
"value": "CVE-2020-20813",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 410058,
"published_at": "2023-08-22T19:16:00+00:00"
}