CVE-2020-20813
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service...
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Record
CVE-2020-20813- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
CVE List No score
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Record
CVE-2020-20813- Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2020-13593 No score
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Record
EUVD-2020-13593- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6mpq-5wjj-48jg
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service...
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Record
GHSA-6mpq-5wjj-48jg- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Record
CVE-2020-20813- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-20813
Control Channel in OpenVPN 2.4.7 and earlier allows remote attackers to cause a denial of service via crafted reset packet.
- Record
UBUNTU-CVE-2020-20813- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openvpnUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 2.3.2-4ubuntu12.3.2-5ubuntu12.3.2-7ubuntu12.3.2-7ubuntu22.3.2-7ubuntu3 Show 4 moreShow less2.3.2-7ubuntu3.12.3.2-7ubuntu3.22.3.2-7ubuntu3.2+esm12.3.2-7ubuntu3.2+esm2 |
None known |
openvpnUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.3.7-1ubuntu12.3.7-2ubuntu12.3.8-1ubuntu12.3.10-1ubuntu12.3.10-1ubuntu2 Show 4 moreShow less2.3.10-1ubuntu2.12.3.10-1ubuntu2.22.3.10-1ubuntu2.2+esm12.3.10-1ubuntu2.2+esm2 |
None known |
openvpnUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.4.3-4ubuntu12.4.4-1ubuntu12.4.4-2ubuntu12.4.4-2ubuntu1.12.4.4-2ubuntu1.2 Show 5 moreShow less2.4.4-2ubuntu1.32.4.4-2ubuntu1.52.4.4-2ubuntu1.62.4.4-2ubuntu1.72.4.4-2ubuntu1.7+esm1 |
None known |
openvpnUbuntu:20.04:LTS |
All versions, plus listed versions 2.4.7-1ubuntu22.4.7-1ubuntu2.20.04.22.4.7-1ubuntu2.20.04.32.4.7-1ubuntu2.20.04.42.4.12-0ubuntu0.20.04.12.4.12-0ubuntu0.20.04.2 |
None known |
openvpnUbuntu:22.04:LTS |
All versions, plus listed versions 2.5.1-3ubuntu12.5.1-3ubuntu22.5.1-3ubuntu42.5.1-3ubuntu52.5.5-1ubuntu1 Show 9 moreShow less2.5.5-1ubuntu32.5.5-1ubuntu3.12.5.9-0ubuntu0.22.04.22.5.9-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.12.5.11-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.42.5.11-0ubuntu0.22.04.52.5.11-0ubuntu0.22.04.6 |
None known |
openvpnUbuntu:24.04:LTS |
All versions, plus listed versions 2.6.5-0ubuntu12.6.7-1ubuntu12.6.9-1ubuntu22.6.9-1ubuntu32.6.9-1ubuntu4 Show 11 moreShow less2.6.9-1ubuntu4.12.6.12-0ubuntu0.24.04.12.6.12-0ubuntu0.24.04.32.6.14-0ubuntu0.24.04.12.6.14-0ubuntu0.24.04.22.6.14-0ubuntu0.24.04.32.6.19-0ubuntu0.24.04.12.6.19-0ubuntu0.24.04.22.6.19-0ubuntu0.24.04.32.6.19-0ubuntu0.24.04.42.6.19-0ubuntu0.24.04.5 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-20813 is a high vulnerability (CVSS 7.5) in Openvpn, published August 22, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.92%, the 60th percentile. No source names a fixed version.