CRITICAL
OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution
Published Oct 3, 2017
9.8
CRITICALCVSS 3.1
EPSS 3.63%
Description
OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting in code execution.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
6.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.63% 0.03629
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03629
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.63% (0.03629) | 89.17th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.63% (0.03629) | 88.03th | v5 (v2026.06.15) |
| Nov 12, 2025 | 1.33% (0.01330) | 79.32th | v4 (v2025.03.14) |
| May 13, 2025 | 5.14% (0.05144) | 89.30th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.13% (0.01127) | 76.34th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.64% (0.02637) | 76.14th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.22% (0.01223) | 77.73th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.38% (0.00380) | 72.61th | v3 (v2023.03.01) |
| Apr 4, 2024 | 0.71% (0.00709) | 80.05th | v3 (v2023.03.01) |
| Sep 13, 2023 | 0.71% (0.00709) | 78.05th | v3 (v2023.03.01) |
| Aug 13, 2023 | 0.72% (0.00717) | 78.06th | v3 (v2023.03.01) |
| Jul 19, 2023 | 0.77% (0.00774) | 78.97th | v3 (v2023.03.01) |
| May 23, 2023 | 1.54% (0.01538) | 85.16th | v3 (v2023.03.01) |
| May 8, 2023 | 1.82% (0.01825) | 86.39th | v3 (v2023.03.01) |
| Apr 5, 2023 | 3.01% (0.03011) | 89.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.29% (0.04291) | 90.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.58% (0.02578) | 82.08th | v2 (v2022.01.01) |
| Jun 30, 2022 | 2.58% (0.02578) | 80.79th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.51% (0.02509) | 80.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.51% (0.02509) | 58.60th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.46% (0.01458) | 32.87th | v1 |
| Jan 6, 2022 | 1.46% (0.01458) | 32.17th | v1 |
| Sep 1, 2021 | 1.46% (0.01458) | 72.29th | v1 |
| Apr 14, 2021 | 1.46% (0.01458) | 0.00th | v1 |
Weaknesses (1)
References (4)
- http://www.securityfocus.com/bid/101153 vdb-entryx_refsource_BIDThird Party AdvisoryVDB EntryURL Repurposed
- http://www.securitytracker.com/id/1039470 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB EntryURL Repurposed
- https://community.openvpn.net/openvpn/wiki/CVE-2017-12166 x_refsource_MISCPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/101153 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB EntryURL Repurposed | |
| http://www.securitytracker.com/id/1039470 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB EntryURL Repurposed | |
| https://community.openvpn.net/openvpn/wiki/CVE-2017-12166 | x_refsource_MISCPatchVendor Advisory | |
| https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Oct 3, 2017
Updated Aug 5, 2024
Reserved Aug 1, 2017
Link CVE-2017-12166
CISA Vulnrichment
Updated n/a