Back
CVE-2017-12166
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 4, 2017
Modified: Jun 17, 2026
CWE-787
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (3)
| Vendor | Product | Version |
|---|---|---|
| openvpn | openvpn | * < 2.3.18 |
| openvpn | openvpn | * ≥ 2.4.0 < 2.4.4 |
| debian | debian_linux | 9.0 |
GitHub Security Advisory GHSA-vffw-rxx6-r4pj
OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow...
References (8)
- http://www.securityfocus.com/bid/101153 Third Party Advisory, VDB Entry, URL Repurposed
- http://www.securitytracker.com/id/1039470 Third Party Advisory, VDB Entry, URL Repurposed
- https://community.openvpn.net/openvpn/wiki/CVE-2017-12166 Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/101153 Third Party Advisory, VDB Entry, URL Repurposed
- http://www.securitytracker.com/id/1039470 Third Party Advisory, VDB Entry, URL Repurposed
- https://community.openvpn.net/openvpn/wiki/CVE-2017-12166 Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html Mailing List, Third Party Advisory
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
3.63%
Top 11% most likely to be exploited
Threat Score
40.3 / 100
Data Sources
NVD
EPSS
GitHub