CVE-2017-12166
CRITICALCVSS 9.8/10EPSS 3.63%
Last modified
CVE-2017-12166 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 3.63% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openvpn | Openvpn | < 2.3.18 |
| Openvpn | Openvpn | >= 2.4.0, < 2.4.4 |
| Debian | Debian Linux | 9.0 |
References
- http://www.securityfocus.com/bid/101153Third Party Advisory, VDB Entry, URL Repurposed
- http://www.securitytracker.com/id/1039470Third Party Advisory, VDB Entry, URL Repurposed
- https://community.openvpn.net/openvpn/wiki/CVE-2017-12166Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00002.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/101153Third Party Advisory, VDB Entry, URL Repurposed
- http://www.securitytracker.com/id/1039470Third Party Advisory, VDB Entry, URL Repurposed
- https://community.openvpn.net/openvpn/wiki/CVE-2017-12166Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/05/msg00002.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-12166?
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.
How severe is CVE-2017-12166?
CVE-2017-12166 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.63% probability of exploitation in the next 30 days.
How do I fix CVE-2017-12166?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2017-12166?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST