vulnerability
Arch Linux: Arbitrary code execution (CVE-2017-12166)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Oct 3, 2017 | Jul 11, 2025 | Nov 27, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Oct 3, 2017
Added
Jul 11, 2025
Modified
Nov 27, 2025
Description
The bounds check in the read_key() function in OpenVPN before 2.4.4 and 2.3.18 was performed after using the value, instead of before. If 'key-method 1' is used, this allowed an attacker to send a malformed packet to trigger a stack buffer overflow.
Note that 'key-method 1' has been replaced by 'key method 2' as the default in OpenVPN 2.0 (released on 2005-04-17), and explicitly deprecated in 2.4 and marked for removal in 2.5. This should limit the amount of users impacted by this issue.
Note that 'key-method 1' has been replaced by 'key method 2' as the default in OpenVPN 2.0 (released on 2005-04-17), and explicitly deprecated in 2.4 and marked for removal in 2.5. This should limit the amount of users impacted by this issue.
Solution
arch-linux-upgrade-latest
References
- CVE-2017-12166
- https://attackerkb.com/topics/CVE-2017-12166
- URL-http://www.securityfocus.com/bid/101153
- URL-http://www.securitytracker.com/id/1039470
- URL-https://community.openvpn.net/openvpn/wiki/CVE-2017-12166
- URL-https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html
- URL-https://security.archlinux.org/ASA-201709-21
- CWE-787
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