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…

published October 3, 2017

CVSS
—
EPSS
4%
Percentile
89.4
In the wild
Unconfirmed
What it is

⚠️ A sneaky buffer overflow in OpenVPN could lead to some serious mischief if you're using key-method 1! Think of it like a bowl that’s just too full — if you keep pouring in more soup than it can hold, it overflows and spills everywhere. In this case, the overflow could allow an attacker to execute their own code! If exploited, an attacker could potentially gain control over your system, executing arbitrary code with the same privileges as the OpenVPN process. This means they might mess with your data, spy on your activities, or even hijack your connection — definitely not what you want!

Put simply

Think of it like a bowl that’s just too full — if you keep pouring in more soup than it can hold, it overflows and spills everywhere. In this case, the overflow could allow an attacker to execute their own code! This vulnerability arises in OpenVPN versions prior to 2.3.3 and 2.4.4 when using key-method 1, allowing a buffer overflow that could be leveraged to run malicious code.

What to do

If exploited, an attacker could potentially gain control over your system, executing arbitrary code with the same privileges as the OpenVPN process. This means they might mess with your data, spy on your activities, or even hijack your connection — definitely not what you want! Upgrade your OpenVPN to at least version 2.3.3 or 2.4.4 as soon as possible to mitigate this issue. Regularly check for updates to ensure you’re not running vulnerable versions in the future! You've got this! Secure your VPN and keep those pesky attackers at bay! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.03629 · 89.4th percentile
Published
2017-10-03T19:00Z
EPSS history
Timeline
  • 03 OCT 19:00Z
    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…
    cvelistv5