CVE-2017-7520 Denial of service in OpenVPN
A man-in-the-middle attacker can cause denial of service or leak sensitive memory in OpenVPN servers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-7520?
CVE-2017-7520 is a high-severity denial of service vulnerability in OpenVPN, published on 27 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.
Which versions are affected by CVE-2017-7520?
It affects 1 product.
Products include Openvpn Openvpn.
How do I fix CVE-2017-7520?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-7520 being exploited?
There is no known exploitation of CVE-2017-7520 in the wild and no public exploit code.
Other vulnerabilities in OpenVPN
Sources
Also known as DEBIAN-CVE-2017-7520, DLA-999-1, GHSA-757r-jmm6-p24p, UBUNTU-CVE-2017-7520.