CVE-2017-7479 Denial of service in openvpn
An authenticated attacker can cause a denial of service on the OpenVPN server by triggering a reachable assertion during packet-ID counter rollover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-7479?
CVE-2017-7479 is a medium-severity denial of service vulnerability in openvpn, published on 15 May 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker.
Weakness: CWE-617
Which versions are affected by CVE-2017-7479?
It affects 1 product.
Products include Openvpn Openvpn.
How do I fix CVE-2017-7479?
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-2017-7479 being exploited?
There is no known exploitation of CVE-2017-7479 in the wild and no public exploit code.
Other vulnerabilities in openvpn
Sources
Also known as ALPINE-CVE-2017-7479, DEBIAN-CVE-2017-7479, DLA-944-1, GHSA-qhqf-49x5-89w6, UBUNTU-CVE-2017-7479.