CVE-2005-2533 Denial of service in n/a

Low 2.1 Published 24 Aug 2005 Updated 7 Aug 2024

Authenticated remote attackers can cause memory exhaustion and denial of service in OpenVPN servers configured in dev tap mode by flooding spoofed MAC addresses.

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-2005-2533?

CVE-2005-2533 is a low-severity denial of service vulnerability in n/a, published on 24 Aug 2005. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses.

Which versions are affected by CVE-2005-2533?

It affects 1 product.

Products include Openvpn Openvpn.

How do I fix CVE-2005-2533?

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-2005-2533 being exploited?

There is no known exploitation of CVE-2005-2533 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2005-2533, GHSA-q7pv-xr8p-6j5f.