CVE-2017-7508 Denial of service in OpenVPN

High 7.5 Published 27 Jun 2017 Updated 5 Aug 2024

Remote attackers can cause a denial of service in OpenVPN by sending malformed IPv6 packets, requiring an upgrade to patched versions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2017-7508?

CVE-2017-7508 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 remote denial-of-service when receiving malformed IPv6 packet.

Weakness: CWE-617

Which versions are affected by CVE-2017-7508?

It affects 1 product.

Linux distribution packages (5)

`openvpn` SUSE:Linux Enterprise Point of Sale 11 SP3	All versions	`2.0.9-143.46.1`
`openvpn` SUSE:Linux Enterprise Server 11 SP3-LTSS	All versions	`2.0.9-143.46.1`
`openvpn` SUSE:Linux Enterprise Server 11 SP3-TERADATA	All versions	`2.0.9-143.46.1`
`openvpn` SUSE:Linux Enterprise Server 11 SP4	All versions	`2.0.9-143.46.1`
`openvpn` SUSE:Linux Enterprise Server for SAP Applications 11 SP4	All versions	`2.0.9-143.46.1`

Products include Openvpn Openvpn.

How do I fix CVE-2017-7508?

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-2017-7508 being exploited?

There is no known exploitation of CVE-2017-7508 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2017-7508, GHSA-q55c-22v4-x379, SUSE-SU-2017:1642-1, UBUNTU-CVE-2017-7508.