CVE-2020-6019 Denial of service in Game Networking Sockets

High 7.5 Published 13 Nov 2020 Updated 4 Aug 2024

An attacker can cause a crash in Valve's Game Networking Sockets library by sending malformed inlined statistics messages.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-6019?

CVE-2020-6019 is a high-severity denial of service vulnerability in Game Networking Sockets, published on 13 Nov 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles inlined statistics messages in function CConnectionTransportUDPBase::Received_Data(), leading to an exception thrown from libprotobuf and resulting in a crash.

Weakness: CWE-248

Which versions are affected by CVE-2020-6019?

It affects 1 product.

Products include Valvesoftware Game Networking Sockets.

How do I fix CVE-2020-6019?

No fix has been published for CVE-2020-6019 yet. Limit exposure of the affected software until one is available.

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-2020-6019 being exploited?

There is no known exploitation of CVE-2020-6019 in the wild and no public exploit code.

Sources

Also known as GHSA-fv4q-rrm4-jp4w.