CVE-2020-6016 Memory corruption in Game Networking Sockets
A heap-based buffer underflow in Valve's Game Networking Sockets library allows remote attackers to potentially execute arbitrary code via crafted unreliable segments.
- 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-2020-6016?
CVE-2020-6016 is a critical memory corruption vulnerability in Game Networking Sockets, published on 18 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 unreliable segments with negative offsets in function SNP_ReceiveUnreliableSegment(), leading to a Heap-Based Buffer Underflow and a free() of memory not from the heap, resulting in a memory corruption and probably even a remote code execution.
Which versions are affected by CVE-2020-6016?
It affects 1 product.
Products include Valvesoftware Game Networking Sockets.
How do I fix CVE-2020-6016?
No fix has been published for CVE-2020-6016 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-6016 being exploited?
There is no known exploitation of CVE-2020-6016 in the wild and no public exploit code.
Other vulnerabilities in Game Networking Sockets
Sources
Also known as GHSA-2rgm-7354-cfw6.