Buffer overflow in Valvesoftware Game Networking Sockets
CVE-2020-6016
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.060 (93.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.060 · newest: 0.060 · change: 0.000
Affected products
- Valvesoftware Game Networking Sockets
- Game Networking Sockets — versions All versions prior to v1.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/ValveSoftware/GameNetworkingSockets/commit/e0c86dcb9139771db3db0cfdb… (Patch, Third Party Advisory)
- research.checkpoint.com/2020/game-on-finding-vulnerabilities-in-valves-steam-so… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-6016?
- CVE-2020-6016 is a critical-severity vulnerability in Valvesoftware Game Networking Sockets, classified under CWE-590. CVSS score: 9.8/10. Published 2020-11-18.
- How severe is CVE-2020-6016?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-6016 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.