CVE-2020-6016

Game Networking Sockets vulnerability

CVSS

9.8

EPSS

5.8%

EPSS pct

92th

Exploited

No known

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.

Affected vendor

Valvesoftware

Affected product

Game Networking Sockets

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type (CWE)

CWE-590
CWE-787 — Out-of-bounds Write

Published

2020-11-18

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 5.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2020-6016

Confirm whether Valvesoftware Game Networking Sockets is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-6016.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-6016

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