CVE-2020-24574
The client (aka GalaxyClientService.exe) in GOG GALAXY through 2.0.41 (as of 12:58 AM Eastern, 9/26/21) allows local privilege escalation from any authenticated user to SYSTEM by instructing the Windows service to execute arbitrary commands.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The client (aka GalaxyClientService.exe) in GOG GALAXY through 2.0.41 (as of 12:58 AM Eastern, 9/26/21) allows local privilege escalation from any authenticated user to SYSTEM by instructing the Windows service to execute arbitrary commands. This occurs because the attacker can inject a DLL into GalaxyClient.exe, defeating the TCP-based "trusted client" protection mechanism.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.62% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-798
- Affected
- gog/galaxy
- Source
- cve@mitre.org
References
- https://github.com/jtesta/gog_galaxy_client_service_pocExploit, Third Party Advisory
- https://github.com/jtesta/gog_galaxy_client_service_poc/issues/1#issuecomment-926932218Issue Tracking, Third Party Advisory
- https://www.gog.com/galaxyVendor Advisory
- https://www.positronsecurity.com/blog/2020-08-13-gog-galaxy_client-local-privilege-escalation_deuce/Exploit, Third Party Advisory
- https://github.com/jtesta/gog_galaxy_client_service_pocExploit, Third Party Advisory
- https://github.com/jtesta/gog_galaxy_client_service_poc/issues/1#issuecomment-926932218Issue Tracking, Third Party Advisory
- https://www.gog.com/galaxyVendor Advisory
- https://www.positronsecurity.com/blog/2020-08-13-gog-galaxy_client-local-privilege-escalation_deuce/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.