CVE-2023-34243 MEDIUM

CVE-2023-34243: Windows user name disclosure in TGstation

Vendor Tgstation
Product tgstation-server
Weakness CWE-200 · Info exposure
Published June 8, 2023
Last update January 6, 2025
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CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

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

What the vulnerability does

01Description

TGstation is a toolset to manage production BYOND servers. In affected versions if a Windows user was registered in tgstation-server (TGS), an attacker could discover their username by brute-forcing the login endpoint with an invalid password. When a valid Windows logon was found, a distinct response would be generated. This issue has been addressed in version 5.12.5. Users are advised to upgrade. Users unable to upgrade may be mitigated by rate-limiting API calls with software that sits in front of TGS in the HTTP pipeline such as fail2ban.

Key dates

02Disclosure timeline

June 8, 2023 CVE published
January 6, 2025 Record updated