CVE-2023-34243
MediumCVSS 5.8Exploitation Probability (EPSS)
Low risk36th percentile - higher than 36% of all known CVEs
Summary
CVE-2023-34243 affects the TGstation toolset that manages BYOND servers. In affected versions, an attacker could discover a Windows username by brute-forcing the login endpoint with an invalid password.
Risk Assessment
The risk involves the potential exposure of usernames, which could lead to further attacks on user accounts. This poses a threat to the security of the system and user data.
Recommendation
It is recommended to upgrade to version 5.12.5 to eliminate this vulnerability. Users unable to upgrade should implement rate-limiting API calls using software like fail2ban.
Original NVD description (English source)
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.