What is the vulnerability ID for this vulnerability?

The vulnerability ID for this vulnerability is CVE-2023-34243.

What is the severity of CVE-2023-34243?

The severity of CVE-2023-34243 is medium with a severity value of 5.3.

How can an attacker exploit CVE-2023-34243?

An attacker can exploit CVE-2023-34243 by brute-forcing the login endpoint with an invalid password to discover the username of a registered Windows user in tgstation-server.

How can I fix CVE-2023-34243?

To fix CVE-2023-34243, update tgstation-server to a version higher than 5.12.5.

Vulnerability/
CVE-2023-34243

medium

5.8

CWE

307 200

8/6/2023

6/1/2025

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

First published: Thu Jun 08 2023(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Tgstation 13	>=4.0.0.0<5.12.5

Remedy

https://github.com/tgstation/tgstation-server/pull/1526

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Reference Links

Frequently Asked Questions

What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2023-34243.
What is the severity of CVE-2023-34243?
The severity of CVE-2023-34243 is medium with a severity value of 5.3.
What is TGstation?
TGstation is a toolset to manage production BYOND servers.
How can an attacker exploit CVE-2023-34243?
An attacker can exploit CVE-2023-34243 by brute-forcing the login endpoint with an invalid password to discover the username of a registered Windows user in tgstation-server.
How can I fix CVE-2023-34243?
To fix CVE-2023-34243, update tgstation-server to a version higher than 5.12.5.

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vendor/tgstation13
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version/tgstation 13/4.0.0.0

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