Vulnerability · Published Jun 8, 2023 · Assigned by GitHub_M

CVE-2023-34243Windows user name disclosure in TGstation

Medium 5.8

In plain English

A medium-severity information exposure in tgstation-server from tgstation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)5.8Medium

Exploit odds (30 days)0.5%top 59.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
tgstation	tgstation-server	>= 4.0.0, < 5.12.5

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

References

https://github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76ph x_refsource_CONFIRM
https://github.com/tgstation/tgstation-server/pull/1526 x_refsource_MISC