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GoogleOSV:CVE-2023-34243

HistoryJun 08, 2023 - 10:15 p.m.

CVE-2023-34243

2023-06-0822:15:09

Google

osv.dev

tgstation

vulnerability

discovery

fix

windows

username

brute-forcing

endpoint

invalid password

upgrade

rate-limiting

api calls

fail2ban

CVSS3

5.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

32.6%

JSON

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.

References

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

github.com/tgstation/tgstation-server/security/advisories/GHSA-w3jx-4x93-76ph

CVSS3

5.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.9

Confidence

High

EPSS

0.001

Percentile

32.6%

JSON

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