30. 06. 2024
SOCnews
11. 03. 2024
Mirko Ioris
SOCnews
SOC News | Mar 11 – JetBrains TeamCity Authentication Bypass Vulnerabilities
On March 4, 2024, JetBrains released TeamCity version 2023.11.4, which patches two authentication bypass vulnerabilities in the web component of TeamCity. These vulnerabilities were discovered in February by Rapid7’s vulnerability research team and allow a remote unauthenticated attacker to perform a complete compromise of a vulnerable TeamCity installation, including unauthenticated RCE (remote code execution).
| CVE Number | CVSS Score | EPSS Score |
| CVE-2024-27198 | 9.8 (Critical) | 97% (Critical) |
| CVE-2024-27199 | 7.3 (High) | 0% (Low) |
The vulnerabilities affect all TeamCity On-Premises versions through 2023.11.3 and have been fixed in version 2023.11.4. All users are encouraged to update their servers to the latest version, especially because Rapid7 has disclosed all details related to the vulnerabilities, and threat actors are already exploiting them.
The JetBrains team also released security patch plugins to allow users who cannot update the server to patch their environment:
- Security Plugin for TeamCity 2018.2 and newer
- Security Plugin for TeamCity 2018.1 and older
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Mirko Ioris
Technical Consultant - Cyber Security Team | Würth Phoenix
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