CVE-2024-27198 and CVE-2024-27199: JetBrains TeamCity Multiple Authentication Bypass Vulnerabilities (FIXED)

Overview In February 2024, Rapid7’s vulnerability research team identified two new vulnerabilities affecting JetBrains TeamCity CI/CD server: CVE-2024-27198 is an authentication bypass vulnerability in the web component of TeamCity that arises from an alternative path issue (CWE-288) and has a CVSS base score of 9.8 (Critical). CVE-2024-27199 is an authentication bypass vulnerability in the web component of TeamCity that arises from a path traversal issue (CWE-22) and has a CVSS base score of 7.3 (High). On March 4, Rapid7 noted that JetBrains released a fixed version of TeamCity without notifying Rapid7 that fixes had been implemented and were generally available. When Rapid7 contacted JetBrains about their uncoordinated vulnerability disclosure, JetBrains published an advisory on the vulnerabilities without responding to Rapid7 on the disclosure timeline. JetBrains later responded to indicate that CVEs had been published. These issues were discovered by Stephen Fewer, Principal Security Researcher at Rapid7, and are being disclosed in accordance with Rapid7's vulnerability disclosure policy. Impact Both vulnerabilities are authentication bypass vulnerabilities, the most severe of which, CVE-2024-27198, allows for a complete compromise of a vulnerable TeamCity server by a remote unauthenticated attacker, including unauthenticated RCE, as demonstrated via our exploit: Compromising a TeamCity server allows an attacker full control over all TeamCity projects, builds,…Read More