JetBrains TeamCity Authentication Bypass Leading to Remote Code Execution
A critical authentication bypass vulnerability in JetBrains TeamCity allows unauthenticated attackers to execute arbitrary code on the TeamCity server through specially crafted HTTP requests. This vulnerability affects TeamCity versions prior to 2023.11.4.
This section explains the vulnerability in everyday language, so anyone can understand the risk and impact.
There is a dangerous security hole in JetBrains TeamCity, which is a popular software development tool used by companies to build and test their code. The vulnerability is particularly serious because it allows attackers to completely bypass the login system and take full control of the TeamCity server without needing any password or credentials.
Once attackers get in, they can run any code they want on the server, potentially accessing sensitive source code, credentials, and other confidential information stored in the TeamCity system. This could lead to data theft, system compromise, or using the server for malicious purposes.
This is especially concerning because TeamCity servers are often connected to other important development systems and contain valuable intellectual property.
Affected Products
Remediation
1. Immediately upgrade TeamCity to version 2023.11.4 or later
2. Until the upgrade is complete, consider temporarily disconnecting TeamCity servers from public network access
3. Review system logs for potential exploitation attempts
4. Audit build configurations and agent deployments for signs of compromise