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Finding TeamCity On-Premises installations with runZero

, by Rob King
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On February 6th, 2024, JetBrains disclosed a serious vulnerability in the TeamCity On-Premises product.

The issue, CVE-2024-23917, allows attackers who can access the TeamCity installation via HTTPS to bypass authentication mechanisms and gain administrative privileges on the affected systems.

What is the impact? #

Upon successful exploitation of these vulnerabilities, attackers can execute arbitrary commands on the vulnerable system. This includes the creation of new users, installation of additional modules or code, and, in general, system compromise.

Are updates or workarounds available? #

JetBrains has released an update to mitigate this issue. Users are urged to update as quickly as possible.

How do I find potentially vulnerable TeamCity installations with runZero? #

From the Services Inventory, use the following query to locate assets running the vulnerable products in your network:

product:TeamCity

Additional fingerprinting research is ongoing, and additional queries will be published as soon as possible.

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Rob King
Written by Rob King

Rob King is a Principal Researcher at runZero. Over his career Rob has served as a senior researcher with KoreLogic, the architect for TippingPoint DVLabs, and helped get several startups off the ground. Rob helped design SC Magazine's Data Leakage Prevention Product of the Year for 2010, and was awarded the 3Com Innovator of the Year Award in 2009. He has been invited to speak at BlackHat, Shmoocon, SANS Network Security, and USENIX.

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