CVE-2024-27199: 
JetBrains TeamCity vulnerability analysis and mitigation

JetBrains TeamCity versions before 2023.11.4 contain a path traversal vulnerability (CVE-2024-27199) that allows unauthorized users to perform limited administrative actions. The vulnerability was discovered and disclosed in March 2024, affecting the web component of TeamCity On-Premises servers (NVD, Arctic Wolf).

The vulnerability is classified as a path traversal issue (CWE-22, CWE-23) in the web component of TeamCity. It has been assigned a CVSS v3.1 base score of 7.3 (High), with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L. This indicates that the vulnerability can be exploited remotely without requiring privileges or user interaction (NVD).

When exploited, the vulnerability can lead to information disclosure and system modifications, including the ability to replace the HTTPS certificate of a vulnerable TeamCity server with a certificate of the attacker's choice (Arctic Wolf).

The vulnerability requires HTTP(S) access to a TeamCity Server for exploitation. While no active exploitation or Proof-of-Concept (PoC) exploits have been identified specifically for this vulnerability, it's worth noting that similar authentication bypass vulnerabilities in TeamCity have been targeted by threat actors in the past (Arctic Wolf).

JetBrains has released version 2023.11.4 to address this vulnerability. For users unable to upgrade immediately, JetBrains provides security patch plugins for different TeamCity versions (2018.2 and newer, and 2018.1 and older). All TeamCity Cloud servers have already been patched (Arctic Wolf, JetBrains Advisory).