# CVE-2024-27198: TeamCity - Authentication Bypass

> Live exploitation tracking for CVE-2024-27198 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2024-27198

## Key facts

- **Exploitation phase:** Background Noise. Continuous low-level scanning or exploitation attempts are observed, mostly opportunistic and automated.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** JetBrains TeamCity
- **Weaknesses:** CWE-94 (Improper Control of Generation of Code ('Code Injection'))
- **Tags:** cicd

## Description

In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible

## CrowdSec analysis

[CVE-2024-27198](https://euvd.enisa.europa.eu/vulnerability/CVE-2024-27198) is a critical vulnerability in JetBrains TeamCity that allows unauthenticated attackers to bypass authentication controls and perform administrative actions.

CrowdSec has been tracking this vulnerability and its exploits since 19th of April 2024.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2024-27198 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting.
Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2024-27198 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2024-27198 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Exploitation attempts have been observed targeting URLs that include both `;.jsp` and `/app/rest/` in their path.

## Timeline

- 2024-03-04: CVE Published. CVE-2024-27198 is published to NVD.
- 2024-03-07: CISA KEV. CVE-2024-27198 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2024-03-28: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2024-04-19: Rule Released. CrowdSec releases a rule to detect CVE-2024-27198 exploitation attempts against the CrowdSec Network.
- 2024-11-23: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2024-27198 for the first time.

## References

- https://www.jetbrains.com/privacy-security/issues-fixed/
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-27198.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2024-27198) follows observed exploitation activity for CVE-2024-27198. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.