CVE-2023-42793: JetBrains TeamCity Authentication Bypass Vulnerability

CVE-2023-42793 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2023-10-04

An authentication bypass vulnerability in JetBrains TeamCity allows unauthenticated attackers to perform remote code execution (RCE) on the TeamCity Server. The flaw stems from missing authentication for critical functions or an alternate path/channel bypass.

Technologies: Jetbrains TeamCity. Vendors: Jetbrains.

Quick answers

Is CVE-2023-42793 exploited in the wild?
Yes. CVE-2023-42793 is known to be exploited in the wild, first recorded on 4 October 2023. Treat it as urgent.
How severe is CVE-2023-42793?
Critical severity, with a CVSS score of 9.8, published 4 October 2023.
Which products and versions are affected?
JetBrains TeamCity before 2023.05.4.
Is there a fix for CVE-2023-42793?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2023-42793 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2023-42793?
Check whether you run Jetbrains TeamCity. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • JetBrains TeamCity before 2023.05.4

Timeline

  • 2023-09-25: disclosed: Public blog posts regarding the vulnerability published by Rapid7 and JetBrains.
  • 2023-10-04: kev added: Added to CISA's Known Exploited Vulnerabilities (KEV) Catalog.
  • 2023-10-04: advisory: NVD publication date.
  • 2023-10-04: exploited: Reported as exploited in the wild.

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